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Search For Doubly Charged Higgs Boson In Multi Lepton Final States With The Atlas Detector
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Book Synopsis Search for Doubly Charged Higgs Boson in Multi-lepton Final States with the ATLAS Detector by : Katja Mankinen
Download or read book Search for Doubly Charged Higgs Boson in Multi-lepton Final States with the ATLAS Detector written by Katja Mankinen and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for Higgs Bosons in Final States with Multiple Tau Leptons at the DØ Experiment by :
Download or read book A Search for Higgs Bosons in Final States with Multiple Tau Leptons at the DØ Experiment written by and published by . This book was released on 2012 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two searches for the production of Higgs bosons decaying into [tau] and [mu] leptons, using data collected with the DØ detector at the Fermilab Tevatron p$\bar{p}$ collider, are presented. A search for the pair production of doubly charged Higgs bosons in the process q$\bar{q}$ 2!H++H--, where H ±± decays to [tau][tau], [mu][mu] or [tau][mu] lepton pairs, with an integrated luminosity of up to L = 7:0 fb-1, is presented. No signi cant excess of data over the expected SM background is observed and the results are used to set 95% C.L. limits on the pair production cross section of doubly charged Higgs bosons in the range 90
Book Synopsis Search for Charged Higgs Bosons Decaying Via H± → Τ±ν in Fully Hadronic Final States with the ATLAS Detector at the LHC by : Anna Kopp
Download or read book Search for Charged Higgs Bosons Decaying Via H± → Τ±ν in Fully Hadronic Final States with the ATLAS Detector at the LHC written by Anna Kopp and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zusammenfassung: Searches for charged Higgs bosons decaying to a tau lepton and a neutrino in fully hadronic final states are presented in this thesis. The analyses are based on 4.6fb^-1 and 19.5fb^-1 of proton-proton collision data taken with the ATLAS detector at the LHC at center-of-mass energies of 7TeV and 8TeV in 2011 and 2012, respectively.Charged Higgs bosons with masses less than the top quark mass are searched for in events consistent with top-quark pair production and charged Higgs bosons with masses greater than the top quark mass are searched for in associated production with a top quark.In the search based on data taken in 2011, all background contributions are estimated in data-driven ways. Only a minor background contribution is estimated using simulation in the searches based on data taken in 2012; all dominant background contributions are estimated using data-driven methods here as well. An embedding method is used in all searches to assess the dominant and irreducible background contributions containing true hadronically decaying tau leptons and described in detail in this thesis.No significant excess of the data compared to the background expectations due to Standard Model processes is observed. Statistical analyses lead to 95% confidence-level upper limits on the branching ratios B(t->bH^±)xB(H^±->tau^± nu) between 0.23% and 1.3% for charged Higgs boson masses between 80GeV and 160GeV and on the production cross section times branching ratio, sigma(pp->tH^±+X)xB(H^±->tau^± nu) ranging from 0.76pb to 4.5fb for charged Higgs boson masses between 180GeV and 1000GeV. The branching ratio and cross section limits are used to derive constraints on the parameter space of minimal supersymmetric extensions of the Standard Model in various benchmark scenarios. These limits are the so far strictest limits set by the ATLAS collaboration in the search for charged Higgs bosons in fully hadronic final states
Book Synopsis Search for the Associated Production of the Higgs Boson with a Top Quark Pair in Multilepton Final States with the ATLAS Detector by :
Download or read book Search for the Associated Production of the Higgs Boson with a Top Quark Pair in Multilepton Final States with the ATLAS Detector written by and published by . This book was released on 2015 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Light Charged Higgs Bosons in Hadronic Τ [tau] Final States with the ATLAS Detector by : Thies Ehrich
Download or read book Search for Light Charged Higgs Bosons in Hadronic Τ [tau] Final States with the ATLAS Detector written by Thies Ehrich and published by . This book was released on 2010 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Light Charged Higgs Bosons in Hadronic _t63 [tau] Final States with the ATLAS Detector by : Thies Ehrich
Download or read book Search for Light Charged Higgs Bosons in Hadronic _t63 [tau] Final States with the ATLAS Detector written by Thies Ehrich and published by . This book was released on 2010 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Charged Higgs Bosons Decaying Into Top and Bottom Quarks with Single-lepton Final States Using Pp Collisions Collected at a Centre-of-mass Energy of 13 TeV by the ATLAS Detector by : Francesco Peri
Download or read book Search for Charged Higgs Bosons Decaying Into Top and Bottom Quarks with Single-lepton Final States Using Pp Collisions Collected at a Centre-of-mass Energy of 13 TeV by the ATLAS Detector written by Francesco Peri and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Searches for Associated Higgs Boson Production with Top Quark Pair and Higgs Pair Production in Multi Lepton Final States with the ATLAS Detector by : Merve Nazlim Agaras
Download or read book Searches for Associated Higgs Boson Production with Top Quark Pair and Higgs Pair Production in Multi Lepton Final States with the ATLAS Detector written by Merve Nazlim Agaras and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the discovery of the Higgs boson at a mass around 125 GeV by both ATLAS and CMS collaborations in July 2012, it became crucial to measure its properties, such as its couplings to other particles, and search for any deviations from the Standard Model (SM) predictions. The top quark Yukawa coupling is close to unity and the strongest in the fermionic sector. Therefore, this coupling plays a crucial role in the theory. Determination of the associated production of The Higgs boson production with a pair of top quarks (ttH) offers a tree-level access to measuring this coupling. The analysis of ttH production at ATLAS experiment exploits several Higgs decay channel, together with different top quark decay modes. In this thesis, the study of the ttH (H → Multi lepton) process is presented in the topology where the Higgs decays to WW,ZZ or tautau, using a dataset corresponding to an integrated luminosity of 79.8fb^-1 at √s = 13 TeV, collected with the ATLAS detector between 2015-2017. Improved knowledge on the background modelling and the complex fit model is used with many degrees of freedoms. Particularly different fit setups are presented in order to understand the modelling of the major irreducible background, ttW. Furthermore, a search for the SM Higgs boson pair production in the multi lepton final states is presented. The search uses 139fb^-1 of proton-proton collisions data at a centre-of-mass energy of 13 TeV provided by the Large Hadron Collider (LHC) and recorded by the ATLAS experiment in 2015 and 2018. The first studies in two lepton same-sign channel is performed for lepton working point optimisation and estimation of background contributions. Template fit method is applied to estimated the reducible backgrounds and preliminary expected upper limit is calculated.
Book Synopsis Search for Light Charged Higgs Bosons Via T->H+ B, with H+ -> Cb in Lepton+jets Final State at Center-of-mass Energy 13 TeV with the ATLAS Detector by : 彭琛
Download or read book Search for Light Charged Higgs Bosons Via T->H+ B, with H+ -> Cb in Lepton+jets Final State at Center-of-mass Energy 13 TeV with the ATLAS Detector written by 彭琛 and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Search for Higgs Bosons in Final States with Multiple Tau Leptons at the DZero Experiment by : Louise Suter
Download or read book A Search for Higgs Bosons in Final States with Multiple Tau Leptons at the DZero Experiment written by Louise Suter and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two searches for the production of Higgs bosons decaying into tau and mu leptons, using data collected with the DZero detector at the Fermilab Tevatron p-bar(p)collider, are presented. A search for the pair production of doubly charged Higgs bosons in the processq-bar(q) to H {++}H {--}, where H {++} decays to tau-tau, mu-mu or tau-mu lepton pairs, with an integrated luminosity of up to L= 7.0 fb {-1}, is presented. No significant excess of data over the expected SM background is observed and the results are used to set 95\% C.L. limits on the pair production cross section of doubly charged Higgs bosons in the range 90
Book Synopsis Search for Charged Higgs Bosons with the ATLAS Detector at the LHC by : Patrick Czodrowski
Download or read book Search for Charged Higgs Bosons with the ATLAS Detector at the LHC written by Patrick Czodrowski and published by . This book was released on 2013 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for a Charged Higgs Boson in Proton-proton Collisions at the LHC Using the ATLAS Detector by :
Download or read book Search for a Charged Higgs Boson in Proton-proton Collisions at the LHC Using the ATLAS Detector written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Higgs Bosons Decaying Into New Spin-0 Or Spin-1 Particles in Four-lepton Final States with the ATLAS Detector with 139 Fb−1 of Pp Collision Data at [square Root]s by : [Study Group] ATLAS Collaboration CERN
Download or read book Search for Higgs Bosons Decaying Into New Spin-0 Or Spin-1 Particles in Four-lepton Final States with the ATLAS Detector with 139 Fb−1 of Pp Collision Data at [square Root]s written by [Study Group] ATLAS Collaboration CERN and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Standard Model Higgs Bosons Produced in Association with Top-quark Pairs in TtH Multilepton Final States Using the ATLAS Detector at the LHC. by :
Download or read book Search for Standard Model Higgs Bosons Produced in Association with Top-quark Pairs in TtH Multilepton Final States Using the ATLAS Detector at the LHC. written by and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Doubly Charged Higgs Bosons with Lepton-flavour-violating Decays Involving Tau Leptons by :
Download or read book Search for Doubly Charged Higgs Bosons with Lepton-flavour-violating Decays Involving Tau Leptons written by and published by . This book was released on 2007 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors search for pair production of doubly charged Higgs particles (H{sup ±±}) followed by decays into electron-tau (e[tau]) and muon-tau ([mu][tau]) pairs using a data set corresponding to an integrated luminosity of 350 pb−1 collected from {bar p}p collisions at √s = 1.96 TeV by the CDF II experiment. They search separately for cases where three or four final-state leptons are detected, and then combine the results into limits for each exclusive flavor decay mode of the H{sup ±±}. Assuming 100% branching ratios of the H{sup {+-}{+-}} to left-handed e[tau] ([mu][tau]) pairs, they set an H{sup {+-}{+-}} lower mass limit of 114 (112) GeV/c2 at the 95% confidence level (C.L.).
Book Synopsis Studies of the Higgs Boson Properties and Search for New Physics Beyond the Standard Model in the Top Sector with the ATLAS Detector by : Grigore Tarna
Download or read book Studies of the Higgs Boson Properties and Search for New Physics Beyond the Standard Model in the Top Sector with the ATLAS Detector written by Grigore Tarna and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proton-proton collisions at a center of mass energy of 13 TeV recorded during 2015-2017 with the ATLAS detector at LHC are analyzed in this thesis. The first part of the thesis details electron efficiency measurements with a Tag-and-Probe method in Z->ee events. The measured electron reconstruction efficiency varies between 97\% (15E_T25 GeV) up to 99\% at higher E_T with an uncertainty of around 1\% and per-mile level, respectively. The electron efficiency of a new algorithm (PLI and PLV) designed to reduce the electrons originating from heavy flavor decays is found to be 60-70\% at low E_T (E_T20 GeV) increasing up to 95\% at higher E_T. The second part of the thesis covers a search for flavor-changing neutral currents (FCNC) in top decays to an up-type quark (u or c) and a Higgs boson (t-Hu or t-Hc) using the 2015-2016 data. These processes are strongly suppressed in the Standard Model (SM), however larger enhancements are predicted in new physics models. Multivariate analyses (MVA) are used to improve signal-background separation in multilepton final states. The measured branching ratio for the t-Hu (t->Hc) process is found to be compatible with zero and a 95\% confidence level upper limit is set at 0.19\% (0.16\%) with an expected limit of 0.15\% (0.15\%), the best limit in a single channel to date.The Higgs boson production in association with a top quark pair (ttH) allows direct access to the top Yukawa coupling. The ttH production mode was observed by the ATLAS and CMS experiments, independently, by combining several decay channels. Further efforts to measure ttH in the two leptons same-sign channel are discussed in the last part of the thesis.
Book Synopsis Searching for the Higgs Boson Produced in Association with a Pair of Top Quarks in Multilepton Final States Using the ATLAS Detector at the LHC. by : David Anthony DeMarco
Download or read book Searching for the Higgs Boson Produced in Association with a Pair of Top Quarks in Multilepton Final States Using the ATLAS Detector at the LHC. written by David Anthony DeMarco and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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