Search For Neutral Mssm Higgs Bosons Decaying To A Pair Of Tau Leptons In Pp Collisions PDF Download
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| Total Pages | : 54 |
| Release | : 2014 |
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Download Search for Neutral MSSM Higgs Bosons Decaying to a Pair of Tau Leptons in Pp Collisions Book in PDF, ePub and Kindle
A search for neutral Higgs bosons in the minimal supersymmetric extension of the standard model (MSSM) decaying to tau-lepton pairs in pp collisions is performed, using events recorded by the CMS experiment at the LHC. The dataset corresponds to an integrated luminosity of 24.6 fb−1, with 4.9 fb−1 at 7 TeV and 19.7 fb−1 at 8 TeV. To enhance the sensitivity to neutral MSSM Higgs bosons, the search includes the case where the Higgs boson is produced in association with a b-quark jet. No excess is observed in the tau-lepton-pair invariant mass spectrum. Exclusion limits are presented in the MSSM parameter space for different benchmark scenarios, mhmax, mhmod+, mhmod-, light-stop, light-stau, [tau]-phobic, and low-mH. Upper limits on the cross section times branching fraction for gluon fusion and b-quark associated Higgs boson production are also given.
| Author | : Sean P. Lynch |
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| Total Pages | : 129 |
| Release | : 2012 |
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Download Search for Standard Model and Neutral MSSM Higgs Bosons Decaying to Pairs of Tau Leptons at Sqrt(s) Book in PDF, ePub and Kindle
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| Release | : 2011 |
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Download Search for Neutral Minimal Supersymmetric Standard Model Higgs Bosons Decaying to Tau Pairs in Pp Collisions at Sqrt[s] Book in PDF, ePub and Kindle
A search for neutral MSSM Higgs bosons in pp collisions at the LHC at a center-of-mass energy of 7 TeV is presented. The results are based on a data sample corresponding to an integrated luminosity of 36 inverse picobarns recorded by the CMS experiment. The search uses decays of the Higgs bosons to tau pairs. No excess is observed in the tau-pair invariant-mass spectrum. The resulting upper limits on the Higgs boson production cross section times branching fraction to tau pairs, as a function of the pseudoscalar Higgs boson mass, yield stringent new bounds in the MSSM parameter space.
| Author | : Cécile Caillol |
| Publisher | : Springer |
| Total Pages | : 282 |
| Release | : 2017-11-15 |
| Genre | : Science |
| ISBN | : 3319706500 |
Download Scalar Boson Decays to Tau Leptons Book in PDF, ePub and Kindle
This thesis presents a study of the scalar sector in the standard model (SM), as well as various searches for an extended scalar sector in theories beyond the SM (BSM). The first part of the thesis details the search for an SM Higgs boson decaying to taus, and produced by gluon fusion, vector boson fusion, or associated production with a vector boson, leading to evidence for decays of the Higgs boson to taus. In turn, the second part highlights several searches for an extended scalar sector, with scalar boson decays to taus. In all of the analyses presented, at least one scalar boson decays to a pair of taus. The results draw on data collected by the Compact Muon Solenoid (CMS) detector during proton–proton collisions with a center-of-mass energy of 7 or 8 TeV.
| Author | : Michail Bachtis |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 161 |
| Release | : 2013-12-13 |
| Genre | : Science |
| ISBN | : 3319032577 |
Download Heavy Neutral Particle Decays to Tau Pairs Book in PDF, ePub and Kindle
The work presented in this thesis spans a wide range of experimental particle physics subjects, starting from level-1 trigger electronics to the final results of the search for Higgs boson decay and to tau lepton pairs. The thesis describes an innovative reconstruction algorithm for tau decays and details how it was instrumental in providing a measurement of Z decay to tau lepton pairs. The reliability of the analysis is fully established by this measurement before the Higgs boson decay to tau lepton pairs is considered. The work described here continues to serve as a model for analysing CMS Higgs to tau leptons measurements.
| Author | : Luca Cadamuro |
| Publisher | : Springer |
| Total Pages | : 273 |
| Release | : 2018-12-06 |
| Genre | : Science |
| ISBN | : 3030040550 |
Download Search for Higgs Boson Pair Production in the bb̅ τ+ τ- Decay Channel Book in PDF, ePub and Kindle
This thesis presents innovative contributions to the CMS experiment in the new trigger system for the restart of the LHC collisions in Run II, as well as original analysis methods and important results that led to official publications of the Collaboration. The author's novel reconstruction algorithms, deployed on the Field-Programmable Gate Arrays of the new CMS trigger architecture, have brought a gain of over a factor 2 in efficiency for the identification of tau leptons, with a very significant impact on important H boson measurements, such as its decays to tau lepton pairs and the search for H boson pair production. He also describes a novel analysis of HH → bb tautau, a high priority physics topic in a difficult channel. The original strategy, optimisation of event categories, and the control of the background have made the result one of the most sensitive concerning the self-coupling of the Higgs boson among all possible channels at the LHC.
| Author | : Mark Andrew Pickering |
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| Release | : 2016 |
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Download A Search for Neutral High-mass Higgs Bosons Decaying Into Pairs of Hadronically Decaying Tau Leptons in 13 TeV Collisions Recorded by the ATLAS Detector Book in PDF, ePub and Kindle
| Author | : Wang Wei |
| Publisher | : World Scientific |
| Total Pages | : 576 |
| Release | : 2020-02-27 |
| Genre | : Science |
| ISBN | : 9811207410 |
Download Lepton Photon Interactions At High Energies (Lepton Photon 2017) - Proceedings Of The 28th International Symposium Book in PDF, ePub and Kindle
The latest of the 'Lepton Photon' symposium, one of the well-established series of meetings in the high-energy physics community, was successfully organized at the South Campus of Sun Yat-sen University, Guangzhou, China, from August 7-12, 2017, where physicists around the world gathered to discuss the latest advancements in the research field.This proceedings volume of the Lepton Photon 2017 collects contributions by the plenary session speakers and the posters' presenters, which cover the latest results in particle physics, nuclear physics, astrophysics, cosmology, and plans for future facilities.
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| Release | : 2015 |
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Download Search for Higgs Bosons Decaying to Aa in the [mu][mu][tau][tau] Final State in Pp Collisions at [arrow]" Book in PDF, ePub and Kindle
A search for the decay to a pair of new particles of either the 125 GeV Higgs boson (h) or a second charge parity (CP)-even Higgs boson (H) is presented. The data set corresponds to an integrated luminosity of 20.3 fb-1 of pp collisions at [arrow]" = 8 TeV recorded by the ATLAS experiment at the LHC in 2012. The search was done in the context of the next-to-minimal supersymmetric standard model, in which the new particles are the lightest neutral pseudoscalar Higgs bosons (a). One of the two a bosons is required to decay to two muons while the other is required to decay to two [tau] leptons. No significant excess is observed above the expected backgrounds in the dimuon invariant mass range from 3.7 to 50 GeV. The upper limits are placed on the production of h 2!aa relative to the standard model gg 2!h production, assuming no coupling of the a boson to quarks. The most stringent limit is placed at 3.5% for ma = 3.75 GeV. Upper limits are also placed on the production cross section of H 2!aa from 2.33 to 0.72 pb, for fixed ma = 5 GeV with mH ranging from 100 to 500 GeV.
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| Total Pages | : 26 |
| Release | : 2015 |
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Download Search for Neutral MSSM Higgs Bosons Decaying to $\mu{̂+} \mu{̂-}$ in Pp Collisions at $ \sqrt{s} Book in PDF, ePub and Kindle
A search for neutral Higgs bosons predicted in the minimal supersymmetric standard model (MSSM) for ?+?- decay channels is presented. Our analysis uses data collected by the CMS experiment at the LHC in proton–proton collisions at centre-of-mass energies of 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.3 fb-1, respectively. The search is sensitive to Higgs bosons produced either through the gluon fusion process or in association with a bb quark pair. No statistically significant excess is observed in the ?+?- mass spectrum. Results are interpreted in the framework of several benchmark scenarios, and the data are used to set an upper limit on the MSSM parameter tan ? as a function of the mass of the pseudoscalar A boson in the range from 115 to 300 GeV. Furthermore, the model independent upper limits are given for the product of the cross section and branching fraction for gluon fusion and b quark associated production at √s = 8 TeV. As a result, they are the most stringent limits obtained to date in this channel.
