Dissertationen: „Partners search“

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Hemel, Stefan. "How are partners used in the search for innovations? A systematic review." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/8055.

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The importance of search partnerships has grown as a mode to search for innovations. However, in spite of this development, notions of open innovation combined with new propositions to change the search process in favour of sustainability have unravelled a need to take stock of the existing literature of search partnerships and the aims that these partnerships follow. This review addresses this shortcoming and synthesises the literature on search partnerships to analyse the current state of knowledge to deliver future research opportunities. A systematic review process was adopted by means of a set a set of pre-defined stages. These stages included the formulation and positioning of the review question within the larger literature domains, a systematic research process which included the adoption of search strings, relevance and quality appraisal criteria, as well as a stock-taking process of descriptive and thematic features, which followed the logic of prescriptive synthesis. This process led to a representative sample of 73 articles which were analysed subsequently. The tentative findings reveal that the literature is underpinned by a combination of theories linking to evolutionary or transaction-based understandings of search partnerships. Also, six conditions were found to drive search partnerships and when they are likely to form. Moreover five interventions were identified that relate to the use of search methods, boundary spanning activities, and the number, type and involvement levels with the partner. Finally search partnerships have been found to yield five outcomes: partnerships, and various types of innovations, higher social goals, as well as market knowledge. By combining contexts, interventions, and outcomes, research opportunities are identified that should inform future reviews, including the need for more research in sustainability-led search partnership contexts and a better understanding of search strategy configurations in relation interventions used and anticipated search partnership outcomes obtained.

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Abulaiti, Yiming. "Search for Pair-Produced Supersymmetric Top Quark Partners with the ATLAS Experiment." Doctoral thesis, Stockholms universitet, Fysikum, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-132289.

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Searches for the supersymmetric partner of the top quark (stop) are motivated by natural supersymmetry, where the stop has to be light to cancel the large radiative corrections to the Higgs boson mass. This thesis presents three different searches for the stop at √s = 8 TeV and √s = 13 TeV using data from the ATLAS experiment at CERN’s Large Hadron Collider. The thesis also includes a study of the primary vertex reconstruction performance in data and simulation at √s = 7 TeV using tt and Z events. All stop searches presented are carried out in final states with a single lepton, four or more jets and large missing transverse energy. A search for direct stop pair production is conducted with 20.3 fb−1 of data at a center-of-mass energy of √s = 8 TeV. Several stop decay scenarios are considered, including those to a top quark and the lightest neutralino and to a bottom quark and the lightest chargino. The sensitivity of the analysis is also studied in the context of various phenomenological MSSM models in which more complex decay scenarios can be present. Two different analyses are carried out at √s = 13 TeV. The first one is a search for both gluino-mediated and direct stop pair production with 3.2 fb−1 of data while the second one is a search for direct stop pair production with 13.2 fb−1 of data in the decay scenario to a bottom quark and the lightest chargino. The results of the analyses show no significant excess over the Standard Model predictions in the observed data. Consequently, exclusion limits are set at 95% CL on the masses of the stop and the lightest neutralino.

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Küchler, Jan [Verfasser]. "Search for Partners of the Top Quark with the ATLAS Experiment / Jan Küchler." Wuppertal : Universitätsbibliothek Wuppertal, 2018. http://d-nb.info/1169069126/34.

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Vatsvåg, Ole. "The search for R&D partners: Mapping collaborations and expertise in interorganisational networks." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for industriell økonomi og teknologiledelse, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23197.

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Companies, academic institutions and not-for-profit organisations in the High Energy Physics community have recently expressed a need for a service or tool that can simplify and improve the partner selection process in research and development (R&D) -collaborations. Today, partner selection is carried through differently, from organisation to organisation. It is often an informal process, heavily influenced by managements? personal networks. The literature, however, suggests a more rational and systematic two-step approach called searching and screening. This document proposes a conceptual framework for partner selection in R&D-collaborations, as a solution to this challenge. The framework is based on prior literature, and empirical findings from CERN.The most important organisational characteristics in any R&D-collaboration are capability and knowledge concerning the technological challenges of the collaboration. The success of the collaboration is dependent on these characteristics, and so are the prospects for knowledge transfer among the participating organisations. Thus the ideal partner for R&D-collaboration should be the most capable or knowledgeable organisation that is either applying or developing the technologies most relevant to the collaboration?s central challenges. In addition, the organisation should preferably hold beneficial contacts throughout its organisational network, which the collaboration can draw benefits from.Prior studies have suggested that capability and knowledge can be measured by the means of bibliometric documents, such as publications and patents. These documents contain details on their affiliated organisations. That information can be used to create graphical representations of interorganisational networks; so called sociograms. A set of sociograms based on publications and patents in a given technological field, can reveal the most capable and knowledgeable organisations in that field.Five technologies related to Position-Sensitive Solid-State particle detectors are reviewed in this study. Sociograms of the organisations developing and using each of the technologies have been created, by the means of an IT tool. The IT tool constitutes the core functions of the conceptual framework. Several technical experts affiliated with CERN have evaluated the pertinence of the sociograms, and provided feedback on the methods of the framework and its corresponding IT tool.Interorganisational R&D-collaboration is a significant driver for technological innovation. Many revolutionary discoveries in medical science, power production and computer technology have been developed and commercialised as a result of collaborative arrangements. It is therefore in the interest of humanity to promote and create incentives for this kind of cooperation.

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Lasić, Maja. "The yeast endosomal/TGN-localized Ysl2p-Arl1p-Neo1p network: search for novel interaction partners." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-34910.

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Ottenschläger, Iris. "Gravity regulated differential auxin transport in Arabidopsis roots and the search for interaction partners of AtPIN1." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964941848.

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Qiang, Yi Ph D. Massachusetts Institute of Technology. "Search for pentaquark partners [Theta]⁺⁺, [Sigma]⁰ and N⁰ in H (e,e'K [pi])) X reactions at Jefferson Lab Hall A." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/45410.

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In title on t.p., "[Theta]", "[Sigma]", and "[pi]" appear as Greek letters. Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2007. Includes bibliographical references (p. 169-175). In 1997, D. Diakonov et al. using a soliton model predicted a SU(3)F flavor antide-cuplet of pentaquarks. The most striking prediction using this symmetry group is a narrow exotic state, E+(1540), which has quark component uuddg. If such a state is confirmed, other members of the antide cuplet could be expected to have sufficiently narrow widths to be observed as well. The Jefferson Laboratory experiment E04-012 focused on the search for EO and NO partner states in the missing mass spectra of the H(e,e'K+)X and H(e,e'ir+)X channels. In addition, if the 8+ has non-zero isospin then a hypothetical isospin partner, O++, might be expected in the H(e,e'K-)X channel; this was also investigated. The experiment was performed in Hall A at Jefferson Lab using a 5 GeV electron beam incident on a liquid hydrogen target. The two high resolution magnetic spectrometers were coupled to septum magnets to allow measurement of scattered electrons and outgoing hadrons at angles as small as 6 degrees. The missing mass resolution was determined to be 3.5 MeV/c2 FWHM using neutron, A(1116) and E(1193) production and provided a high sensitivity to narrow resonances. A precise measurement of the A(1520) resonance has also been conducted for a cross-section comparison. As a result, no significant narrow resonances were observed in any of the three reaction channels being investigated. Based on this fact, a likelihood scan using the G. Feldman and R. Cousins method was performed. The analysis provided total cross section upper limits at 90% confidence level with no lower limits or always below background fluctuation. by Yi Qiang. Ph.D.

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Alves, Nunes Köppel Carolina Ellen, and Martin Stazic. "Better Together - NGO and Business Solve Environmental Issues : Investigating the partner search of local, regional, and international NGOs." Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104398.

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Addressing environmental issues is becoming increasingly important for businesses and NGOs. In addition, through the internationalisation of these organisations, the problem is becoming global. To address environmental issues in an effective way, there is a need to form a cross-sector collaboration between NGOs and businesses. Thus, to have a successful collaboration, it is important to search for suitable partners. This thesis investigates the partner search process of NGOs for cross-sector collaboration. It investigates how the process of partner search with regard to drivers for collaboration, formation typology, success factors compatibility, resources, and capability, as well as trust affect the partner search of three NGOs with different internationalisation degrees. A literature review has been conducted to investigate what has been discussed regarding the key concepts: environment, internationalisation degree, partner search, formation, drivers, and success factors. The resulted conceptual framework is used to analyse the empirical data. The study was conducted following an abductive approach since existing literature is only existent on firm-perspective so far. To investigate the NGO´s partner search for potential business partners, the thesis follows qualitative research where semi-structured interviews were conducted to create three single cases. The cases represent three internationalisation degrees, namely local NGO, regional NGO, and international NGO. The analysis discusses the differences and similarities between the empirical findings and the theoretical findings. The conclusion suggests that the internationalisation degree influences the partner search process slightly in every key concept. This is mainly due to the interdependence between each concept, which challenges a clear distinction. Nevertheless, the main implication for theory is the contribution to the so-far missing NGO perspective on the partner search in cross-sector collaboration. This thesis also provides practical implications where it appeals for NGOs to clearly understand the intention of the business partner for the collaboration and build trust. The study concludes with limitations and future research implications.

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Schmitt, Dominique [Verfasser], Michael [Gutachter] Sendtner, and Erich [Gutachter] Buchner. "Initial characterization of mouse Syap1 in the nervous system: Search for interaction partners, effects of gene knockdown and knockout, and tissue distribution with focus on the adult brain / Dominique Schmitt ; Gutachter: Michael Sendtner, Erich Buchner." Würzburg : Universität Würzburg, 2017. http://d-nb.info/1130588033/34.

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Riggs, Charlotte. "Search behaviour in real world tasks : the influence of working with a partner." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/411283/.

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Dafinca, Alexandru. "Searches for supersymmetric partners of the bottom and top quarks with the ATLAS detector." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:7b5457ac-0521-4c8d-af03-d0a347ef3b60.

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Supersymmetry is a promising candidate theory that could solve the hierarchy problem and explain the dark matter density in the Universe. The ATLAS experiment at the Large Hadron Collider is sensitive to a variety of such supersymmetric models. This thesis reports on a search for pair production of the supersymmetric scalar partners of bottom and top quarks in 20.1 fb−1 of pp collisions at a centre-of-mass energy of 8 TeV using the ATLAS experiment. The study focuses on final states with large missing transverse momentum, no electrons or muons and two jets identified as originating from a b-quark. This final state can be produced in a R-parity conserving minimal supersymmetric scenario, assuming that the scalar bottom decays exclusively to a bottom quark and a neutralino and the scalar top decays to a bottom quark and a chargino, with a small mass difference with the neutralino. As no signal is observed above the Standard Model expectation, competitive exclusion limits are set on scalar bottom and top production, surpassing previously existing limits. Sbottom masses up to 640 GeV are excluded at 95% CLs for neutralino masses of up to 150 GeV. Differences in mass between ~b1 and ~X01 larger than 50 GeV are excluded up to sbottom masses of 300 GeV. In the case of stop pair production and decay ~t1 → b + ~X±1 and ~X±1 → ~X01 + W* with mass differences &triangle;m = m~X±1 − m~X01 = 5 GeV (20 GeV), stop masses up to 580 GeV (440 GeV) are excluded for m~X01 = 100 GeV. Neutralino masses up to 280 GeV (230 GeV) are excluded for m~t1 = 420 GeV for &triangle;m = 5 GeV (20 GeV). In an extension of this analysis, sbottom quarks cascade-decaying to at least a Higgs boson are searched for in final states with large missing transverse momentum, at least 3 b-tagged jets and no electrons or muons, using neural network discriminants.

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Robalo, Cristiana Isabel Martins. "Processo de recrutamento e seleção na Global Partner." Master's thesis, Instituto Superior de Economia e Gestão, 2017. http://hdl.handle.net/10400.5/14452.

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Mestrado em Gestão de Recursos Humanos As práticas de recrutamento e seleção são consideradas como uma das áreas centrais e estratégicas para o funcionamento das organizações, onde as pessoas são vistas como a maior fonte de vantagem competitiva das empresas. Considerada também como uma ferramenta de gestão de pessoas nas organizações, é através do processo de recrutamento e seleção que as organizações percebem a importância das pessoas que a compõem, não só como colaboradores, mas também como parceiros. Assim, é necessário que a estratégia organizacional se foque numa gestão de pessoas rigorosa perante processos de recrutamento e seleção. O presente Trabalho Final de Mestrado tem como objetivo apresentar as fases, as práticas e atividades relacionadas com o processo de recrutamento e seleção na Global Partner, empresa de Consultoria de Recursos Humanos, nomeadamente na área das Tecnologias de Informação. De entre os diversos métodos de recrutamento externo existentes, é dado ênfase ao Executive Search e ao Head-Hunting, uma vez que são os principais métodos utilizados pela empresa na pesquisa de candidatos. A par da caracterização da empresa e da descrição pormenorizada das actividades realizadas no estágio, o presente relatório inclui uma comparação entre a revisão da literatura sobre recrutamento e selecção e a prática corrente na empresa, assim como uma apreciação pessoal sobre o estágio e o relatório. Recruitment and selection practices are considered as one of the central and strategic areas for the functioning of organizations, where people are seen as the greatest source of competitive advantage of companies. Also considered as a people management tool in organizations, it is through the process of recruitment and selection that organizations perceive the importance of people that make it up, not only as collaborators, but also as partners. Thus, it is necessary that the organizational strategy focuses on a rigorous management of people in recruitment and selection processes. The purpose of this Master's Dissertation is to present the phases, practices and activities related to the recruitment and selection process in the Global Partner, a Human Resources Consulting company, namely in the area of Information Technologies. Among the various external recruitment methods available, emphasis is placed on Executive Search and Head-Hunting, as these are the main methods used by the company in candidate search. In addition to the company characterization and the detailed description of the activities carried out during the training period, this report includes a comparison between the literature review on recruitment and selection and the current practice in the company, as well as a personal assessment of the training and report. info:eu-repo/semantics/publishedVersion

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Wanotayaroj, Chaowaroj. "Search for a Scalar Partner of the Top Quark in the Jets+ETMiss Final State with the ATLAS detector." Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22275.

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This dissertation presents searches for direct pair production of a scalar partner of the top quark in events with only jets and \acrlong{met} in proton--proton collisions recorded during LHC Run 1 and Run 2 with the ATLAS detector. In the supersymmetry scenario, the partner is called top squark or stop. The stop ($\stop$) is assumed to decay via $\stop \to t \ninoone$, $\stop\to b\chinoonepm \to b W^{\left(\ast\right)} \ninoone$, or $\stop\ra bW\ninoone$, where $\ninoone$ ($\chinoonepm$) denotes the lightest neutralino (chargino). Exclusion limits are reported in terms of the stop and neutralino masses. The LHC Run 1 analysis uses an integrated luminosity of 20.1~{\ifb} at $\acrshort{sqrts}=8~\tev$ to exclude top squark masses in the range $270$--$645~\GeV$ for $\ninoone$ masses below $30~\GeV$, assuming a 100\% $\stop \to t \ninoone$ \gls{br}. For a \gls{br} of $50\%$ to either $\stop \to t \ninoone$ or $\stop\to b\chinoonepm$, and assuming $m_{\chinoonepm} = 2 m_{\ninoone}$, stop masses in the range $250$--$550~\GeV$ are excluded for $\ninoone$ masses below $60~\GeV$. The LHC Run 2 analysis uses an integrated luminosity of 13.3~{\ifb} at $\acrshort{sqrts}=13~\tev$. Assuming a 100\% $\stop \to t \ninoone$ \gls{br}, stop masses in the range $310$--$820~\GeV$ are excluded for $\ninoone$ masses below $160~\GeV$. For $\mstop\sim m_t+\mLSP$ scenario, the search excludes stop masses between $23$--$380~\GeV$. Additionally, scenarios where stops are produced indirectly through gluino decay but have very low $p_T$ signature due to a very small $\Delta (\mstop, \mLSP)$, have been considered. The result is interpreted as an upper limit for the cross section in terms of the gluino and stop masses. This excludes all models considered which include $m_{\gluino}$ up to 1600~\GeV\ with $\mLSP<560~\GeV$ at 95\% CL. Finally, the analysis strategy from the LHC Run 1 search is applied in the broader scope of supersymmetry called \gls{pmssm}. This dissertation presents a summary of the results that related to the stop search.

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Figueiredo, Lígia Baruch de. "Tinderelas: busca amorosa por meio de aplicativos para smartphones." Pontifícia Universidade Católica de São Paulo, 2016. https://tede2.pucsp.br/handle/handle/18981.

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Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2016-09-01T14:33:58Z No. of bitstreams: 1 Lígia Baruch de Figueiredo.pdf: 1298049 bytes, checksum: 781f6aa407bcee4b9c0d711e3eacf7ef (MD5) Made available in DSpace on 2016-09-01T14:33:58Z (GMT). No. of bitstreams: 1 Lígia Baruch de Figueiredo.pdf: 1298049 bytes, checksum: 781f6aa407bcee4b9c0d711e3eacf7ef (MD5) Previous issue date: 2016-04-06 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior The overall objective of this Thesis was to understand the use unmarried adult women (single, widowed or separated) are doing of partner search applications. The theoretical contributions were the critical studies of gender and the theory of romantic attachment. The method was qualitative and the instrument used was the interview. Semi-directed interviews were conducted with five women over 35 years of urban middle class with high educational levels and adepts of new technologies, which reported their experiences of the use and their perceptions about the impact of applications of meetings in the contemporary relationships. The results led to the formulation of a proposal for three styles of usage of applications partner search: the curious use, recreational use and rational use. As for the impact on the formation of romantic relationships we observed that these widen the possibilities for meetings for different purposes. Applications for meetings also highlighted some aspects of contemporary romantic relationships, such as greater exposure, quantity and speed interactions, persistent romantic ideas updated through adaptations, and belief in technology, rationality and self-knowledge for a better partner selection. The dating applications are valid resources and increasingly popular in searching loving partnership. In general its uses reflect the typified behaviors of gender of our society, but also they facilitate the emergence of more recreational female sexual behaviors, which can contribute for greater equality between genders O objetivo geral desta Tese foi compreender o uso que mulheres adultas não casadas (solteiras, viúvas ou separadas) estão fazendo de aplicativos de busca de parceiros. Os aportes teóricos foram os estudos críticos de gênero e a teoria do apego romântico. O método foi qualitativo e o instrumento utilizado foi a entrevista. Foram realizadas entrevistas semi-dirigidas com cinco mulheres acima dos 35 anos das camadas médias urbanas, com altos níveis educacionais e adeptas das novas tecnologias, que relataram suas experiências de uso e suas percepções a respeito do impacto dos aplicativos para encontros nos relacionamentos contemporâneos. Os resultados levaram à formulação de uma proposta de três estilos de uso dos aplicativos para busca de parceiros: o uso curioso, o uso recreativo e o uso racional. Quanto ao impacto na formação dos relacionamentos amorosos observamos que os aplicativos ampliam as possibilidades de encontros para diferentes propósitos. Os aplicativos para encontros também colocam em destaque alguns aspectos dos relacionamentos amorosos contemporâneos, tais como: maior exposição, quantidade e velocidade nas interações, ideias românticas persistentes e atualizadas por meio de adaptações e crença na tecnologia, na racionalidade e no autoconhecimento para uma melhor seleção de parceiro. Os aplicativos de encontros são recursos válidos e cada vez mais populares para a busca de parceria amorosa. De maneira geral seus usos refletem os comportamentos tipificados de gênero da nossa sociedade, mas também facilitam a emergência de comportamentos sexuais femininos mais recreativos, o que pode contribuir para uma maior equidade entre os gêneros

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Jansova, Markéta. "Search for the supersymmetric partner of the top quark and measurements of cluster properties in the silicon strip tracker of the CMS experiment at Run 2." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAE018/document.

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Cette thèse présente trois études différentes basées sur les données de CMS du Run 2. Les deux premières sont des mesures des propriétés des amas dans le trajectographe à pistes de silicium de CMS, liées respectivement aux particules hautement ionisantes (HIP) et au partage de charge entre les pistes voisines (également appelé diaphonie). Le dernier sujet abordé dans ce document est la recherche du partenaire supersymétrique du quark top, appelé stop. Une augmentation de l’inefficacité de reconstruction des hits dans le trajectographe à pistes de silicium de CMS a été observée au cours des années 2015 et 2016. Les particules hautement ionisantes ont été identifiées comme une cause possible de ces inefficacités. Cette thèse apporte des résultats qualitatifs et quantitatifs sur l’effet HIP et sa probabilité. Le HIP n’était pas la source la plus importante d’inefficacité et, une fois la source identifiée et corrigée, les nouvelles données révèlent qu’après cette correction, le HIP représente à présent la principale source d’inefficacité. La seconde étude présentée porte sur les conditions utilisées dans la simulation du trajectographe par CMS afin de fournir des résultats réalistes. Ces conditions changent avec les conditions de fonctionnement du trajectographe et évoluent avec le vieillissement du trajectographe résultant des dommages causés par le rayonnement. Nous avons constaté que les paramètres de diaphonie obsolètes avaient une grande incidence sur la forme de l’amas. Dans cette thèse, les paramètres ont été réévalués et il a été confirmé que les nouveaux paramètres améliorent grandement l’accord des amas entre données et simulation. La dernière partie décrit en profondeur la recherche de stop en utilisant les données collectées en 2016 (correspondant à ∫L = 35.9 fb−1) avec un lepton dans l’état final. Aucun excès n’a été observé par rapport aux prédictions attendues par le modèle standard et les résultats ont été interprétés en terme de limites d’exclusion sur des modèles simplifiés This thesis presents three different studies based on the CMS Run 2 data. The first two are measurements of the cluster properties in the CMS silicon strip tracker related respectively to the highly ionizing particles (HIP) and the charge sharing among neighboring strips (also known as cross talk). The last topic discussed in this document is the search for the supersymmetric partner of the top quark, called the stop. An increase in the hit inefficiency of the CMS silicon strip tracker was observed during the years 2015 and 2016. The highly ionizing particles were identified as a possible cause of these inefficiencies. This thesis brings qualitative and quantitative results on the HIP effect and its probability. The HIP was found not to be the largest source of inefficiency at that time and once the source was identified and fixed, the new data revealed that after this fix the HIP now represents the major source of the hit inefficiency. The second study presented in this thesis focuses on the conditions plugged in CMS tracker simulation in order to provide realistic results. These conditions change with the tracker operating conditions and also evolve with tracker ageing resulting from the radiation damage. We identified that the outdated cross talk parameters largely impact the cluster width and seed charge. In this thesis the parameters were remeasured and it was confirmed that the new parameters largely improve the agreement of clusters between data and simulation. The last part describes deeply the stop analysis using data recorded in 2016 (corresponding to ∫L =35.9 fb−1) with single lepton in the final state. No excess was observed in the full 2016 data (∫L = 35.9 fb−1) with respect to the standard model background predictions and therefore exclusion limits in terms of simplified model spectra were derived

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Snyder, Ian. "Search for a Scalar Partner of the Top Quark in the Jets+ETmiss Final State in Proton-Proton Collisions at √s=13 TeV with the ATLAS Detector." Thesis, University of Oregon, 2018. http://hdl.handle.net/1794/23724.

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This dissertation presents a search for pair production of a scalar partner to the top quark in proton-proton collisions at the ATLAS detector at the Large Hadron Collider (LHC). The LHC is a particle accelerator located in Geneva, Switzerland that collides two beams of protons. ATLAS is a general purpose detector and is one of four detectors at the LHC. The data used in this analysis was recorded during Run 2 with a total of 36.1 fb-1 at a center-of-mass energy of √s=13 TeV. In supersymmetry, the scalar partner to the top quark is the stop, which decays to a top quark and neutralino or to a bottom quark and chargino. The experimental signature considered is four or more jets plus missing transverse momentum. The data yielded no significant excess over the Standard Model background expectation, and exclusion limits are reported in terms of the stop and neutralino masses. Assuming a branching fraction of 100% to a top quark and neutralino, stop masses in range 450-1000 GeV are excluded for neutralino masses below 160 GeV. In the case where the stop mass is close to the top mass plus the neutralino mass, masses between 235-590 GeV are excluded. The results are also interpreted in terms of the phenomenological Minimal Supersymmetric Standard Model. Additionally, work on an upgrade to the ATLAS trigger system, the Global Feature Extractor (gFEX), is presented. This upgrade will have the unique ability to scan over the entire calorimeter to trigger on global variables and large radius jets. A scheme was developed to calibrate the gFEX that also reduces pileup noise. This dissertation includes previously published coauthored material.

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McFayden, Joshua A. "Searches for supersymmetric partners of third generation quarks and measurement of the tt ̄+Z process using the ATLAS detector at the CERN Large Hadron Collider." Thesis, University of Sheffield, 2013. http://etheses.whiterose.ac.uk/5264/.

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This thesis presents results using data collected by the ATLAS experiment during 2011 and 2012 at √s = 7 TeV and 8 TeV respectively. The focus of the work presented in this thesis is separated into two areas, measurement of the tt ̄+Z process and searches for the supersymmetric partners to third generation quarks. Firstly, a search for tt ̄+ Z production using 4.7 fb−1 of √s = 7 TeV data is described including the generation of the dedicated simulated signal Monte Carlo samples for the analysis. The result is interpreted in terms of a 95% probability upper limit on the tt ̄+ Z production cross section of 0.71 pb. This is compatible with NLO Standard Model prediction of 0.14 pb. Secondly, a number of searches for the supersymmetric partners of bottom (sbottom) and top (stop) quarks are described. The first is a search for sbottom squark pair production in the b_1 → b_1 χ^0_1 decay channel using 2.05 fb−1 of √s = 7 TeV ATLAS data. No significant excess is observed above the Standard Model expectation and exclusion limits at the 95% confidence level are set in the m_b_1 − m_χ^0_1 plane. For a massless neutralino sbottom masses are excluded up to 390 GeV. For neutralino mass of 120 GeV sbottom masses are excluded for 275 < m_b_1 < 350 GeV. Finally two searches for stop squark pair production in the t_1 → t_! χ^0_1 decay channel are described, one using 4.7 fb−1 of √s = 7 TeV data and the other using 20.5 fb−1 of √s = 8 TeV data. Again, no significant excess is observed above the Standard Model expectation and exclusion limits at the 95% confidence level are set in the m_t1 − m_χ^0_1 plane. For a nearly massless neutralino, stop masses between 320 and 660 GeV are excluded. For neutralino mass of 150 GeV, stop masses are excluded between 400 and 620 GeV.

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Giulini, Maddalena [Verfasser], and André [Akademischer Betreuer] Schöning. "Search for the supersymmetric top quark partner with the HEPTopTagger algorithm in proton-proton collisions at sqrt s = 8 TeV with the ATLAS detector / Maddalena Giulini ; Betreuer: André Schöning." Heidelberg : Universitätsbibliothek Heidelberg, 2017. http://d-nb.info/1180739558/34.

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19

Miano, Fabrizio. "Optimisation studies and data-driven background estimation in searches for the supersymmetric partner of the top quark with the ATLAS Detector at the LHC." Thesis, University of Sussex, 2018. http://sro.sussex.ac.uk/id/eprint/80277/.

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This thesis presents the search for the supersymmetric partner of the top quark in p s Æ 13 TeV proton-proton collisions at the LHC using data collected by the ATLAS detector in 2015 and 2016. Results were interpreted considering natural supersymmetric extensions of the Standard Model in R-parity conserving decays. Events characterised by four or more jets and missing transverse momentum in the final states were selected. The performance of the tracking algorithms used by the ATLAS online trigger were studied. Optimisation studies of the search regions to increase the sensitivity to supersymmetric signals were performed and data-driven techniques to estimate StandardModel backgrounds were employed. The agreement between data and background predictionswas extensively checked and the extrapolations frombackgroundenriched regions to signal-enriched regions were validated. The analysis yielded no significant excess therefore exclusion limits on various models were set.

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Ungaro, Francesca Consiglia [Verfasser], and Karl [Akademischer Betreuer] Jakobs. "Search for the Supersymmetric Partner of the Top Quark with the ATLAS Detector via $\tildet}^}_{1} \rightarrow t \widetilde{\chi}^{0}_{1}$ and $\tilde{t}^{}_{1} \rightarrow b \widetilde{\chi}^{\pm}_{1}$ Decays." Freiburg : Universität, 2015. http://d-nb.info/1119805546/34.

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21

Ruiz, Alvarez José David. "Search for a vector-like quark T' decaying into top+Higgs in single production mode in full hadronic final state using CMS data collected at 8 TeV." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10180.

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Le LHC (Large Hadron Collider) a produit en 2012 des collisions proton proton à une énergie de 8 TeV dans le centre de masse pour les expériences ATLAS et CMS. Ces deux expériences ont été conçues pour découvrir le boson de Higgs et pour rechercher de nouvelles particules prédites par des modèles théoriques. Le boson de Higgs a été découvert le 4 juillet 2012 par les expériences ATLAS et CMS. Cette découverte marque le début d'une nouvelle période de recherche dans le domaine. Avec la confirmation de l'existence du boson de Higgs, les recherches de nouvelle physique liées à ce boson sont devenues prioritaires. Par exemple, on peut chercher dans les données une nouvelle particule massive qui peut se désintégrer dans un boson de Higgs associé à d'autres particules du modèle standard. Une signature attendue est un boson de Higgs avec un quark top, les deux particules les plus lourdes du modèle standard. Le modèle standard prédit une section efficace pour la production du Higgs avec un quark top. Ainsi une mesure de cette section efficace montrant une valeur plus importante prouverait l'existence de physique au-delà du modèle standard. En outre, l'existence de physique au-delà le modèle standard pourrait montrer des résonances qui se désintègrent dans un quark top et un boson de Higgs. Dans la première partie de ce manuscrit, je présente les bases théoriques et expérimentales du modèle standard, ainsi que le dispositif expérimental. Dans le même chapitre théorique je discute une extension du modèle standard dans le cadre d'un modèle effectif englobant ce dernier. De plus, je détaille une étude de faisabilité d'une recherche d'une des nouvelles particules prédites par ce modèle, un quark vectoriel. Dans la deuxième partie, la recherche dans CMS de ce quark vectoriel T_, partenaire du quark top, est décrite. Ce partenaire du top est une nouvelle particule très similaire au quark top du modèle standard, mais beaucoup plus lourde. On considère le cas où ce nouveau quark se désintègre préférentiellement dans un quark top et un boson de Higgs. J'ai fait cette recherche dans le canal hadronique ou le Higgs se désintègre en deux quarks b et le quark top se désintègre en trois quarks, un quark b et deux quarks légers. J'ai reconstruit la masse du T_ à partir de l'identification de tous ses produits de désintégration. Le résultat obtenu est décrit sous forme des limites observées sur la section efficace de production du T_ déduites à partir de cette analyse During 2012, the Large Hadron Collider (LHC) has delivered proton-proton collisions at 8 TeV center of mass energy to the ATLAS and CMS experiments. These two experiments have been designed to discover the Higgs boson and to search for new particles predicted by several theoretical models, as supersymmetry. The Higgs boson has been discovered by ATLAS and CMS experiments on July, 4th of 2012, starting a new era of discoveries in particle physics domain. With the confirmation of the existence of the Higgs boson, searches for new physics involving this boson are of major interest. In particular, data can be used to look for new massive particles that decay into the Higgs boson accompanied with other particles of the standard model. One expected signature is a Higgs boson produced with a top quark, the two heaviest particles in the standard model. The standard model predicts a cross section of top-Higgs production, then any enhancement of their associated production will be a clear signature of physics beyond the standard model. In addition, the existence of physics beyond the standard model can also be reflected by resonances that decay into a top-quark and a Higgs boson. In the first part of my work I describe the theoretical and experimental foundations of the standard model, as well as the experimental device. In the same theoretical chapter, I also discuss the formulation of an extension of the standard model. In addition, I describe a feasibility study of a search of one of the particles predicted by such model. The second part contains the realization of the search for a top partner, T_, within the CMS experiment. This top partner is a new particle very similar to the standard model top quark, but much heavier, that can decay into a top quark and a Higgs boson. The analysis looks for this particle in the full hadronic final state, where the Higgs boson decays into two b-quarks and the top quark decays into three standard model quarks, a b and two light quarks. In this channel, I reconstruct its mass from the identification of all its decay products. As a result of the analysis, I show the limits on the T_ production cross section from the number of observed events in the specific signature

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Köhler, Nicolas Maximilian [Verfasser], Oliver [Akademischer Betreuer] Kortner, Stephan [Gutachter] Paul, Oliver [Gutachter] Kortner, and Aleandro [Gutachter] Nisati. "Searches for the Supersymmetric Partner of the Top Quark, Dark Matter and Dark Energy at the ATLAS Experiment / Nicolas Maximilian Köhler ; Gutachter: Stephan Paul, Oliver Kortner, Aleandro Nisati ; Betreuer: Oliver Kortner." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1166315207/34.

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23

El, bakkali taheri Nadia. "Oxydase de l'acide 1-aminocyclopropane carboxylique : mode d'action et inactivation." Thesis, Aix-Marseille 3, 2011. http://www.theses.fr/2011AIX30042.

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L’oxydase de l’acide 1-AminoCyclopropane Carboxylique (ACC Oxydase, ACCO) catalyse la formation de l’éthylène, hormone essentielle à la vie des plantes. L’ACCO catalyse l’oxydation de l’ACC en éthylène en présence de dioxygène et de deux électrons (fournis in vitro par l’ascorbate). L'activité de l'enzyme requière également, pour des raisons encore incomprises, la présence de CO2 sous la forme d'ions bicarbonates. Il s’agit d’une enzyme qui contient un ion fer(II) dans un environnement non-hémique au site actif. Etant donné l’importance de l’éthylène chez les plantes, l’ACCO, ainsi que les autres enzymes impliquées dans sa biosynthèse, ont été très étudiées durant les vingt dernières années. Cependant, peu d’études ont porté sur le rôle de l’ion métallique et le mécanisme d’action ou sur les surprenants processus d’inactivation subis par l’enzyme. L’ACCO est en effet une enzyme connue pour son instabilité. Nous avons tout d’abord entrepris une caractérisation physicochimique et biochimique de l’enzyme. Le matériel protéique utilisé a tout d’abord été analysé une coupure entre les résidus Ala 290 et Gly 291 a été observée au cours de la purification de l'enzyme. Puis, grâce à l'utilisation de techniques spectroscopiques, nous avons cherché à obtenir plus d'informations sur la fixation des substrats/cofacteurs au site actif. Enfin l’étude des mutants et des complexes modèles de l’ACCO a été réalisée afin de mieux comprendre le mécanisme catalytique et de rechercher de nouvelles activités. Nous nous sommes aussi intéressés aux mécanismes d’inactivation de l’ACCO. En présence des effecteurs en excès, cette inactivation se traduit par une fragmentation et une modification de charge. Lorsque la concentration en fer est limitée, aucune modification physique de l’enzyme inactive n’est observée et l'enzyme garde un contenu global en aminoacide et une conformation tridimensionnelle intègres. Des processus oxydatifs se déroulant directement au site actif de l’enzyme sont susceptibles d’engendrer une telle perte d’activité par l'oxydation d'un nombre limité d'acides aminés. Des études en spectrométrie de masse ont été entreprises et sont toujours en cours afin d'identifier les modifications responsables de la perte d'activité de l'enzyme.Enfin nous avons recherché d’éventuelles partenaires protéiques qui pourraient conférer à l’ACCO une meilleure stabilité. Des études préliminaires ont été entreprises et des données de microscopie suggèrent que l'ACCO est localisée près des membranes de la vacuole The 1-AminoCyclopropane Carboxylic acid oxidase (ACC Oxidase, ACCO) catalyzes the last step of the biosynthesis of the plant hormone, ethylene. ACCO catalyzes the oxidation of ACC into ethylene in the presence of dioxygen and two electrons (provided in vitro by ascorbate). Carbon dioxide (or bicarbonate ions) are also required for optimum activity. ACCO is an non-heme iron(II) containing enzyme. Given the importance of ethylene in plants, studies on ACCO, as well as on the other enzymes involved in its biosynthesis, have attracted much attention in the past two decades. However, few studies focus on the role of the metal ion and on the catalytic mechanism or the intriguing inactivation processes. ACCO is indeed known for its instability. We first purified and characterised the enzyme. During the purification, a cleavage between residues Ala 290 and Gly 291 was observed. Then, using spectroscopic techniques, we intended to get more information on cofactor's binding in the active site. Finally studies of mutants and model complexes of ACCO were performed in order to get a better understanding of the catalytic mechanism and to look for new activities.We were also interested in the inactivation processes of ACCO. In the presence of an excess of effectors, this inactivation resulted in fragmentation and in pI modification. When the concentration of iron is limited, no modifications of the inactive enzyme were observed. The inactive enzyme maintained its amino acid content and three-dimensional conformation. The loss of activity is therefore likely to derive from oxidative processes directly at the active site. Mass spectrometry experiments were initiated and are still under progress. Finally we were interested in identifying possible protein partners of ACCO that could provide a better stability. Preliminary studies were thus initiated and from microscopy results, ACCO was found located close to the vacuole membrane

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Chiang, Jennifer. "In Search of Interaction Partners for the Saccharomyces cerevisiae Magnesium Channel Alr1p." Thesis, 2011. http://hdl.handle.net/1807/30564.

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Magnesium, the second most abundant cation in the cell, is involved in a diverse range of biochemical activities. This project focuses on the mechanism of magnesium import into the cell through the action of Alr1p. Alr1p resides in the plasma membrane of yeast and belongs to the CorA-Alr1p-Mrs2p family of magnesium channels. Potential regulators of CorA were found through genetic screening and yeast two-hybrid screens have pulled out interactors of Alr1p. Interactors that influence Alr1p and its conformation will, with very high probability, also change the channel’s ability for magnesium import. Membrane proteins are not easily amenable to traditional yeast two-hybrid screens due to their hydrophobic nature. The goal of this thesis is to identify interactors of Alr1p using iMYTH, a modified yeast two-hybrid method. Of the eighteen Alr1p interactors identified, Vma3p and Vma11p, which are both subunits of the V-ATPase, showed the most promise for further Alr1p interaction characterizations.

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Lasić, Maja [Verfasser]. "The yeast endosomal-, TGN-localized Ysl2p-Arl1p-Neo1p network : search for novel interaction partners / vorgelegt von Maja Lasić." 2008. http://d-nb.info/988929880/34.

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26

Ottenschläger, Iris [Verfasser]. "Gravity regulated differential auxin transport in Arabidopsis roots and the search for interaction partners of AtPIN1 / vorgelegt von Iris Ottenschläger." 2002. http://d-nb.info/964941848/34.

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27

Mendis, Dalath Rachitha Asanga. "Search for vector-like T quarks using events with oppositely-charged lepton pairs and jets in proton-proton collisions at centre-of-mass energy of 13 TeV with CMS detector." Diss., 2019. http://hdl.handle.net/2097/39443.

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Doctor of Philosophy Department of Physics Andrew G. Ivanov A search is performed for heavy vector-like top quark partner (T) with electric charge +2/3 by using proton-proton collision events from Large Hadron Collider (LHC) at a centre- of-mass energy of 13 TeV. The data corresponds to an integrated luminosity of 35.9fb−1 collected by the Compact Muon Solenoid (CMS) experiment during 2016. The production of this new hypothetical particle is assumed to be in pairs and strong interaction is responsible for such production mechanism. T quarks can decay to various combinations of third generation quarks and standard model bosons: T → bW, tZ, or tH, and hence the final states consist of pair of opposite-sign leptons consistent with coming from a Z boson and jets. No significant excess has been observed and hence 95% CL upper limits are obtained on TT production cross section by assuming different branching ratios. T quark mass values below 1280 GeV are excluded in case of 100% branching fraction for T → tZ.

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Richardson, Clint Allan. "A search for heavy fermionic top quark partners with charge 5/3 decaying to a pair of same-sign leptons with the CMS experiment." Thesis, 2017. https://hdl.handle.net/2144/27478.

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In the millennia of recorded human knowledge, no model for describing the workings of Nature is as elegant or complete as the Standard Model of Particle Physics (SM). However, the SM has several open questions and there exist multiple phenomena that it cannot explain. A pressing question is related to the mass of the Higgs boson, whose value the SM has no natural way of explaining, relying instead on the fine tuning of parameters to one part in 10^{28}. Many extensions of the SM propose new interactions and particles which solve this problem. A particularly common theme is that of new partners of the top quark, which in some models are fermionic and have vectorial couplings to the SM charged weak current. Such particles are referred to as vector-like quarks and represent a promising avenue of research. A search is presented for a vector-like quark with an exotic 5/3 charge (in units of the charge of the positron), referred to as an X5/3 particle. These particles are predicted in Composite Higgs theories, which rely on the masses of the X5/3 to be not more than ~2 TeV in order to solve the unnaturalness inherent in the mass of the Higgs boson. The search uses data collected by the CMS experiment in both 2015 and 2016 consisting of proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC. No significant excess of events is seen above the predicted background and limits are placed on the mass of the new top quark partner at 95% confidence level, excluding masses less than 1200 (1160) GeV for X5/3 particles that decay with right-handed (left-handed) couplings to W bosons. These are the most stringent limits to date on the mass of the X5/3 particle in this final state.

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Schmitt, Dominique. "Initial characterization of mouse Syap1 in the nervous system: Search for interaction partners, effects of gene knockdown and knockout, and tissue distribution with focus on the adult brain." Doctoral thesis, 2017. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-147319.

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The synapse-associated protein of 47 kDa (Sap47) in Drosophila melanogaster is the founding member of a phylogenetically conserved protein family of hitherto unknown molecular function. Sap47 is localized throughout the entire neuropil of adult and larval brains and closely associated with glutamatergic presynaptic vesicles of larval motoneurons. Flies lacking the protein are viable and fertile and do not exhibit gross structural or marked behavioral deficiencies indicating that Sap47 is dispensable for basic synaptic function, or that its function is compensated by other related proteins. Syap1 - the mammalian homologue of Sap47 - was reported to play an essential role in Akt1 phosphorylation in various non-neuronal cells by promoting the association of mTORC2 with Akt1 which is critical for the downstream signaling cascade for adipogenesis. The function of Syap1 in the vertebrate nervous system, however, is unknown so far. The present study provides a first description of the subcellular localization of mouse Syap1 in cultured motoneurons as well as in selected structures of the adult mouse nervous system and reports initial functional experiments. Preceding all descriptive experiments, commercially available Syap1 antibodies were tested for their specificity and suitability for this study. One antibody raised against the human protein was found to recognize specifically both the human and murine Syap1 protein, providing an indispensable tool for biochemical, immunocytochemical and immunohistochemical studies. In the course of this work, a Syap1 knockout mouse was established and investigated. These mice are viable and fertile and do not show obvious changes in morphology or phenotype. As observed for Sap47 in flies, Syap1 is widely distributed in the synaptic neuropil, particularly in regions rich in glutamatergic synapses but it was also detected at perinuclear Golgi-associated sites in certain groups of neuronal somata. In motoneurons the protein is especially observed in similar perinuclear structures, partially overlapping with Golgi markers and in axons, dendrites and axonal growth cones. Biochemical and immunohistochemical analyses showed widespread Syap1 expression in the central nervous system with regionally distinct distribution patterns in cerebellum, hippocampus or olfactory bulb. Besides its expression in neurons, Syap1 is also detected in non-neuronal tissue e.g. liver, kidney and muscle tissue. In contrast, non-neuronal cells in the brain lack the typical perinuclear accumulation. First functional studies with cultured primary motoneurons on developmental, structural and functional aspects reveal no influence of Syap1 depletion on survival and morphological features such as axon length or dendritic length. Contrary to expectations, in neuronal tissues or cultured motoneurons a reduction of Akt phosphorylation at Ser473 or Thr308 was not detected after Syap1 knockdown or knockout Das Synapsen-assoziierte Protein von 47 kDa (Sap47) in Drosophila melanogaster ist das Gründungsmitglied einer phylogenetisch konservierten Proteinfamilie von unbekannter molekularer Funktion. Sap47 ist im gesamten Neuropil des adulten und larvalen Gehirns lokalisiert und mit glutamatergen, präsynaptischen Vesikeln in larvalen Motoneuronen assoziiert. Fliegen, denen das Protein fehlt, sind lebensfähig und fruchtbar und weisen keine schwerwiegenden strukturellen oder ausgeprägten verhaltensbezogenen Defizite auf, was darauf hinweist, dass Sap47 für eine basale synaptische Funktion entbehrlich ist beziehungsweise das Fehlen seiner Funktion durch andere, eventuell verwandte Proteine, kompensiert werden kann. Über Syap1 - das Säugetierhomolog von Sap47 - wurde berichtet, dass es in verschiedenen nicht-neuronalen Zellen eine essentielle Rolle in der Akt1 Phosphorylierung spielt, indem es die Assoziation von mTORC2 und Akt1 begünstigt, welche für den nachgeschalteten Signalweg bei der Adipogenese essentiell ist. Die Funktion von Syap1 im Vertebraten-Nervensystem ist dagegen bislang unbekannt. Die vorliegende Studie liefert die Erstbeschreibung von neuronalem Syap1 über die subzelluläre Lokalisation des Proteins in kultivierten Motoneuronen sowie die Verteilung in ausgewählten Strukturen des adulten Nervensystems der Maus und beschreibt initiale funktionelle Experimente. Allen beschreibenden Experimenten voran, wurden kommerziell erhältliche Syap1 Antikörper auf ihre Spezifität und Tauglichkeit für diese Studie getestet. Einer der Antikörper, der gegen das humane Protein hergestellt wurde, erkennt spezifisch sowohl das humane, als auch das murine Syap1 Protein und stellt somit ein unentbehrliches Werkzeug für alle biochemischen, immunzytochemischen und immunhistochemischen Untersuchungen dar. Im Zuge der Arbeit wurde eine Syap1-Knockout Maus untersucht, welche vital und fruchtbar ist und keine offensichtlichen Veränderungen in ihrem morphologischen Phänotyp aufweist. Wie auch Sap47 in Fliegen, ist Syap1 im synaptischen Neuropil weit verbreitet, insbesondere in Regionen, die reich an glutamatergen Synapsen sind, aber es wurde auch in einer deutlichen, Golgi-assoziierten Akkumulation in bestimmten Gruppen neuronaler Zellkörper beobachtet. In Motoneuronen wurde das Protein besonders in ähnlichen perinukleären Strukturen detektiert, welche zum Teil mit Golgi Markern überlappen und zudem in Axonen, Dendriten und Wachstumskegeln detektiert. Wie biochemische und immunhistochemische Untersuchungen ergaben, zeigt das Syap1 Protein eine weit verbreitete Expression im zentralen Nervensystem mit Regionen-spezifischem Verteilungsmuster wie es beispielsweise im Kleinhirn, dem Hippocampus oder dem olfaktorischen Bulbus beobachtet wurde. Neben der Expression in Neuronen wurde Syap1 auch in nicht neuronalen Geweben wie der Leber, Niere und im Muskel detektiert. Nicht-neuronalen Zellen im Gehirn fehlte dagegen die typische perinukleäre Akkumulation in immunhistochemischen Färbungen. Erste funktionelle Studien mit kultivierten primären Motoneuronen über entwicklungsbezogene, strukturelle und funktionelle Gesichtspunkte ergaben keinen Einfluss einer Syap1 Depletion auf das Überleben oder morphologische Merkmale wie Axon- oder Dendritenlänge. Entgegen den Erwartungen, wurde nach Syap1 Knockdown oder Knockout in neuronalem Gewebe oder kultivierten Motoneuronen keine Reduktion in der Akt1 Phosphorylierung an Ser473 oder Thr308 detektiert

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"A search for the lightest supersymmetric partner of the top quark at DO." Thesis, 2010. http://hdl.handle.net/1911/62217.

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We report the result of a search for the pair production of the light supersymmetric partner of the top quark (t&tilde;1) in 5.4+/-0.3 fb-1 of data from the DO detector at a pp¯ center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider. The scalar top quarks are assumed to decay into a b quark, a charged lepton and a scalar neutrino ( n&d5; ), and the search is performed in the electron plus muon final state. No significant excess of events above the standard model prediction is detected and new exclusion limits at the 95% C.L. are set for a portion of the ( mt&d5;1,m n&d5; ) mass plane.

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Wu, Guan Wei, and 吳冠緯. "Top partner search in T to tZ channel of Minimal Composite Higgs Model at the LHC." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/62127351802057768830.

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碩士 國立清華大學 物理系 103 We all know the Standard Model cannot describe all phenomena emerging from modern experiments. Apparently, it must exists a Beyond Standard Model which can satisfy some or all phenomena. In the beginning, we at- tempt to solve the Hierarchy problem which has disturbed at the physicist so far. In brief, that means we are able to find one new particle at least on TeV energy scale at the Large Hadron Collider (LHC). Following the Minimal Composite Higgs Model (MCHM), it bases on a large symmetry SO(5)/SO(4) in strong dynamic sector above electroweak scale v. Therefore, it predicts heavy fermionic quarks (top partners) at the TeV energy order. We apply several analysis tools, such as Feynrule, Mad- graph 5, and MadAnalysis 5, doing simulations for those extra fermionic quarks at 14 TeV and luminosity equals to 300fb−1. For illumination, we use ”Singlet T Model”, which only remains a charge 2/3 top partner mixing with Standard Model by Yukawa interaction. Fur- thermore, we employ a model independent framework, which can apply in any models with extra vector-like quarks, as simplified model approach. For instance, you can use the model independent framework in Little Higgs Model (LHM) with T parity. As we know that the Singlet T Model is the most simplest case in MHCM. However, There are still a number of ways to assign the representation and the interaction between the different charge of vector-like quarks. It is totally beyond this work and others group have done a few researches. As a result, we will represent the probability to discover the new state in T → tZ channel.

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Dissertationen zum Thema „Partners search“

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