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Опубліковано: 14 березня 2023

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Статті в журналах з теми "Higgs potential"

1

SOPCZAK, ANDRÉ. "HIGGS BOSON DISCOVERY POTENTIAL BEYOND THE MINIMAL STANDARD MODEL." International Journal of Modern Physics A 09, no. 11 (April 30, 1994): 1747–85. http://dx.doi.org/10.1142/s0217751x94000753.

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Анотація:
Detailed studies of neutral and charged Higgs boson pair production with full statistic detector simulations around [Formula: see text] with 500 pb−1 are presented in the context of a review of the Higgs boson discovery potential at LEP200. Already in the first phase of LEP200, a significant increase of the mass parameter space compared to LEP1 for the discovery of nonminimal Higgs bosons will be possible, while the mass range for the discovery of the minimal Standard Model Higgs boson will increase only marginally. The requirements for a decisive test of the Minimal Supersymmetric extension of the Standard Model (MSSM) at a later stage of LEP200 are discussed. A sensitivity mass range is given for charged Higgs bosons.
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2

Jora, Renata. "Standard Model Effective Potential from Trace Anomalies." Advances in High Energy Physics 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/5294394.

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By analogy with the low energy QCD effective linear sigma model, we construct a standard model effective potential based entirely on the requirement that the tree level and quantum level trace anomalies must be satisfied. We discuss a particular realization of this potential in connection with the Higgs boson mass and Higgs boson effective couplings to two photons and two gluons. We find that this kind of potential may describe well the known phenomenology of the Higgs boson.
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3

Gies, Holger, and René Sondenheimer. "Renormalization group flow of the Higgs potential." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 376, no. 2114 (January 22, 2018): 20170120. http://dx.doi.org/10.1098/rsta.2017.0120.

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We summarize results for local and global properties of the effective potential for the Higgs boson obtained from the functional renormalization group, which allows one to describe the effective potential as a function of both scalar field amplitude and renormalization group scale. This sheds light onto the limitations of standard estimates which rely on the identification of the two scales and helps in clarifying the origin of a possible property of meta-stability of the Higgs potential. We demonstrate that the inclusion of higher-dimensional operators induced by an underlying theory at a high scale (GUT or Planck scale) can relax the conventional lower bound on the Higgs mass derived from the criterion of absolute stability. This article is part of the Theo Murphy meeting issue ‘Higgs cosmology’.
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4

Greco, Mario. "Physics potential and motivations for a muon collider." International Journal of Modern Physics A 31, no. 18 (June 29, 2016): 1630028. http://dx.doi.org/10.1142/s0217751x16300283.

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Анотація:
The discovery of the Higgs particle is demanding a detailed knowledge of the properties of this fundamental component of the Standard Model. From the available data however, it cannot be concluded yet that we have found the SM Higgs boson and not one of the scalars postulated within the possible extensions of the SM. It is shown that a Higgs factory through a muon collider is particularly appropriate for precision studies of the properties of this particle. However sizable QED radiative effects — of order of 50% — must be carefully taken into account for a precise measurement of the leptonic and total widths of the Higgs particle. The results presented here are mainly based on a recent work in collaboration of Tao Han and Zhen Liu.
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5

Melo, Ivan. "Higgs potential and fundamental physics." European Journal of Physics 38, no. 6 (October 24, 2017): 065404. http://dx.doi.org/10.1088/1361-6404/aa8c3d.

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6

Quadri, A. "Higgs potential from derivative interactions." International Journal of Modern Physics A 32, no. 16 (June 2017): 1750089. http://dx.doi.org/10.1142/s0217751x17500890.

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Анотація:
A formulation of the linear [Formula: see text] model with derivative interactions is studied. The classical theory is on-shell equivalent to the [Formula: see text] model with the standard quartic Higgs potential. The mass of the scalar mode only appears in the quadratic part and not in the interaction vertices, unlike in the ordinary formulation of the theory. Renormalization of the model is discussed. A nonpower-counting renormalizable extension, obeying the defining functional identities of the theory, is presented. This extension is physically equivalent to the tree-level inclusion of a dimension-six effective operator [Formula: see text]. The resulting UV divergences are arranged in a perturbation series around the power-counting renormalizable theory. The application of the formalism to the Standard Model in the presence of the dimension-six operator [Formula: see text] is discussed.
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7

Dehnen, H., and H. Frommert. "Scalar gravity and Higgs potential." International Journal of Theoretical Physics 29, no. 4 (April 1990): 361–70. http://dx.doi.org/10.1007/bf00674437.

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8

Trinhammer, Ole L. "Dark energy from Higgs potential." EPL (Europhysics Letters) 130, no. 2 (June 1, 2020): 29002. http://dx.doi.org/10.1209/0295-5075/130/29002.

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9

Haba, Naoyuki, Shigeki Matsumoto, Nobuchika Okada, and Toshifumi Yamashita. "Effective Potential of Higgs Field in Warped Gauge-Higgs Unification." Progress of Theoretical Physics 120, no. 1 (July 2008): 77–98. http://dx.doi.org/10.1143/ptp.120.77.

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10

Yan, Qi-Shu. "Probe Higgs potential via multi-Higgs boson final states at hadron colliders." International Journal of Modern Physics A 31, no. 33 (November 22, 2016): 1644010. http://dx.doi.org/10.1142/s0217751x16440103.

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Анотація:
I summarize some results related with the determination of the Higgs potential, including a hadron-level Monte Carlo study of the sensitivity of Higgs boson pair production via the [Formula: see text] channel with the final state [Formula: see text] and the sensitivity study on the triple Higgs boson final state via [Formula: see text] in a 100 TeV collider.
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Більше джерел

Дисертації з теми "Higgs potential"

1

Hamada, Yuta. "Higgs potential and naturalness after the Higgs discovery." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215312.

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2

Knechtli, Francesco. "The Static Potential in the SU(2) Higgs Model." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 1999. http://dx.doi.org/10.18452/14373.

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Анотація:
In meiner Doktorarbeit habe ich das Potential zwischen zwei statischen Quarks in der Confinement ``Phase'' des SU(2) Higgs Modells untersucht. Statische Quarks sind externe Quellen in der fundamentalen Darstellung der Eichgruppe. In reinen nicht-Abelschen Eichtheorien w\"achst das Potential zwischen einem statischen Quark und einem statischen Anti-quark (statisches Potential genannt) linear mit dem Abstand zwischen den Quarks. Dieses Verhalten des Potentials wird lineares Confinement genannt und wurde mit Gittersimula tionen bis zu grossen Abst\"anden und nahe am Kontinuumslim es beobachtet. Wenn dynamische Materiefelder vorhanden sind, wird erwartet, dass das statische Potential bei grossen Abst\"anden abflacht: Der Grund ist die Abschirmung der statischen Quarks durch Paarerzeugung von leichten Quark Anti-quark Paaren. Die Abflachung des statischen Potentials nennt man String Breaking. Der Stand der Dinge am Anfang meiner Doktorarbeit war, dass String Breaking in nicht-Abelschen Eichtheorien mit Materiefeldern noch nicht beobachtet wurde. Im Gegenteil, die Gittersimulationen von QCD mit dynamischen Fermionen zeigten (und zeigen noch) einen linearen Zuwachs des Potentials bei Abst\"anden, wo das String Breaking eigentlich erwartet wird (aus einer Sch\"atzung in der quenched Approximation der QCD). Die Confinement ``Phase'' im SU(2) Higgs Modell hat Eigenschaften, die der QCD \"ahnlich sind, insbesondere wird das String Breaking erwartet. Deswegen ist die Bestimmung des statischen Potentials im SU(2) Higgs Modell eine wichtige Untersuchung der relevanten Eigenschaften des String Breaking Ph\"anomens. Ich habe das SU(2) Higgs Modell in der Confinement ``Phase'' auf dem Gitter simuliert: Die Resultate zeigen deutlich das String Breaking. Desweiteren kann auch das erste angeregte statische Potential bestimmt werden. Der entscheidende Punkt sind die Korrelationen, die man benutzt, um das statische Potential zu bestimmen. In der reinen Eichtheorie wird das statische Potential aus den Wilson Loops bestimmt, die den ``String Zustand'' des Eichfeldes gut beschreiben. String steht hier f\"ur die Eichfeldkonfiguration, die das lineare Confinement der Quarks verursacht. In Anwesenheit von Materiefeldern erwartet man, dass bei grossen Abst\"anden das statische Pot ential durch das Potential zwischen zwei statisch- leichten Mesonen (Bindungszust\"anden eines statischen Quarks mit dem dynamischen leichten Quarkfeld) beschrieben wird. Die Methode, die ich verwendet habe, um das statische Potential zu bestimmen, basiert auf eine Mischung von ``String-'' und ``Zwei-Meson Zust\"anden''. Mit einem Variationsprinzip wird die beste lineare Kombination solcher ``Zust\"anden'' bestimmt, welche die Eigenzust\"ande des Hamiltonoperators approximiert. Dank der Bestimmung des ersten angeregten Potentials, konnte auch die Interpretation des String Breakings als Level Crossing Ph\"anomen zwischen ``String'' und ``Meson Zust\"anden'' best\"atigt werden. In dem zweiten Teil meiner Doktorarbeit habe ich die Frage des ``Kontinuumlimes'' untersucht. Das String Breaking wurde f\"ur einen speziellen Satz von Parametern beobachtet: die Frage war, wie stark diese Resultate vom gew\"ahlten Gitterabstand abh\"angig sind (Cutoff-Effekte). Diese Frage f\"uhrt unmittelbar zur Untersuchung von Linien konstanter Physik im Parameterraum des SU(2) Higgs Modells. Obwohl in m einer Arbeit noch keine definitive Methode gefunden worden ist, um diese Linien zu konstruieren, konnte ich das Skalierungsverhalten der statischen Potentiale bei Variation des Gitterabstandes um einen Faktor zwei untersuchen. Die Resultate zeigen \"uberraschend kleine Cutoff-Effekte! Die M ethode, welche ich in meiner Arbeit verwendet habe, ist auch in der QCD zu verwenden, um das String Breaking zu beobachten.
The static potential in the confinement ``phase'' of the SU(2) Higgs model is studied. In particular, the observation of the screening (called {\em string breaking}) of the static quarks by the dynamical light quarks leading to the formation of two static-light mesons was not observed before my work in non-Abelian gauge theories. The tool that I employ is lattice gauge simulation. The observable from whic h the spectrum of the Hamiltonian in presence of two static quarks can be extracted, is a matrix correlation whose elements are constructed not only from string-type states represented by Wilson loops (like in pure gauge theories). Additional matrix elements representing transitions from string-type to meson-type states and the propagation of meson-type states are taken into account. From this basis of states it is possible to extract the ground state and first excited state static potentials employing a variational method. The crossing of these two energy levels in the string breaking region is clearly visible and the inadequacy of the Wilson loops alone can be demonstrated. I also address the question of the lattice artifacts. For this purpose lines of constant physics in the confinement ``phase'' of the model have to be constructed. This problem has only partially been solved. Nevertheless it is possible to show that the static potentials have remarkable scaling properties under a variation of the lattice spacing by a factor two and are almost independent of the quartic Higgs coupling.
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3

Mahboubi, Kambiz. "ATLAS level-1 jet trigger rates and study of the ATLAS discovery potential of the neutral MSSM Higgs bosons in b-jet decay channels." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=961739746.

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4

Varouchas, Dimitris. "Study of the Higgs boson discovery potential, produced by the vector boson fusion with the ATLAS detector and commissioning of calorimetric transverse missing energy." Paris 11, 2009. http://www.theses.fr/2009PA112217.

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Анотація:
Le but de cette thèse est d'évaluer le potentiel de découverte par le détecteur ATLAS au LHC du boson de Higgs du MS. Le mode de production étudié est défini par la fusion de bosons vecteurs (VBF) suivie de la désintégration en une paire de leptons τ (H->τ). C'est l'un des canaux de découverte les plus prometteurs pour un boson de Higgs de basse masse, qui est favorisé par les mesures de précision dans le secteur électro-faible. La topologie caractéristique de VBF, qui est constituée des deux jets vers l'avant du détecteur et des produits de désintégration de boson de Higgs dans la région centrale, fournit une signature unique permettant la suppression du bruit de fond. En outre, puisque le VBF est un processus purement électro-faible, aucune activité de QCD n'est prévue et donc aucun jet central n'est attendu. Ceci permet l'application de la coupure de «central jet veto» pour encore réduire le bruit de fond. Une analyse basée sur des coupures a été utilisée, se concentrant sur l'optimisation de la coupure de «central jet veto». L'objectif principal était d'étudier le potentiel de découverte du boson de Higgs avec ATLAS,sous une luminosité intégrée de 30 fb-1 dans la gamme de masse mH=(115,140) GeV pour une énergie au centre de la masse of 14 TeV. Après l'application des coupures, un excès au-dessus de 5ƒb-1 de signal significance a été est trouvé pour la gamme de masse mH=(115,125). Pour le canal H->ττ, la résolution de l'énergie transverse manquante (ETmiss ) est importante puisqu'elle affecte directement la résolution sur la masse du boson de Higgs. Cela a été la motivation initiale pour réaliser et présenter dans cette thèse une étude de «commissioning» calorimétrique basée sur les quantités ETmiss , plus particulièrement sur la contribution du bruit de l' électronique, mesurée dans des événements cosmiques. Un comportement gaussien de bruit dans tous les calorimètres de l'argon liquide a été trouvé, tandis qu'un comportement non-gaussien dans une partie du calorimètre a tuile scintillante du a un bruit cohérent, a été observé. Pour ce dernier, un nouveau modèle de bruit a été examiné utilisant une paramétrisation de double gaussienne ayant pour résultat une description plus réaliste
The subject of this thesis is the evaluation of the discovery potential of the ATLAS detector at the LHC for the SM Higgs boson in vector boson fusion (VBF) production and a subsequent decay into a τ-lepton pair (H->ττ). This is one of the most promising discovery channels in the low mass range, which is the mass range favored from precision measurements of the electroweak interaction. The characteristic VBF topology, which consists of two jets in the forward regions of the detector and the Higgs boson decay products in the central region, provides a unique signature allowing the suppression of background. In addition, since VBF is a purely electroweak process, no QCD activity is expected and thus no central jets are expected. This allows the central jet veto cut application to further reject background processes. A cut-oriented analysis was used, focusing on the central jet veto cut optimization. The main objective was to investigate the Higgs boson ATLAS discovery potential with an integrated luminosity of 30 fb-1 in the mass range mH=(115,140) GeV, for an LHC energy at the center of mass of 14 TeV. After the application of all cuts, an excess above 5σ of signal signifcance was found for the mass range mH=(115,125). In H->ττ decay channel, transverse missing energy (ETmiss) resolution is of high importance since it affects directly the resolution of the Higgs boson mass. This was the initial motivation for performing and presenting in this thesis a calorimetric commissioning study based on ETmiss quantities, focused on the electronics noise ETmiss contribution, measured with cosmics data of the period fall 2008. A Gaussian behavior of noise in all liquid argon calorimeters was found, whereas a region of non-Gaussian tails in scintillating tile calorimeter due to a coherent noise, was high-lighted. For the latter, a new noise model was tested using a double Gaussian parameterization resulting in a more realistic description
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5

Schaarschmidt, Jana. "The Discovery Potential of Neutral Supersymmetric Higgs Bosons with Decay to Tau Pairs at the ATLAS Experiment." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-67270.

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Анотація:
This work presents a study of the discovery potential for the neutral supersymmetric Higgs bosons h/A/H decaying to tau pairs with the ATLAS experiment at the LHC. The study is based on Monte Carlo samples which are scaled to state-of-the-art cross sections. The analyses are designed assuming an integrated luminosity of 30 1/fb and a center-of-mass energy of sqrt(s) = 14 TeV. The results are interpreted in the mmax h benchmark scenario. Two final states are analyzed: The dileptonic channel where the two tau leptons decay to electrons or muons and the lepton-hadron channel where one tau decays to an electron or muon and the other tau decays to hadrons. The study of the dilepton channel is based completely on the detailed ATLAS simulation, the analysis of the lepton-hadron channel is based on the fast simulation. The collinear approximation is used to reconstruct the Higgs boson mass and its performance is studied. Cuts are optimized in order to discriminate the signal from background and to maximize the discovery potential given a certain Higgs boson mass hypothesis. In the lepton-hadron channel the selection is split into two analyses depending on the number of identified b-jets. Procedures to estimate the dominant backgrounds from data are studied. The shape and normalization of the Z to tautau background are estimated from Z to leptonlepton control regions. The ttbar contributions to the signal regions are estimated from ttbar control regions. The individual analyses are combined and sensitivity predictions are made depending on the Higgs boson mass mA and the coupling parameter tanβ. The light neutral MSSM Higgs bosons with mA = 150 GeV can be discovered when at least tanbeta = 11 is realized in nature. The heavy neutral MSSM Higgs bosons with mA = 800 GeV can be discovered for tanbeta ≥ 44. However, due to the large width of the reconstructed Higgs boson mass and the mass degeneration, only the sum of at least two of the three Higgs boson signals will be visible.
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6

Dosil, Bonmatí Mireia. "Discovery potential and mass measurement of a MSSM charged Higgs produced in top decays with the ATLAS detector." Doctoral thesis, Universitat Autònoma de Barcelona, 2003. http://hdl.handle.net/10803/3348.

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Анотація:
La observació de un o varis bosons de Higgs és fonamental a l'hora d'entendre el trencament espontani de simetria del Model Estàndard (SM). En aquest model, un doblet escalar és el que proporciona el trencament espontani de simetria donant un bosó de Higgs.
No obstant, el Model Estàndard té alguns problemes que són difícils de solucionar. Aquest tipus de problemes troben solució en les teories Supersimètriques (SUSY). El Minimal Supersymmetric Standard Model (MSSM) és l'extensió supersimètrica més simple del Model Estàndard. El sector de Higgs del MSSM està format per 2 doblets de Higgs que donen 5 bosons de Higgs després del trencament espontani de simetria: 3 bosons neutres (h, H, A) i un parell carregat (H+ ,H-).
El descobriment d'un bosó de Higgs carregat (H±) seria una senyal clara de nova física més enllà del Model Estàndard. Els bosons de Higgs carregats es podrien produir en grans quantitats al LHC (Large Hadron Collider) en el decaiment del quark top. En aquesta tesi, la sensitivitat del detector ATLAS en condicions de baixa lluminositat al descobriment del Higgs carregat és estudiada en detall fent ús del canal: amb i .
Després d'aplicar talls cinemàtics a les diferents mostres (senyal i fons) d'esdeveniments, el fons més rellevant és el format per amb un bosó W desintegrant-se en tn i l'altre desintegrant-se hadrònicament donant un parell de jets lleugers. Aquest fons va poder ser reduït imposant un tall a la massa transversa i en el moment transvers del leptó t: degut a la polarizació del t, en els casos en que el t decau hadrònicament en una partícula carregada, aquells jets de t que provenen de la desintegració del H± tenen un moment més gran que els que provenen de la desintegració del W±.
El potencial de descoberta del detector ATLAS per a un Higgs carregat produït en la desintegració del quark top ja va ser estudiat en ATLAS amb W± desintegrant-se leptònicament (mnm o ene). Els estudis de significància presentats en aquesta tesi completen els anàlisis efectuats en el pla del MSSM (mA, tanb) per la descoberta del Higgs carregat. En la regió fins ara no coberta al voltant de tanb 5-10, s'obté una significància superior a 5s per 10 fb-1 de dades (que correspon a un any funcionant a baixa lluminositat) amb el canal estudiat en aquest treball. Amb això, la combinació els estudis de potencial de descoberta dels detectors ATLAS i CMS pels diferents bosons de Higgs (h, H, A, H+, H-) cobreixen tot l'espai (mA, tanb) del MSSM.
A més a més, una característica important d'aquest canal és permet mesurar la massa. La massa del Higgs cargado del MSSM ha sigut obtinguda a partir de la distribució de la massa transversa mitjançant un mètode de màxima versemblança. L'error associat a aquesta mesura està completament dominat pels efectes sistemàtics i la precisió relativa obtinguda amb aquest mètode per la mesura de la massa és d'un 4% per una lluminositat integrada de 10 fb-1.
La observación de uno o varios bosones de Higgs es fundamental para entender la rotura espontánea de simetría del Modelo Estándar (SM). En este modelo, un doblete escalar es el que proporciona la rotura espontánea de simetría dando lugar a un bosón de Higgs.
Sin embargo, el Modelo Estándar tiene algunos problemas difíciles de solucionar. Esta clase de problemas hallan solución en teorías Supersimétricas (SUSY). El Minimal Supersymmetric Standard Model (MSSM) es la extensión supersimétrica más simple del Modelo Estándar. El sector de Higgs del MSSM está formado por dos dobletes de Higgs dando lugar a 5 bosones de Higgs después de la rotura espontánea de simetría: 3 bosones neutros (h, H, A) y un par cargado (H+, H-).
El descubrimiento del bosón de Higgs cargado (H±) sería una señal clara de nueva física más allá del Modelo Estándar. Los bosones de Higgs cargados podrían producirse copiosamente en el LHC (Large Hadron Collider) en la desintegración del quark top. En esta tesis, la sensitividad del detector ATLAS en condiciones de baja luminosidad al descubrimento del Higgs cargado es estudiada en detalle mediante el canal: con y .
Después de aplicar cortes cinemáticos a las distintas muestras de señal y fondo, los sucesos de fondo de tipo con un bosón W desintegrándose en tn y el otro desintegrándose hadrónicamente són todavía importantes. Este fondo pudo ser reducido imponiendo cortes en la masa transversa del H± y en el momento transverso del leptón t: debido a la polarización del t, cuando éste se desintegra hadrónicamente en una partícula cargada, los jets de t que provienen de la desintegración del H± tienen un momento superior a los que provienen de la desintegración del W±.
El potencial de descubrimiento del detector ATLAS para un Higgs cargado producido en la desintegración del quark top ya fue estudiado en ATLAS con W± desintegrándose leptónicamente (mnm o ene). Los estudios de significancia presentados en esta tesis completan los análisis efectuados en el plano del MSSM (mA, tanb) para el descubrimiento del Higgs cargado. En la región no cubierta hasta ahora alrededor de tanb 5-10, se obtiene una significancia superior a 5s para 10 fb-1 de datos (que corresponde a un año funcionando a baja luminosidad) con el canal estudiado en esta tesis. Es por eso que la combinación de los estudios de potencial de descubrimiento de los detectores ATLAS y CMS para los distintos bosones de Higgs (h, H, A, H+, H-) cubren todo el espacio (mA, tanb) del MSSM.
Además, una característica importante de este canal es que permite medir la masa. La masa del Higgs cargado del MSSM se ha obtenido a partir de la distribución de la masa transversa utilizando un método de máxima verosimilitud. El error asociado a esta medida está completamente dominado por los efectos sistemáticos y la precisión relativa para la medida de la masa que se obtiene con este método es de un 4% para una luminosidad integrada de 10 fb-1.
The observation of one or several Higgs bosons will be of capital importance in order to understand the electroweak symmetry breaking mechanism. In the Standard Model (SM), one scalar doublet is responsible for the electroweak symmetry breaking giving as a result only one Higgs boson.
However, the SM has serious drawbacks which are difficult to solve within the theory itself. This problems find a solution in Supersymmetric (SUSY) models. The Minimal Supersymmetric Standard Model (MSSM) is the simplest SUSY extension of the SM. The MSSM Higgs sector is made of two Higgs doublets which lead to five Higgs particles after electroweak symmetry breaking: three neutral (h, H, A) and a charged pair (H+ ,H-).
The discovery of the MSSM charged Higgs (H±) would be a clear sign of new physics beyond the SM. MSSM charged Higgs could be copiously produced at the LHC (large Hadron Collider) in top decays. In the present thesis, the sensitivity of the ATLAS detector to the discovery of the charged Higgs in the low luminosity running conditions is studied in detail in the channel with and .
After event selection, the most relevant remaining background is with one W boson decaying into tn and the other decaying hadronically in two light jets. That background was further reduced by imposing a cut on the transverse mass and a harder cut on the t jet transverse momentum: due to t polarization effects, in one-prong t hadronic decays, t jets from H± decay are harder than the ones produced in W± decay.
The discovery potential of the ATLAS detector for a charged Higgs produced in top decays was already studied in ATLAS with the W± decaying leptonically (mnm or ene). The significance studies presented in this thesis complete the (mA, tanb) survey for the MSSM charged Higgs. Furthermore, in the so far uncovered 5-10 tanb region a significance greater than 5s is obtained for 10 fb-1 of data (corresponding to one year of running at low luminosity) with the channel studied in this work. Therefore, the discovery potential studies of ATLAS standalone and ATLAS+CMS combined for any of the different MSSM Higgs bosons (h, H, A, H+, H-) cover the whole MSSM (mA, tanb) space.
Moreover, an important aspect of this channel is that it gives the possibility to measure the mass. The light MSSM charged Higgs mass was obtained from the transverse mass distribution (since in the channel there is no resonance peak) by means of a maximum likelihood method and the expected precision on this mass was also given. The error was completely dominated by systematics and a precision close to 4% could be achieved for an integrated luminosity of 10 fb-1.
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Bernius, C. "Investigation of the discovery potential of a Higgs boson in the tt̄H⁰, H⁰→bb̄ channel with the ATLAS experiment." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/757393/.

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The production of a light Standard Model Higgs boson in association with a top-quark pair at the Large Hadron Collider (LHC) is studied in a simulation of the multipurpose ATLAS experiment. The Higgs boson is assumed to decay into a b\bar{b} pair, and the top-quark pair to decay semi-leptonically. The main background process for this channel is the production of t\bar{t} events, which can be divided into reducible and irreducible components. In the process of generating these components separately, an overlap of events is created through the addition of b-quarks to t\bar{t} events via parton showering in the t\bar{t}X sample. These events are already included in the matrix-element cross-section calculation for the t\bar{t}b\bar{b} sample. A new procedure for the overlap removal is presented in this thesis. Two analyses are studied, where one aims at the full reconstruction of the nal state using a cut-based approach. Recently, this way of reconstructing the t\bar{t}H^{o}(H^{o}\rightarrow b\bar{b}) process has been found to be extremely challenging. The other analysis is based on a new method employing state-of-the-art jet reconstruction and decomposition techniques where the t\bar{t} pair and the Higgs boson are required to have large transverse momenta and can therefore be reconstructed as massive Higgs and top jets. A recent phenomenological study has shown that the t\bar{t}H^{o} process can be recovered as a promising search channel for a low mass Standard Model Higgs boson around 120 GeV using this approach. Finally, to enhance the sensitivity of the t\bar{t}H^{o} channel, a combination of the two analyses is presented.
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8

Dedes, Georgios. "Study of the Higgs Boson discovery potential in the process pp - H/A - my + my - / tau + tau - with the ATLAS detector." kostenfrei, 2008. http://mediatum2.ub.tum.de/doc/645838/645838.pdf.

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9

Hollyman, Graham Frederick. "Study of the ATLAS detector track trigger performance and of the potential for the WH > (lv) (bb) search for a light Higgs boson." Thesis, Royal Holloway, University of London, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415350.

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Siebel, Anca-Mirela [Verfasser]. "Study of the Potential of the ATLAS Detector to Observe a Higgs Decay into t¯t in the Fully Hadronic Decay Mode / Anca-Mirela Siebel." Wuppertal : Universitätsbibliothek Wuppertal, 2013. http://d-nb.info/1037091159/34.

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Книги з теми "Higgs potential"

1

Hamada, Yuta. Higgs Potential and Naturalness After the Higgs Discovery. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3418-3.

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Hamada, Yuta. Higgs Potential and Naturalness After the Higgs Discovery. Springer, 2017.

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Hamada, Yuta. Higgs Potential and Naturalness After the Higgs Discovery. Springer, 2018.

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4

Kachelriess, Michael. Symmetries and symmetry breaking. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198802877.003.0013.

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The spontaneous breaking of symmetries (SSB) is discussed for global symmetries and Goldstones theorem is derived. The renormalisation of theories with SSB is studied using the effective potential. Then SSB is applied to the Abelian Higgs model, both on the classical and quantum level.
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Частини книг з теми "Higgs potential"

1

Hamada, Yuta. "Dark Matter and Higgs Potential." In Springer Theses, 65–77. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3418-3_5.

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2

Kretzschmar, Linn. "Leveraging the Economic Potential of FCC’s Technologies and Processes." In The Economics of Big Science, 85–91. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-52391-6_12.

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Abstract An international consortium of more than 150 organizations worldwide is studying the feasibility of various future particle colliders to expand our understanding of the inner workings of the Universe. At the core of the Future Circular Collider (FCC) study is the design of a 100 km long circular particle collider infrastructure that could extend CERN’s current accelerator complex with an integral research program that spans 70 years. The first step would be an intensity-frontier electron-positron collider allowing to study with precision the Higgs couplings with many of the Standard Model particles and search with high-precision for new physics while the ultimate goal is to build a proton collider with a c.m.s collision energy seven times larger than the Large Hadron Collider. Hosted in the same tunnel and profiting from the new infrastructure, FCC-hh would allow to explore a new energy regime where new physics may be at play.
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3

Yagdjian, Karen, and Andras Balogh. "The Maximum Principle and Sign-Changing Solutions of the Klein–Gordon Equation with the Higgs Potential in the de Sitter Spacetime." In Trends in Mathematics, 379–88. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04459-6_36.

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4

Hardon, Anita. "Chemical Highs." In Critical Studies in Risk and Uncertainty, 43–79. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57081-1_2.

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Abstract Chemical Highs looks at how young people themselves develop and share with their peers a multitude of ways to maximize the pleasures and minimize the risks involved in getting high, an empowering practice that we refer to as “harm reduction from below.” Ethnographies from the Amsterdam festival and afterparty scene illuminate two patterns: young people’s efforts to creatively self-regulate to achieve “hassle-free highs,” and the potentially positive role of government policy. This context is contrasted with that of youth in Indonesia, who also seek out hassle-free highs with their peers, but live under a government that is waging a deadly war against drugs, where they have little access to harm reduction information and tools. Our team discovered that Indonesian youth are turning to psychoactive prescription drugs (PPDs) to get high, which they consider safer than illicit drugs that can lead to the death penalty, but which are also highly addictive.
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5

Farré, Magi, Esther Papaseit, Francina Fonseca, and Marta Torrens. "Addiction of Hallucinogens, Dissociatives, Designer Drugs and “Legal Highs”: Update on Potential Therapeutic Use." In Textbook of Addiction Treatment, 259–79. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36391-8_19.

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6

Ricci, Angela, Silvia Sabbadini, Laura Miozzi, Bruno Mezzetti, and Emanuela Noris. "Host-induced gene silencing and spray-induced gene silencing for crop protection against viruses." In RNAi for plant improvement and protection, 72–85. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248890.0008.

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Abstract Since the beginning of agriculture, plant virus diseases have been a strong challenge for farming. Following its discovery at the very beginning of the 1990s, the RNA interference (RNAi) mechanism has been widely studied and exploited as an integrative tool to obtain resistance to viruses in several plant species, with high target-sequence specificity. In this chapter, we describe and review the major aspects of host-induced gene silencing (HIGS), as one of the possible plant defence methods, using genetic engineering techniques. In particular, we focus our attention on the use of RNAi-based gene constructs to introduce stable resistance in host plants against viral diseases, by triggering post-transcriptional gene silencing (PTGS). Recently, spray-induced gene silencing (SIGS), consisting of the topical application of small RNA molecules to plants, has been explored as an alternative tool to the stable integration of RNAi-based gene constructs in plants. SIGS has great and innovative potential for crop defence against different plant pathogens and pests and is expected to raise less public and political concern, as it does not alter the genetic structure of the plant.
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7

Ricci, Angela, Silvia Sabbadini, Laura Miozzi, Bruno Mezzetti, and Emanuela Noris. "Host-induced gene silencing and spray-induced gene silencing for crop protection against viruses." In RNAi for plant improvement and protection, 72–85. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789248890.0072.

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Abstract Since the beginning of agriculture, plant virus diseases have been a strong challenge for farming. Following its discovery at the very beginning of the 1990s, the RNA interference (RNAi) mechanism has been widely studied and exploited as an integrative tool to obtain resistance to viruses in several plant species, with high target-sequence specificity. In this chapter, we describe and review the major aspects of host-induced gene silencing (HIGS), as one of the possible plant defence methods, using genetic engineering techniques. In particular, we focus our attention on the use of RNAi-based gene constructs to introduce stable resistance in host plants against viral diseases, by triggering post-transcriptional gene silencing (PTGS). Recently, spray-induced gene silencing (SIGS), consisting of the topical application of small RNA molecules to plants, has been explored as an alternative tool to the stable integration of RNAi-based gene constructs in plants. SIGS has great and innovative potential for crop defence against different plant pathogens and pests and is expected to raise less public and political concern, as it does not alter the genetic structure of the plant.
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8

Sher, Marc. "Constraints on Higgs Boson Properties from the Higgs Potential." In Advanced Series on Directions in High Energy Physics, 44–78. WORLD SCIENTIFIC, 1993. http://dx.doi.org/10.1142/9789814440783_0002.

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9

Yan, Qi-Shu. "Probe Higgs Potential via Multi-Higgs Boson Final States at Hadron Colliders." In The Future of High Energy Physics — Some Aspects, 131–35. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813220089_0010.

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QUIROS, M. "CONSTRAINTS ON THE HIGGS BOSON PROPERTIES FROM THE EFFECTIVE POTENTIAL." In Advanced Series on Directions in High Energy Physics, 148–80. WORLD SCIENTIFIC, 1997. http://dx.doi.org/10.1142/9789812819505_0006.

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Тези доповідей конференцій з теми "Higgs potential"

1

Kawada, Shin-ichi. "ILC Higgs physics potential." In The European Physical Society Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2022. http://dx.doi.org/10.22323/1.398.0611.

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2

Kawada, Shin-ichi. "ILC Higgs Physics Potential." In Particles and Nuclei International Conference 2021. Trieste, Italy: Sissa Medialab, 2022. http://dx.doi.org/10.22323/1.380.0396.

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3

Yamashita, Toshifumi, Takeshi Fukuyama, and Tatsuru Kikuchi. "Higgs effective potential in the warped Gauge-Higgs Unification." In GRAND UNIFIED THEORIES: CURRENT STATUS AND FUTURE PROSPECTS: An International Workshop. AIP, 2008. http://dx.doi.org/10.1063/1.2939053.

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4

Kamal, Basim, William J. Marciano, and Zohreh Parsa. "Resonant Higgs enhancement at the first muon collider." In Physics potential and development of μ. AIP, 1998. http://dx.doi.org/10.1063/1.56403.

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5

Bambade, Philip. "Neutral Higgs searches at LEP-2: Present status." In Physics potential and development of μ. AIP, 1998. http://dx.doi.org/10.1063/1.56405.

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6

Quigg, Chris. "The top quark and Higgs boson at hadron colliders." In Physics potential and development of μ. AIP, 1998. http://dx.doi.org/10.1063/1.56394.

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7

Gunion, John F. "Higgs and technicolor Goldstone bosons at a muon collider." In Physics potential and development of μ. AIP, 1998. http://dx.doi.org/10.1063/1.56399.

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BROOKE, J. "HIGGS BOSON DISCOVERY POTENTIAL AT CMS." In Proceedings of the 20th Lake Louise Winter Institute. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812774422_0011.

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9

Wu, Sau Lan. "Higgs searches at LEP2." In The fifth international conference on physics potential and development of muon colliders and neutrino factories. AIP, 2000. http://dx.doi.org/10.1063/1.1336237.

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10

Kinnunen, R. "LHC Potential for the Higgs Boson Discovery." In CAIRO INTERNATIONAL CONFERENCE ON HIGH ENERGY PHYSICS (CICHEP II). AIP, 2007. http://dx.doi.org/10.1063/1.2435298.

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Звіти організацій з теми "Higgs potential"

1

ASSAMAGAN, K. A., Y. COADOU, and A. DEANDREA. ATLAS DISCOVERY POTENTIAL FOR A HEAVY CHARGED HIGGS BOSON. Office of Scientific and Technical Information (OSTI), February 2002. http://dx.doi.org/10.2172/791976.

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2

Carena, Marcela, Estia Eichten, Christopher T. Hill, and Chris Quigg. Brief comments on Higgs boson discovery potential of future Tevatron running. Office of Scientific and Technical Information (OSTI), January 2009. http://dx.doi.org/10.2172/964020.

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Puljak, I. CMS Discovery Potential for the Higgs Boson in the $H \to ZZ^* \to 4e^{\pm}$ Decay Channel. Contribution to the Construction of the CMS Electromagnetic Calorimeter. Office of Scientific and Technical Information (OSTI), September 2000. http://dx.doi.org/10.2172/1421450.

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4

Kingston, A. W., A. Mort, C. Deblonde, and O H Ardakani. Hydrogen sulfide (H2S) distribution in the Triassic Montney Formation of the Western Canadian Sedimentary Basin. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329797.

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The Montney Formation is a highly productive hydrocarbon reservoir with significant reserves of hydrocarbon gases and liquids making it of great economic importance to Canada. However, high concentrations of hydrogen sulfide (H2S) have been encountered during exploration and development that have detrimental effects on environmental, health, and economics of production. H2S is a highly toxic and corrosive gas and therefore it is essential to understand the distribution of H2S within the basin in order to enhance identification of areas with a high risk of encountering elevated H2S concentrations in order to mitigate against potential negative impacts. Gas composition data from Montney wells is routinely collected by operators for submission to provincial regulators and is publicly available. We have combined data from Alberta (AB) and British Columbia (BC) to create a basin-wide database of Montney H2S concentrations. We then used an iterative quality control and quality assurance process to produce a dataset that best represents gas composition in reservoir fluids. This included: 1) designating gas source formation based on directional surveys using a newly developed basin-wide 3D model incorporating AGS's Montney model of Alberta with a model in BC, which removes errors associated with reported formations; 2) removed injection and disposal wells; 3) assessed wells with the 50 highest H2S concentrations to determine if gas composition data is accurate and reflective of reservoir fluid chemistry; and 4) evaluated spatially isolated extreme values to ensure data accuracy and prevent isolated highs from negatively impacting data interpolation. The resulting dataset was then used to calculate statistics for each x, y location to input into the interpolation process. Three interpolations were constructed based on the associated phase classification: H2S in gas, H2S in liquid (C7+), and aqueous H2S. We used Empirical Bayesian Kriging interpolation to generate H2S distribution maps along with a series of model uncertainty maps. These interpolations illustrate that H2S is heterogeneously distributed across the Montney basin. In general, higher concentrations are found in AB compared with BC with the highest concentrations in the Grande Prairie region along with several other isolated region in the southeastern portion of the basin. The interpolations of H2S associated with different phases show broad similarities. Future mapping research will focus on subdividing intra-Montney sub-members plus under- and overlying strata to further our understanding of the role migration plays in H2S distribution within the Montney basin.
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