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Articles de revues sur le sujet « Bosone di Higg »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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1

Paraskevopoulos, Christos. « Measurement of the Higgs quartic coupling c 2 v from di-Higgs Vector Boson Fusion in the bb¯τ+τ− channel ». Journal of Physics : Conference Series 2375, no 1 (1 novembre 2022) : 012009. http://dx.doi.org/10.1088/1742-6596/2375/1/012009.

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Abstract The Brout Englert Higgs (BEH) mechanism of electroweak symmetry breaking and mass generation was experimentally confirmed after the discovery of the Higgs boson at the Large Hadron Collider in 2012. The BEH mechanism not only predicts the existence of a massive scalar particle, but also requires this scalar particle to couple to itself. Double Higgs production provides a unique handle, since it allows the extraction of the trilinear Higgs self-coupling. VBF di-Higgs production also probes the quartic Higgs bosons to vector bosons coupling (c 2 v). In this topic the effort on setting constraints on c 2 v will be discussed. Event selection and reconstruction will be illustrated as well as a Neural Network designed to identify VBF events.
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Flacke, Thomas. « Searching for composite Higgs models at the LHC ». International Journal of Modern Physics A 31, no 19 (7 juillet 2016) : 1630026. http://dx.doi.org/10.1142/s0217751x1630026x.

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Composite Higgs models have the potential to provide a solution to the hierarchy problem and a dynamical explanation for the generation of the Higgs potential. They can be tested at the LHC as the new sector which underlies electroweak symmetry breaking must become strong in the TeV regime, which implies additional bound states beyond the Higgs. In this paper, we first discuss prospects and search strategies for top partners (and other quark partners) in the strongly coupled sector, which we study in an effective field theory setup. In the second part of the proceedings, we go beyond the effective field theory approach. We discuss potential UV embeddings for composite Higgs models which contain a Higgs as well as top partners. We show that in all of these models, additional pseudo-Nambu–Goldstone bosons beyond the Higgs are present. In particular, all of the models contain a pseudoscalar which couples to the Standard Model gauge fields through Wess–Zumino–Witten terms, providing a prime candidate for a di-boson (including a di-photon) resonance. The models also contain colored pNGBs which can be searched for at the LHC.
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Maravin, Yurii Y. « DI-BOSON PHYSICS AT THE TEVATRON ». International Journal of Modern Physics A 20, no 15 (20 juin 2005) : 3253–57. http://dx.doi.org/10.1142/s0217751x05026273.

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Using almost twice the luminosity of Run I, we present preliminary results on di-boson final states production at the Tevatron. These results include cross section measurements of most di-boson final states including the first measurement of WW cross section.
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Kuday, S., H. Saygın, İ. Hoş et F. Çetin. « Projections for neutral Di-Boson and Di-Higgs interactions at FCC-he collider ». Nuclear Physics B 932 (juillet 2018) : 1–14. http://dx.doi.org/10.1016/j.nuclphysb.2018.05.002.

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Pierce, Aaron, Jesse Thaler et Lian-Tao Wang. « Disentangling dimension six operators through di-Higgs boson production ». Journal of High Energy Physics 2007, no 05 (21 mai 2007) : 070. http://dx.doi.org/10.1088/1126-6708/2007/05/070.

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Madar, Romain. « Search for fermionic Higgs boson decays in pp collisions at the ATLAS and CMS experiments ». International Journal of Modern Physics : Conference Series 31 (janvier 2014) : 1460287. http://dx.doi.org/10.1142/s2010194514602877.

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The newly discovered boson was only observed in diboson final states. The measurement of the fermionic decay modes of this new particle is essential to establish its compatibility with the Standard Model Higgs boson. The two main final states accessible at the LHC are the decay into pairs of b quarks and τ leptons, both of which are experimentally challenging. In some cases, the exploitation of specific Higgs boson production modes allows to significantly increase the experimental sensitivity. One can also extend the search by looking for di-muon final states. This article gives an overview of the Higgs boson searches in these three fermionic final states at the ATLAS and CMS experiments, focusing on the most recent developments and results.
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Madar, Romain. « Search for fermionic Higgs boson decays in pp collisions at the ATLAS and CMS experiments ». International Journal of Modern Physics A 29, no 26 (16 octobre 2014) : 1430055. http://dx.doi.org/10.1142/s0217751x14300555.

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The newly discovered boson was only observed in diboson final states. The measurement of the fermionic decay modes of this new particle is essential to establish its compatibility with the Standard Model Higgs boson. The two main final states accessible at the LHC are the decay into pairs of b quarks and τ leptons, both of which are experimentally challenging. In some cases, the exploitation of specific Higgs boson production modes allows to significantly increase the experimental sensitivity. One can also extend the search by looking for di-muon final states. This article gives an overview of the Higgs boson searches in these three fermionic final states at the ATLAS and CMS experiments, focusing on the most recent developments and results.
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Trifyllis, Lampros. « The Higgs di-photon decay in the standard model effective field theory ». Facta universitatis - series : Physics, Chemistry and Technology 17, no 1, spec.issue (2019) : 89–96. http://dx.doi.org/10.2298/fupct1901089t.

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Starting from the Standard Model (SM) of elementary particle physics, we assume that new physics effects can be encoded in higher-dimensional operators added in the SM Lagrangian. The resulting theory, the SM Effective Field Theory (SMEFT), is then used for high-accuracy phenomenological studies. Through this paper, the di-photon decay of the Higgs boson is used as a sample of a concrete calculation in the SMEFT framework.
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Lü, Lan-Chun, Chun Du, Yaquan Fang, Hong-Jian He et Huijun Zhang. « Searching heavier Higgs boson via di-Higgs production at LHC Run-2 ». Physics Letters B 755 (avril 2016) : 509–22. http://dx.doi.org/10.1016/j.physletb.2016.02.026.

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Brigljević, V., D. Ferenček, S. Morović, M. Planinić, S. Beauceron, S. Ganjour, G. Hamel de Monchenault et al. « Study of di-boson production with the CMS detector at LHC ». Journal of Physics G : Nuclear and Particle Physics 34, no 7 (30 mai 2007) : N269—N295. http://dx.doi.org/10.1088/0954-3899/34/7/n01.

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11

Wolf, Roger. « Search for the SM Higgs Boson in Di-τFinal States at CMS ». EPJ Web of Conferences 49 (2013) : 12010. http://dx.doi.org/10.1051/epjconf/20134912010.

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12

Bern, Zvi, Lance Dixon et Carl Schmidt. « The di-photon background to a light Higgs boson at the LHC ». Nuclear Physics B - Proceedings Supplements 116 (mars 2003) : 178–82. http://dx.doi.org/10.1016/s0920-5632(03)80165-2.

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Campanario, Francisco, Matthias Kerner, Le Duc Ninh et Dieter Zeppenfeld. « QCD Induced Di-boson Production in Association with Two Jets at NLO QCD ». Nuclear and Particle Physics Proceedings 273-275 (avril 2016) : 2212–18. http://dx.doi.org/10.1016/j.nuclphysbps.2015.09.360.

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Liu, Da, et Lian-Tao Wang. « Probing new physics effects in the precision measurement of the di-boson at the LHC ». International Journal of Modern Physics A 34, no 13n14 (20 mai 2019) : 1940018. http://dx.doi.org/10.1142/s0217751x19400189.

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We have summarized the results about the precision measurements with the di-boson processes [Formula: see text], [Formula: see text], [Formula: see text] at the HL-LHC by using the effective field theory approach. We have focused on the semi-leptonically decaying channels and make projections on the reach on the mass scale for different new physics scenarios.
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15

Raggi, Mauro, et Venelin Kozhuharov. « Proposal to Search for a Dark Photon in Positron on Target Collisions at DAΦNE Linac ». Advances in High Energy Physics 2014 (2014) : 1–14. http://dx.doi.org/10.1155/2014/959802.

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Photon-like particles are predicted in many extensions of the Standard Model. They have interactions similar to the photon, are vector bosons, and can be produced together with photons. The present paper proposes a search for such particles in thee+e-→Uγprocess in a positron-on-target experiment, exploiting the positron beam of the DAΦNE linac at the Laboratori Nazionali di Frascati, INFN. In one year of running a sensitivity in the relative interaction strength down to ~10−6is achievable, in the mass region from 2.5 MeV<MU<20 MeV. The proposed experimental setup and the analysis technique are discussed.
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Alexander, Gideon, et Erez Reinherz-Aronis. « Quark-antiquark energy density function applied to Di-Gauge boson production at the LHC ». Journal of High Energy Physics 2008, no 09 (29 septembre 2008) : 132. http://dx.doi.org/10.1088/1126-6708/2008/09/132.

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17

Heinrich, G., S. Jones, M. Kerner, G. Luisoni et L. Scyboz. « Trilinear Higgs boson coupling variations for di-Higgs production with full NLO QCD predictions in Powheg ». Journal of Physics : Conference Series 1525 (avril 2020) : 012009. http://dx.doi.org/10.1088/1742-6596/1525/1/012009.

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18

JANG, DONGWOOK. « Search for MSSM Higgs Decaying to Tau Pairs ». International Journal of Modern Physics A 20, no 15 (20 juin 2005) : 3314–16. http://dx.doi.org/10.1142/s0217751x05026431.

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We present the results of a search for a neutral MSSM Higgs boson decaying to a pair of tau leptons. The analyzed data sample corresponds to integrated luminosity of approximately 200 pb-1 of [Formula: see text] collisions at [Formula: see text]. It was collected by the CDF detector during Run 2 of the Fermilab Tevatron. We select tau pairs in which one of the taus decays hadronically and the other to e or μ and neutrinos. We see no evidence of signal and perform a fit to the (partially) reconstructed di-tau mass to set limits on the product of Higgs production cross-section and its branching fraction to taus.
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19

Anastasiou, Charalampos, Kirill Melnikov et Frank Petriello. « Fully differential Higgs boson production and the di-photon signal through next-to-next-to-leading order ». Nuclear Physics B 724, no 1-2 (septembre 2005) : 197–246. http://dx.doi.org/10.1016/j.nuclphysb.2005.06.036.

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20

Oceano, Isabella. « Searching for Dark Matter with the PADME experiment ». Journal of Physics : Conference Series 2156, no 1 (1 décembre 2021) : 012058. http://dx.doi.org/10.1088/1742-6596/2156/1/012058.

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Abstract The great success of the Standard Model has reached its maximum with the Higgs boson discovery. However, several anomalies observed in the universe when applying the gravitational theory, lead to believe that the visible matter is not the only constituent of the universe. A new matter component, called dark matter, must be introduced through an extension of the Standard Model. A simple scenario consisting in adding a new gauge symmetry U D (1) and, as a consequence, a new (massive) gauge boson, the dark photon A′. PADME is a new experiment of the Laboratori Nazionali di Frascati searching for the A′, decaying invisibly, produced in the fixed target annihilation e+e − → γA′. The technique used by the experiment to probe the dark photon hypothesis is the missing mass method. The PADME experiment took data in two runs. Some preliminary highlights from the ongoing data analysis effort are presented.
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ZHU, SHOU-HUA. « V-PARTICLE AGAIN ? » International Journal of Modern Physics D 20, no 08 (15 août 2011) : 1399–412. http://dx.doi.org/10.1142/s021827181101958x.

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This talk is mainly based on our previous work.1 We will investigate the possibility of detecting light long-lived particle (LLP) produced by high energy cosmic ray colliding with atmosphere. The LLP may penetrate the atmosphere and decay into a pair of muons near/in the neutrino telescope. Such muons can be treated as the detectable signal for neutrino telescope. The particle with such behavior is very similar with that of the first observed strange particle in cosmic ray events, which was coined historically as "V-particle" in some literature. This study is motivated by recent cosmic electron/positron observations which suggest the existence of O(TeV) dark matter and new light O(GeV) particle. It indicates that dark sector may be complicated, and there may exist more than one light particle, for example the dark gauge boson A′ and associated dark Higgs boson h′. In this work, we discuss the scenario with A′ heavier than h′ and h′ is treated as LLP. Based on our numerical estimation, we find that the large volume neutrino telescope IceCube has the capacity to observe several tens of di-muon events per year for favorable parameters if the decay length of LLP can be comparable with the depth of atmosphere. The challenge here is how to suppress the muon background induced by cosmic rays and atmospheric neutrinos.
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22

Hesselbach, S., S. Moretti, S. Munir et P. Poulose. « Exploring the di-photon decay of a light Higgs boson in the MSSM with explicit CP violation ». European Physical Journal C 54, no 1 (26 janvier 2008) : 129–47. http://dx.doi.org/10.1140/epjc/s10052-007-0503-4.

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23

Gopalakrishna, Shrihari, et Tuhin Subhra Mukherjee. « Gauge-Singlet Vector-Like Fermion Dark Matter, LHC Diphoton Rate, and Direct Detection ». Advances in High Energy Physics 2017 (2017) : 1–14. http://dx.doi.org/10.1155/2017/8689270.

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We study a gauge-singlet vector-like fermion hidden sector dark matter model, in which the communication between the dark matter and the visible standard model sector is via the Higgs-portal scalar-Higgs mixing and also via a hidden sector scalar with loop-level couplings to two gluons and also to two hypercharge gauge bosons induced by a vector-like quark. We find that the Higgs-portal possibility is stringently constrained to be small by the recent LHC di-Higgs search limits, and the loop induced couplings are important to include. In the model parameter space, we present the dark matter relic density, the dark-matter-nucleon direct detection scattering cross section, the LHC diphoton rate from gluon-gluon fusion, and the theoretical upper bounds on the fermion-scalar couplings from perturbative unitarity.
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VON OERTZEN, WOLFRAM. « ALPHA-CLUSTERS IN N=Z NUCLEI AND COHERENT EMISSION OF 2α- and 3α-CLUSTERS FROM EXCITED COMPOUND NUCLEI ». International Journal of Modern Physics E 17, no 10 (novembre 2008) : 2129–35. http://dx.doi.org/10.1142/s0218301308011215.

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Conditions for a phase change with the formation of an α-particle condensate in excited N = Z nuclei, a dilute Bose-Gas, are discussed for excitation energies around EBα = 0, These are second order phase transitions in a mixed gas of Fermions and Bosons. The de-Broglie wavelength of relative motion for α-particles in these states is much larger then the nuclear radii. The experimental observation of the decay of such condensed α-particle states is proposed, with the coherent emission of several correlated α-particles, a decay not described by the Hauser-Feshbach approach for statistical compound nucleus decay. Examples of such observations with the enhanced emission of unbound resonances of 8 Be and [Formula: see text] — clusters are discussed. The experiments involved the ISIS-GASP-detection systems at the Laboratorii Nationale di Legnaro.
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Niu, Y., Y. Shi, H. Zhao, Y. Zhang, M. Ruan et J. Liu. « SiPM dynamic range for CEPC scintillator-based electromagnetic calorimeter ». Journal of Instrumentation 16, no 12 (1 décembre 2021) : T12008. http://dx.doi.org/10.1088/1748-0221/16/12/t12008.

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Abstract A high-granularity scintillator calorimeter readout with silicon photomultipliers (SiPMs) is an electromagnetic calorimeter (ECAL) candidate for experiments at the Circular Electron Positron Collider (CEPC). A critical design parameter of this ECAL candidate is the dynamic range of the SiPMs. This study investigates the SiPM dynamic range required for the CEPC scintillator ECAL. A model is developed on the basis of the operation principles of SiPMs to describe the response of an SiPM to light pulses within one recovery period by considering the cross-talk effect, photon detection efficiency, and number of pixels. The response curve of a 10000-pixel SiPM predicted by the model is consistent with the measured curve within 2% for an incident light pulse of up to 12000 photons. The intrinsic fluctuations of the SiPM response naturally exist in this model, and the correction of the saturation effect in the SiPM response is investigated. Monte Carlo (MC) simulation shows that the algorithm can restore the response linearity of an SiPM for an incident light pulse in which the number of photons is up to around six times the number of SiPM pixels. The model and correction program are implemented for full simulation of the ZH production Z → νν, H → γγ channel to evaluate the impact of the SiPM dynamic range of the CEPC scintillator ECAL on the reconstructed Higgs boson mass and the sensitivity to the Higgs signal in this channel. The results show that the CEPC scintillator ECAL equipped with no less than 4000 SiPM pixels and operated with a light yield of 20 photon-electrons per channel for a single minimum ionizing particle can meet the requirements for Higgs boson precision measurement in the di-photon channel at the CEPC.
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Reed, Robert Graham. « Measurement of the Higgs Boson Transverse Momentum in the Di-photon Channel with the ATLAS detector in Run 1 ». Journal of Physics : Conference Series 645 (15 octobre 2015) : 012015. http://dx.doi.org/10.1088/1742-6596/645/1/012015.

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Cox, Peter, Anibal D. Medina, Tirtha Sankar Ray et Andrew Spray. « Implications of diphoton searches for a radion in the bulk-Higgs scenario ». International Journal of Modern Physics A 32, no 04 (9 février 2017) : 1750020. http://dx.doi.org/10.1142/s0217751x17500208.

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In this work, we point out that the apparent diphoton excess initially presented by the ATLAS and CMS collaborations could have originated from a radion in the bulk Higgs scenario within a warped extra dimension. In this scenario, the couplings of the radion to massive gauge bosons are suppressed, allowing it to evade existing searches. In the presence of mixing with the Higgs, due to the strong constraints from diboson searches, only points near what we denominate the alignment region were able to explain the diphoton signal and evade other experimental constraints. In light of the new measurements presented at ICHEP 2016 by both LHC collaborations, which do not confirm the initial diphoton excess, we study the current and future collider constraints on a radion within the bulk-Higgs scenario. We find that searches in the diphoton channel provide the most powerful probe of this scenario and already exclude large regions of parameter space, particularly for smaller warp factors. The radion has a sizeable branching ratio into top pairs and this channel may also give competitive constraints in the future. Finally, di-Higgs searches can provide a complementary probe in the case of nonzero radion-Higgs mixing but strong alignment.
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Montero, Yuyibeth, María Eugenia Girón, Rafael Medina, Belsy Guerrero, Luis Fernando Navarrete et Alexis Rodríguez-Acosta. « The Bushmaster (Cuaima) snake (Lachesis muta muta) of the Neotropical forest : the description of several haemostatic and biological activities in its venom ». Revista Científica de la Facultad de Ciencias Veterinarias XXXII (21 décembre 2021) : 1–7. http://dx.doi.org/10.52973/rcfcv-e32070.

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Cuaima (Lachesis muta muta)(Lmm) is responsible for particular envenomations that occur mainly in people who are exploring forest areas, in logging activities, mining exploitation (mainly gold and diamonds) or indigenous people who live in small communities and develop their vital activity in tropical and subtropical jungles of the Venezuelan Lmm territory. A fibrinolytic toxin has been purified from the venom of bushmaster cuaima by size exclusion chromatography Sephacryl 300 chromatography column. Fractions collected with high fibrinolytic and scarce haemorrhagic activities were further fractionated by a cationic exchange Carboxymetil-Sepharose (CMS) chromatography column. From CMS was obtained a molecular mass ~26 kDa single band by SDS-PAGE, called Yuyilysin, which had fibrinolytic activity that was completely lost after treatment with ethylene di-amine tetra acetic acid (EDTA). In conclusion, Yuyilysin showed a broader spectrum of activities, with moderate haemorrhagic activity, non-oedematogenic achievement, but strong fibrinolytic and coagulant actions.
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Pratama, Muhammad Ridho, Fadli Handoyo, Shallu Fidhah Ariyanti, Delila Septiani Dwi Putri et Michael Setiyanto Silambi. « Studi Projek Trajectories Partikel dalam Medan Magnet Non Homogen di ATLAS dengan Menggunakan Runge-Kutta-Nystrom dan Runge-Kutta-Nystrom Adaptif ». Mitra Pilar : Jurnal Pendidikan, Inovasi, dan Terapan Teknologi 1, no 1 (30 juin 2022) : 27–36. http://dx.doi.org/10.58797/pilar.0101.04.

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Abstract The problem that arises in the numerical method is the validation of the answers obtained from these calculations. Another phenomenon that can be analyzed using other numerical approaches was also discovered by the European Institute for Nuclear Research, CERN. four giant detectors record the energy-producing Higgs boson particles. One such detector is ATLAS. As for this research, a new adaptive Runge-Kutta-Nystrom method was developed for the STEP algorithm on the ATLAS detector. In solving problems regarding the determination of the second-order ordinary differential equation (2) on the path of particles in the non-homogeneous magnetic field of the ATLAS detector (A Toroidal LHC Apparatus). Two types of modified Runge-Kutta methods were used. This method is the adaptive Runge Kutta Nystrom method which is then compared with the usual Runge Kutta Nystrom method to find the function r(s) which is a 2nd-order differential function. The output table contains data for arc length (s), the radius of curvature (r), the gradient of the function R(dr/ds), and the step size (h).Runge-Kutta Nystrom Table Outputs. Adaptive Runge-Kutta Nystrom Graph Output. Runge-Kutta Nystrom Graph Output. Project Discussion. Based on Algorithm. Based on Time Consumption. Based on Cost-Computation. Based on the Step-Size Difference. Based on the time consumption, the Adaptive Runge-Kutta Nystrom algorithm requires a faster running time than the usual Runge-Kutta Nystrom algorithm. Adaptive Runge-Kutta Nystrom takes 1,095 seconds to run, and Runge Kutta Nystrom takes 2,135 seconds. If it is reviewed based on the computational side which is focused on memory efficiency, the Adaptive Runge-Kutta Nystrom method is better than Runge-Kutta Nystrom. Abstrak Permasalahan yang muncul pada metode numerik adalah validasi jawaban yang diperoleh dari perhitungan tersebut. Fenomena lain yang dapat dianalisis dengan menggunakan pendekatan numerik lainnya juga ditemukan oleh Lembaga Riset Nuklir Eropa, CERN. partikel Higgs boson yang menghasilkan energi direkam oleh empat detektor raksasa. Salah satu detektor tersebut adalah ATLAS. Adapun dalam penelitian ini dikembangkan metode Runge-Kutta-Nystrom adaptif yang baru untuk algoritma STEP pada detektor ATLAS Dalam menyelesaikan persoalan mengenai penentuan persamaan diferensial biasa orde 2 (dua) pada lintasan partikel dalam medan magnet non-homogen detektor ATLAS (A Toroidal LHC Apparatus) digunakan dua jenis metode Runge-Kutta yang dimodisikasi. Metode tersebut yaitu metode Runge Kutta Nystrom adaptif yang kemudian dibandingkan dengan metode Runge Kutta Nystrom biasa untuk mencari fungsi r(s) yang merupakan fungsi diferensial orde 2. Output Tabel yang berisikan data nilai panjang busur (s), jari-jari kelengkungan (r), gradien fungsi R(dr/ds), dan ukuran langkah (h). Output Tabel Runge-Kutta Nystrom. Output Grafik Runge-Kutta Nystrom Adaptif. Output Grafik Runge-Kutta Nystrom. Pembahasan Projek. Berdasarkan Algoritma. Berdasarkan Time Consumption. Berdasarkan Cost-Computation. Berdasarkan Perbedaan Step-Size.Bedasarkan sisi time consumption algoritma Runge-Kutta Nystrom Adaptif membutuhkan waktu running yang lebih cepat dibandingkan algoritma Runge-Kutta Nystrom biasa. Runge-Kutta Nystrom Adaptif membutuhkan waktu running selama 1.095 detik dan Runge Kutta Nystrom membutuhkan waktu selama 2.135 detik. Jika ditinjau berdasarkan sisi komputasi yang difokuskan pada efisiensi memori, maka dapat dikatakan bahwa metode Runge-Kutta Nystrom Adaptif lebih baik dari Runge-Kutta Nystrom.
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Widada, Agus, Jubaidi Jubaidi, Mualim Mualim, Andriana Marwanto et Dina Oktavia. « PEMBERDAYAAN MASYARAKAT DALAM KEPEMILIKAN JAMBAN KELUARGA DI DESA TALANG BOSENG WILAYAH PUSKESMAS SIDODADI KECAMATAN PONDOK KELAPA KABUPATEN BENGKULU TENGAH ». DEVOTE : Jurnal Pengabdian Masyarakat Global 1, no 2 (26 décembre 2022) : 173–78. http://dx.doi.org/10.55681/devote.v1i2.409.

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Efforts to improve hygiene behavior and increase access to sanitation continue to be developed. One of the applications of the Community Led Total Sanitation (CLTS) concept, CLTS is a concept with a promotion approach by facilitating the community to apply good environmental sanitation with a focus on not defecating in the open. Based on the 2019 annual report Health Center, the incidence of diarrhea ranks second in environmental-based diseases with 111 cases. The high prevalence of diarrhea is partly due to the lack of access to clean water, as much as 27.4% of clean water facilities/dug wells do not meet the requirements. As many as 35% of households still defecate in the open. The process of implementing community service activities in the framework of open defecation-free villages in Talang Boseng Village Working Area of ​​the Sidodadi Health Center, Pondok Kelapa District, Central Bengkulu Regency, namely using a combination of triggering and providing stimulants for the construction of family latrines carried out by the Community Service Team from the Bengkulu Ministry of Health Polytechnic, Sidodadi Health Center, Sidodadi Village Officials, and the Sidodadi community who do not yet have or who have latrines that do not meet health requirements.
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31

Rieger, Marcel. « Design Pattern for Analysis Automation on Distributed Resources using Luigi Analysis Workflows ». EPJ Web of Conferences 245 (2020) : 05025. http://dx.doi.org/10.1051/epjconf/202024505025.

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In particle physics, workflow management systems are primarily used as tailored solutions in dedicated areas such as Monte Carlo event generation. However, physicists performing data analyses are usually required to steer their individual workflows manually, which is time-consuming and often leads to undocumented relations between particular workloads. We present the Luigi Analysis Workflows (Law) Python package, which is based on the opensource pipelining tool Luigi, originally developed by Spotify. It establishes a generic design pattern for analyses of arbitrary scale and complexity, and shifts the focus from executing to defining the analysis logic. Law provides the building blocks to seamlessly integrate interchangeable remote resources without, however, limiting itself to a specific choice of infrastructure. In particular, it encourages and enables the separation of analysis algorithms on the one hand, and run locations, storage locations, and software environments on the other hand. To cope with the sophisticated demands of end-to-end HEP analyses, Law supports job execution on WLCG infrastructure (ARC, gLite) as well as on local computing clusters (HTCondor, LSF), remote file access via most common protocols through the GFAL2 library, and an environment sandboxing mechanism with support for Docker and Singularity containers. Moreover, the novel approach ultimately aims for analysis preservation out-of-the-box. Law is entirely experiment independent and developed open-source. It is successfully used in tt̄H cross section measurements and searches for di-Higgs boson production with the CMS experiment.
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32

Arhrib, A., R. Benbrik, M. Krab, B. Manaut, S. Moretti, Yan Wang et Qi-Shu Yan. « New discovery modes for a light charged Higgs boson at the LHC ». Journal of High Energy Physics 2021, no 10 (octobre 2021). http://dx.doi.org/10.1007/jhep10(2021)073.

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Abstract At the Large Hadron Collider (LHC), both the ATLAS and CMS Collaborations have been searching for light charged Higgs bosons via top (anti)quark production and decays channels, like pp → t$$ \overline{t} $$ t ¯ with one top (anti)quark decaying into a charged Higgs boson and a b (anti)quark, when the decay is kinematically open (i.e., when $$ {m}_{H^{\pm }} $$ m H ± ≲ mt). In this paper, we propose new searches at the LHC involving light charged Higgs bosons via their pair production channels like pp → H±h/A and pp → H+H− in the 2-Higgs Doublet Model (2HDM) Type-I and -X scenarios. By focusing on the case where the heavy H state plays the role of the Standard Model (SM)-like Higgs boson with a mass near 125 GeV, we study the aforementioned Higgs boson pair production channels and investigate their bosonic decays, such as H± → W±h and/or H± → W±A. We demonstrate that for a light charged Higgs boson state, with $$ {m}_{H^{\pm }} $$ m H ± ≲ mt, at the LHC, such di-Higgs production and decay channels can give rise to signatures with event rates much larger than those emerging from pp → t$$ \overline{t} $$ t ¯ → t$$ \overline{b} $$ b ¯ H− + c.c. We specifically study h/A → b$$ \overline{b} $$ b ¯ and τ+τ− decays. We, therefore, claim that the discussed combination of new production and decay modes can result in an alternative discovery channel for charged Higgs bosons lighter than the top (anti)quark at the LHC within the above two 2HDM Types. Finally, in order to motivate experimentalists in ATLAS and CMS to search for such signatures, we propose 16 Benchmark Points (BPs) which are compatible with both theoretical and experimental constraints.
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Arco, F., S. Heinemeyer et M. J. Herrero. « Sensitivity to triple Higgs couplings via di-Higgs production in the 2HDM at $$e^+e^-$$ colliders ». European Physical Journal C 81, no 10 (octobre 2021). http://dx.doi.org/10.1140/epjc/s10052-021-09665-w.

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AbstractAn important task at future colliders is the investigation of the Higgs-boson sector. Here the measurement of the triple Higgs coupling(s) plays a special role. Based on previous analyses, within the framework of Two Higgs Doublet Models (2HDM) type I and II, we define and analyze several two-dimensional benchmark planes, that are over large parts in agreement with all theoretical and experimental constraints. For these planes we evaluate di-Higgs production cross sections at future high-energy $$e^+e^-$$ e + e - colliders, such as ILC or CLIC. We consider two different channels for the neutral di-Higgs pairs $$h_i h_j=hh,hH,HH,AA$$ h i h j = h h , h H , H H , A A : $$e^+e^- \rightarrow h_i h_j Z$$ e + e - → h i h j Z and $$e^+e^- \rightarrow h_i h_j \nu {{\bar{\nu }}}$$ e + e - → h i h j ν ν ¯ . In both channels the various triple Higgs-boson couplings contribute substantially. We find regions with a strong enhancement of the production channel of two SM-like light Higgs bosons and/or with very large production cross sections involving one light and one heavy or two heavy 2HDM Higgs bosons, offering interesting prospects for the ILC or CLIC. The mechanisms leading to these enhanced production cross sections are analyzed in detail. We propose the use of cross section distributions with the invariant mass of the two final Higgs bosons where the contributions from intermediate resonant and non-resonant BSM Higgs bosons play a crucial role. We outline which process at which center-of-mass energy would be best suited to probe the corresponding triple Higgs-boson couplings.
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Bahl, Henning, Philip Bechtle, Sven Heinemeyer, Stefan Liebler, Tim Stefaniak et Georg Weiglein. « HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons ». European Physical Journal C 80, no 10 (octobre 2020). http://dx.doi.org/10.1140/epjc/s10052-020-08472-z.

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AbstractThe prediction of additional Higgs bosons is one of the key features of physics beyond the Standard Model (SM) that gives rise to an extended Higgs sector. We assess the sensitivity of the Large Hadron Collider (LHC) in the high luminosity (HL) run alone and in combination with a possible future International Linear Collider (ILC) to probe heavy neutral Higgs bosons. We employ the Minimal Supersymmetric Standard Model (MSSM) as a framework and assume the light $$\mathcal {CP}$$ CP -even MSSM Higgs boson to be the Higgs boson observed at $$125\,\mathrm{GeV}$$ 125 GeV . We discuss the constraints on the MSSM parameter space arising from the precision measurements of the rates of the detected signal at $$125\,\mathrm{GeV}$$ 125 GeV and from direct searches for new heavy Higgs bosons in the $$\tau ^+\tau ^-$$ τ + τ - , $$b\bar{b}$$ b b ¯ and di-Higgs (hh) final states. A new benchmark scenario for heavy Higgs searches in the $$b\bar{b}$$ b b ¯ channel is proposed in this context. For the future Higgs rate measurements at the HL-LHC and ILC two different scenarios are investigated, namely the case where the future rate measurements agree with the SM prediction and the case where the rates agree with the predictions of possible realizations of the MSSM Higgs sector in nature.
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35

Aad, G., B. Abbott, D. C. Abbott, A. Abed Abud, K. Abeling, D. K. Abhayasinghe, S. H. Abidi et al. « Reconstruction and identification of boosted di-τ systems in a search for Higgs boson pairs using 13 TeV proton-proton collision data in ATLAS ». Journal of High Energy Physics 2020, no 11 (novembre 2020). http://dx.doi.org/10.1007/jhep11(2020)163.

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Abstract In this paper, a new technique for reconstructing and identifying hadronically decaying τ+τ− pairs with a large Lorentz boost, referred to as the di-τ tagger, is developed and used for the first time in the ATLAS experiment at the Large Hadron Collider. A benchmark di-τ tagging selection is employed in the search for resonant Higgs boson pair production, where one Higgs boson decays into a boosted $$ b\overline{b} $$ b b ¯ pair and the other into a boosted τ+τ− pair, with two hadronically decaying τ-leptons in the final state. Using 139 fb−1 of proton-proton collision data recorded at a centre-of-mass energy of 13 TeV, the efficiency of the di-τ tagger is determined and the background with quark- or gluon-initiated jets misidentified as di-τ objects is estimated. The search for a heavy, narrow, scalar resonance produced via gluon-gluon fusion and decaying into two Higgs bosons is carried out in the mass range 1–3 TeV using the same dataset. No deviations from the Standard Model predictions are observed, and 95% confidence-level exclusion limits are set on this model.
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36

Fraternali, Marco. « LA SCOPERTA DEL BOSONE DI HIGGS ». Istituto Lombardo - Accademia di Scienze e Lettere - Rendiconti di Scienze, 30 décembre 2013. http://dx.doi.org/10.4081/scie.2013.183.

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In July 2012, the two experiments ATLAS and CMS, operating at the CERN proton-proton collider LHC, announced the discovery of a new particle consistent with the Higgs boson. This observation confirms a key prediction of the Standard Model of particle physics, that the Universe is pervaded by a field which conveys mass to the elementary constituents of matter. This paper reviews the experimental effort which led to such a result, and the challanges that had to be overcome during the conception and constuction of LHC and its experiments, the most powerful accelerator and the most complex detectors ever built. Finally, the nature and role of CERN and the meaning and impact of fundamental research are briefly discussed.
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Abouabid, Hamza, Abdesslam Arhrib, Duarte Azevedo, Jaouad El Falaki, Pedro M. Ferreira, Margarete Mühlleitner et Rui Santos. « Benchmarking di-Higgs production in various extended Higgs sector models ». Journal of High Energy Physics 2022, no 9 (1 septembre 2022). http://dx.doi.org/10.1007/jhep09(2022)011.

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Abstract We present a comprehensive study on Higgs pair production in various archetypical extended Higgs sectors such as the real and the complex 2-Higgs-Doublet Model, the 2-Higgs-Doublet Model augmented by a real singlet field and the Next-to-Minimal Supersymmetric extension of the Standard Model. We take into account all relevant theoretical and experimental constraints, in particular the experimental limits on non-resonant and resonant Higgs pair production. We present the allowed cross sections for Standard Model (SM)-like Higgs pair production and the ranges of the SM-like Yukawa and trilinear Higgs self-coupling that are still compatible with the applied constraints. Furthermore, we give results for the pair production of a SM-like with a non-SM-like Higgs boson and for the production of a pair of non-SM-like Higgs bosons. We find that di-Higgs production in the models under investigation can exceed the SM rate substantially, not only in the non-resonance region but also due to resonant enhancement. We give several benchmarks with interesting features such as large cross sections, the possibility to test CP violation, Higgs-to-Higgs cascade decays or di-Higgs production beating single Higgs production. In all of our benchmark points, the next-to-leading order QCD corrections are included in the large top-mass limit. For these points, we found that, depending on the model and the Higgs pair final state, the corrections increase the leading order cross section by a factor of 1.79 to 2.24. We also discuss the relation between the description of Higgs pair production in an effective field theory approach and in the specific models investigated here.
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38

Chen, Siyu, Alfredo Glioti, Riccardo Rattazzi, Lorenzo Ricci et Andrea Wulzer. « Learning from radiation at a very high energy lepton collider ». Journal of High Energy Physics 2022, no 5 (mai 2022). http://dx.doi.org/10.1007/jhep05(2022)180.

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Abstract We study the potential of lepton collisions with about 10 TeV center of mass energy to probe Electroweak, Higgs and Top short-distance physics at the 100 TeV scale, pointing out the interplay with the long-distance (100 GeV) phenomenon of Electroweak radiation. On one hand, we find that sufficiently accurate theoretical predictions require the resummed inclusion of radiation effects, which we perform at the double logarithmic order. On the other hand, we notice that short-distance physics does influence the emission of Electroweak radiation. Therefore the investigation of the radiation pattern can enhance the sensitivity to new short-distance physical laws. We illustrate these aspects by studying Effective Field Theory contact interactions in di-fermion and di-boson production, and comparing cross-section measurements that require or that exclude the emission of massive Electroweak bosons. The combination of the two types of measurements is found to enhance the sensitivity to the new interactions. Based on these results, we perform sensitivity projections to Higgs and Top Compositeness and to minimal Z′ new physics scenarios at future muon colliders.
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39

Betti, Alessandra. « Prospects for Higgs and di-Higgs measurements at the ATLAS experiment ». SciPost Physics Proceedings, no 8 (13 juillet 2022). http://dx.doi.org/10.21468/scipostphysproc.8.117.

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The large dataset of about 3000 {fb}^{-1}fb−1 that will be collected at the High Luminosity LHC (HL-LHC) will be used to measure Higgs boson processes in detail. This large dataset will also provide sensitivity to di-Higgs processes and will allow for the improvement of the constraints on the Higgs boson self coupling. Studies based on current ATLAS analyses using LHC Run 2 data have been carried out to understand the expected precision and limitations of the Higgs and di-Higgs measurements at the HL-LHC. This paper presents the ATLAS prospects for Higgs and di-Higgs results at the HL-LHC.
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40

Biekötter, T., A. Grohsjean, S. Heinemeyer, C. Schwanenberger et G. Weiglein. « Possible indications for new Higgs bosons in the reach of the LHC : N2HDM and NMSSM interpretations ». European Physical Journal C 82, no 2 (février 2022). http://dx.doi.org/10.1140/epjc/s10052-022-10099-1.

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AbstractIn several searches for additional Higgs bosons at the LHC, in particular in a CMS search exploring decays to pairs of top quarks, $$t\bar{t}$$ t t ¯ , and in an ATLAS search studying tau leptons, $$\tau ^+\tau ^-$$ τ + τ - , local excesses of about $$3\,\sigma $$ 3 σ standard deviations or above have been observed at a mass scale of approximately $$ 400 \,\text {GeV}$$ 400 GeV . We investigate to what extent a possible signal in these channels could be accommodated in the Next-to-Two-Higgs-Doublet Model (N2HDM) or the Next-to Minimal Supersymmetric Standard Model (NMSSM). In a second step we analyze whether such a model could be compatible with both a signal at around $$400\,\text {GeV}$$ 400 GeV and $$96\,\text {GeV}$$ 96 GeV , where the latter possibility is motivated by observed excesses in searches for the $$b \bar{b}$$ b b ¯ final state at LEP and the di-photon final state at CMS. The analysis for the N2HDM reveals that the observed excesses at $$400 \,\text {GeV}$$ 400 GeV in the $$t\bar{t}$$ t t ¯ and $$\tau ^+\tau ^-$$ τ + τ - channels point towards different regions of the parameter space, while one such excess and an additional Higgs boson at around $$96\,\text {GeV}$$ 96 GeV could simultaneously be accommodated. In the context of the NMSSM an experimental confirmation of a signal in the $$t\bar{t}$$ t t ¯ final state would favour the alignment-without-decoupling limit of the model, where the Higgs boson at $$125\,\text {GeV}$$ 125 GeV could be essentially indistinguishable from the Higgs boson of the standard model. In contrast, a signal in the $$\tau ^+\tau ^-$$ τ + τ - channel can only be accommodated outside of this limit, and parts of the investigated parameter space could be probed with Higgs signal-rate measurements at the (HL-)LHC.
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41

Baker, Michael J., Timothy Martonhelyi, Andrea Thamm et Riccardo Torre. « The role of vector boson fusion in the production of heavy vector triplets at the LHC and HL-LHC ». Journal of High Energy Physics 2022, no 11 (14 novembre 2022). http://dx.doi.org/10.1007/jhep11(2022)066.

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Abstract We clarify the role of vector boson fusion (VBF) in the production of heavy vector triplets at the LHC and the HL-LHC. We point out that the presence of VBF production leads to an unavoidable rate of Drell-Yan (DY) production and highlight the subtle interplay between the falling parton luminosities and the increasing importance of VBF production as the heavy vector mass increases. We discuss current LHC searches and HL-LHC projections in di-boson and di-lepton final states and demonstrate that VBF production outperforms DY production for resonance masses above 1 TeV in certain regions of the parameter space. We define two benchmark parameter points which provide competitive production rates in vector boson fusion.
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42

Schildgen, Lara Katharina. « Measurements of Higgs-boson decays to leptons with the ATLAS detector ». SciPost Physics Proceedings, no 1 (19 février 2019). http://dx.doi.org/10.21468/scipostphysproc.1.019.

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Since its discovery in 2012, the Higgs boson has served as an important probe for precision measurements of the Standard Model and for searches for new physics beyond the Standard Model. One major goal of the LHC is the precise measurement of the Higgs Yukawa couplings to fermions. The latest ATLAS results of measurements of the Higgs boson decaying to leptons are presented, namely the cross-section measurement of the Higgs boson decay to two tau leptons and the searches for the di-muon decay and lepton-flavour-violating decays of the Higgs boson.
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Schopf, Elisabeth. « Recent Highlights on Higgs Physics from the LHC ». SciPost Physics Proceedings, no 8 (11 juillet 2022). http://dx.doi.org/10.21468/scipostphysproc.8.001.

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Many of the Higgs boson production and decay channels, predicted by the Standard Model, have been observed since its 2012 discovery. Today, measurements of the Higgs boson’s properties in these channels deepen our understanding of the nature of this fundamental particle by providing better information about its mass, production kinematics, and CP structure. Increasing precision also enables targeting rare Higgs boson decay modes and probing di-Higgs-boson production. In addition, searches for beyond Standard Model physics in the Higgs sector are performed. This article presents the latest Higgs boson measurement highlights from the ATLAS and CMS collaborations using LHC proton-proton collision data at a centre of mass energy of 13 TeV.
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Pelaggi, Giulio Maria, Alessandro Strumia et Elena Vigiani. « Trinification can explain the di-photon and di-boson LHC anomalies ». Journal of High Energy Physics 2016, no 3 (mars 2016). http://dx.doi.org/10.1007/jhep03(2016)025.

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45

Barman, Rahool Kumar, Christoph Englert, Dorival Gonçalves et Michael Spannowsky. « Di-Higgs resonance searches in weak boson fusion ». Physical Review D 102, no 5 (17 septembre 2020). http://dx.doi.org/10.1103/physrevd.102.055014.

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46

Nicrosini, Oreste. « UNA PIETRA MILIARE NELLA COMPRENSIONE DEL MICROCOSMO : IL BOSONE DI HIGGS ». Istituto Lombardo - Accademia di Scienze e Lettere - Rendiconti di Scienze, 14 juillet 2015. http://dx.doi.org/10.4081/scie.2013.165.

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The Nobel Prize in Physics 2013 has been awarded to P.W. Higgs and F. Englert for the conception of a theoretical framework that contributes to the understanding of the origin of mass of subatomic particles. The mechanism (known as the Higgs mechanism) has been recently confirmed by the observation of the fundamental particle predicted (the so called Higgs boson) by the ATLAS and CMS experiments of the Large Hadron Collider at CERN, Geneva. Particle physicists all over the world, both theoreticians and experimentalists, have contributed to the result in the last thirty years, to say the least: in the present paper an account is given of this discovery, a milestone in the current understanding of the microcosm.
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Englert, Christoph, et Joerg Jaeckel. « Probing the symmetric Higgs portal with di-Higgs boson production ». Physical Review D 100, no 9 (15 novembre 2019). http://dx.doi.org/10.1103/physrevd.100.095017.

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Lee, Joon-Bin, et Jehyun Lee. « Implementation of the CMS-HIG-18-011 analysis in the MadAnalysis 5 framework (exotic Higgs decays via two pseudoscalars with two muons and two b-jets ; 35.9 fb−1) ». Modern Physics Letters A, 16 décembre 2020, 2141003. http://dx.doi.org/10.1142/s0217732321410030.

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We present the implementation in the MadAnalysis 5 framework of the CMS-HIG-18-011 search for exotic decays of the Standard Model Higgs boson, in which the Higgs boson is assumed to decay into a pair of light pseudoscalar [Formula: see text], that then further decay into a di-muon and di-[Formula: see text]-jet final state. This analysis considers proton-proton collisions at a center-of-mass energy of 13 TeV and data collected by the CMS experiment in 2016, with an integrated luminosity of 35.9 fb[Formula: see text]. We present a selection of recast predictions, obtained with MadAnalysis 5 and Delphes 3, that include a few differential distributions, yields, and efficiencies. We show that they agree at a level of a few percent with public CMS results.
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Biekötter, T., S. Heinemeyer et G. Weiglein. « Mounting evidence for a 95 GeV Higgs boson ». Journal of High Energy Physics 2022, no 8 (19 août 2022). http://dx.doi.org/10.1007/jhep08(2022)201.

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Abstract In 2018 CMS reported an excess in the light Higgs-boson search in the diphoton decay mode at about 95 GeV based on Run 1 and first year Run 2 data. The combined local significance of the excess was 2.8 σ. The excess is compatible with the limits obtained in the ATLAS searches from the diphoton search channel. Recently, CMS reported another local excess with a significance of 3.1 σ in the light Higgs-boson search in the di-tau final state, which is compatible with the interpretation of a Higgs boson with a mass of about 95 GeV. We show that the observed results can be interpreted as manifestations of a Higgs boson in the Two-Higgs Doublet Model with an additional real singlet (N2HDM). We find that the lightest Higgs boson of the N2HDM can fit both excesses simultaneously, while the second-lightest state is such that it satisfies the Higgs-boson measurements at 125 GeV, and the full Higgs-boson sector is compatible with all Higgs exclusion bounds from the searches at LEP, the Tevatron and the LHC as well as with other theoretical and experimental constraints. Finally, we demonstrate that it is furthermore possible to accommodate the excesses observed by CMS in the two search channels together with a local 2.3 σ excess in the $$ b\overline{b} $$ b b ¯ final state observed at LEP in the same mass range.
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Alves, Alexandre, Tathagata Ghosh et Farinaldo S. Queiroz. « Dark and bright signatures of di-Higgs boson production ». Physical Review D 100, no 3 (26 août 2019). http://dx.doi.org/10.1103/physrevd.100.036012.

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