Search For A Heavy Cp Odd Higgs Boson A Decaying To A Z Boson And A Heavy Cp Even Higgs Boson H With Llbb Final State In 13 Tev Pp Collisions With The Atlas Detector
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Search For A Heavy Cp Odd Higgs Boson A Decaying To A Z Boson And A Heavy Cp Even Higgs Boson H With Llbb Final State In 13 Tev Pp Collisions With The Atlas Detector
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Author : Wai Yuen Chan
language : en
Publisher:
Release Date : 2021
Search For A Heavy Cp Odd Higgs Boson A Decaying To A Z Boson And A Heavy Cp Even Higgs Boson H With Llbb Final State In 13 Tev Pp Collisions With The Atlas Detector written by Wai Yuen Chan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Search For A Cp Odd Higgs Boson Decaying To Zh In Pp Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2015
Search For A Cp Odd Higgs Boson Decaying To Zh In Pp Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
A search for a heavy, CP-odd Higgs boson, A, decaying into a Z boson and a 125 GeV Higgs boson, h, with the ATLAS detector at the LHC is presented. The search uses proton–proton collision data at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 20.3fb-1. Decays of CP-even h bosons to ?? or bb pairs with the Z boson decaying to electron or muon pairs are considered, as well as h → bb decays with the Z boson decaying to neutrinos. No evidence for the production of an A boson in these channels is found and the 95% confidence level upper limits derived for ?(gg → A) × BR(A → Zh) × BR(h → f¯f) are 0.098–0.013pb for f = ? and 0.57–0.014 pb for f = b in a range of mA=220–1000 GeV. The results are combined and interpreted in the context of two-Higgs-doublet models.
Search For A Cp Odd Higgs Boson Decaying To Z H In Pp Collisions At Square Root S
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Author : Hannah Arnold
language : en
Publisher:
Release Date : 2018
Search For A Cp Odd Higgs Boson Decaying To Z H In Pp Collisions At Square Root S written by Hannah Arnold and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Abstract: In this thesis a search for a CP-odd Higgs boson A decaying into a Z boson and a neutral CP-even Higgs boson h with a mass of 125 GeV is described. The search is based on proton-proton collision data at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector in the years 2015 and 2016 corresponding to an integrated luminosity of 36/fb. Final states, where the Z boson decays into pairs of electrons, muons or neutrinos and the h boson into bottom-quark pairs, are considered. The presence of neutrinos is inferred by a momentum imbalance in the transverse plane, the bottom-quark pairs are reconstructed either as two small-radius or one large-radius calorimeter jet(s). The reconstructed invariant or transverse mass distributions of the Zh candidates are searched for the presence of localised excesses above the expectation from known Standard Model processes. No evidence for an A-boson signal is found. Upper limits on the A-boson production cross-section times the branching fractions for A-boson decays into Zh and h-boson decays to bottom-quark pairs are derived at the 95% confidence level for A bosons with masses between 220 GeV and 2 TeV; they range between 0.0019 pb and 0.81 pb. The results are interpreted in the context of Two-Higgs-Doublet Models. Furthermore, a novel method to calibrate the b-tagging efficiency for c-quark jets is described. It is demonstrated for the standard b-tagging algorithm of the ATLAS experiment in Run 1 using proton-proton collision data at a centre-of-mass energy of 7 TeV collected with the ATLAS detector in the year 2011. The calibration uses a sample of c jets obtained from events, where a W boson is produced in association with a single c quark; the resulting c jet is identified by a muon stemming from the semileptonic c-hadron decay. The measured c-jet tagging efficiencies are presented relative to the corresponding efficiencies in simulated W+c events as scale factors. The measured scale factors are extrapolated using a simulation-based and data-supported procedure to obtain scale factors valid for inclusive samples of c jets. Their uncertainties range between 5% and 13 %.
Search For A Very Light Cp Odd Higgs Boson In Top Quark Decays From P P Collisions At 1 96 Tev
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Author :
language : en
Publisher:
Release Date : 2011
Search For A Very Light Cp Odd Higgs Boson In Top Quark Decays From P P Collisions At 1 96 Tev written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
We present the results of a search for a very light CP-odd Higgs boson a1° originating from top quark decays t → H{sup {+-}}b → W{sup {+-}(*)} a1° b, and subsequently decaying into??−. Using a data sample corresponding to an integrated luminosity of 2.7 fb−1 collected by the CDF II detector in p{bar p} collisions at 1.96 TeV, we perform a search for events containing a lepton, three or more jets, and an additional isolated track with transverse momentum in the range 3 to 20 GeV/c. Observed events are consistent with background sources, and 95% C.L. limits are set on the branching ratio of t → H{sup {+-}}b for various masses of H{sup {+-}} and a1°.
Searches For Beyond Standard Model Higgs Bosons In Pp Collisions At Square Root Of S
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Author : Pedro H. Sales de Bruin
language : en
Publisher:
Release Date : 2016
Searches For Beyond Standard Model Higgs Bosons In Pp Collisions At Square Root Of S written by Pedro H. Sales de Bruin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Higgs bosons categories.
The searches for a Beyond Standard Model (BSM) heavy CP-odd Higgs boson A decaying to Zh in the context of two-Higgs-doublet models (2HDM), and Minimal Supersymmetric Standard Model (MSSM) neutral Higgs bosons H/A decaying to a tau pair are presented. The search for the heavy CP-odd Higgs boson, A, is conducted through the A -> Zh -> ll T[subscript]lep T[subscript]had decay channel using 20.3 fb−1 of proton-proton collision data collected by the ATLAS detector at a center-of-mass of 8 TeV. The search for the neutral MSSM H/A decaying to a tau pair in the T[subscript]lep T[subscript]had b-veto final state is done using 3.2 fb−1 of proton-proton collision data recorded by the ATLAS detector at a center-of-mass of 13 TeV. The observed data agrees with the Standard Model background prediction, and upper limits are set on cross-section times branching ratio of neutral BSM Higgs bosons.
Search For Higgs Bosons Decaying To Aa In The Mu Mu Tau Tau Final State In Pp Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For Higgs Bosons Decaying To Aa In The Mu Mu Tau Tau Final State In Pp Collisions At Arrow written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
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. 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.
Search For Higgs Bosons Decaying To Aa In The Final State In Pp Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2015
Search For Higgs Bosons Decaying To Aa In The Final State In Pp Collisions At U221a S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
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 √s = 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 ? leptons. No significant excess is observed above the expected backgrounds in the dimuon invariant mass range from 3.7 to 50 GeV. Upper limits are placed on the production of h → aa relative to the standard model gg → 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 → aa from 2.33 to 0.72 pb, for fixed ma = 5 GeV with mH ranging from 100 to 500 GeV.
Search For A Very Light Cp Odd Higgs Boson In Top Quark Decays From Pp Collisions At S
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Author :
language : en
Publisher:
Release Date : 2011
Search For A Very Light Cp Odd Higgs Boson In Top Quark Decays From Pp Collisions At S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
We present the results of a search for a very light CP-odd Higgs boson a10 originating from top quark decays t→H±b → W±(*)a10b, and subsequently decaying into [tau]+[tau]-. Using a data sample corresponding to an integrated luminosity of 2.7 fb-1 collected by the CDF II detector in pp̄ collisions at 1.96 TeV, we perform a search for events containing a lepton, three or more jets, and an additional isolated track with transverse momentum in the range 3 to 20 GeV/c. Observed events are consistent with background sources, and 95% C.L. limits are set on the branching ratio of t→H±b for various masses of H± and a10.
Search For A Cp Odd Higgs Boson Decaying To Z H In Pp Collisions At Square Root S
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Author : Hannah Arnold
language : en
Publisher:
Release Date : 2018
Search For A Cp Odd Higgs Boson Decaying To Z H In Pp Collisions At Square Root S written by Hannah Arnold and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with categories.
Analysis Of The Higgs Boson Decay In The H Had Had Channel And Cp Properties With S
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Author : Stephanie P. Y. Yuen
language : en
Publisher:
Release Date : 2019
Analysis Of The Higgs Boson Decay In The H Had Had Channel And Cp Properties With S written by Stephanie P. Y. Yuen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.