Search For Single Production Of A Vector Like Partner Of The Bottom Quark In The Bh Bb Final State In Pp Collisions At S
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Search For Single Production Of A Vector Like Partner Of The Bottom Quark In The Bh Bb Final State In Pp Collisions At S
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Author : Marco Montella
language : en
Publisher:
Release Date : 2021
Search For Single Production Of A Vector Like Partner Of The Bottom Quark In The Bh Bb Final State In Pp Collisions At S written by Marco Montella 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 Pair Produced Vector Like B Quarks In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Search For Pair Produced Vector Like B Quarks In Proton Proton Collisions At Sqrt 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 production of a heavy B quark, having electric charge -1/3 and vector couplings to W, Z, and H bosons, is carried out using proton-proton collision data recorded at the CERN LHC by the CMS experiment, corresponding to an integrated luminosity of 19.7 fb-1 . The B quark is assumed to be pair-produced and to decay in one of three ways: to tW, bZ, or bH. The search is carried out in final states with one, two, and more than two charged leptons, as well as in fully hadronic final states. Each of the channels in the exclusive final-state topologies is designed to be sensitive to specific combinations of the B quark-antiquark pair decays. The observed event yields are found to be consistent with the standard model expectations in all the fi- nal states studied. Our statistical combination of these results was performed and upper limits were set on the cross section of the strongly produced B quark-antiquark pairs as a function of the B quark mass. Additionally, lower limits on the B quark mass between 740 and 900 GeV are set at a 95% confidence level, depending on the values of the branching fractions of the B quark to tW, bZ, and bH. Overall, these limits are the most stringent to date.
Search For Single Production Of A Vector Like Quark Via A Heavy Gluon In The 4b Final State With The Atlas Detector In Pp Collisions At Mml
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Author :
language : en
Publisher:
Release Date : 2016
Search For Single Production Of A Vector Like Quark Via A Heavy Gluon In The 4b Final State With The Atlas Detector In Pp Collisions At Mml written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
In this study, a search is performed for the process pp → G* → BH$\bar{b}$/$\bar{B}$Hb → H$b\bar{b}$→ $b\bar{b}b\bar{b}$, predicted in composite Higgs scenarios, where G* is a heavy colour octet vector resonance and BHBH a vector-like quark of charge -1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb-1, recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of mG* vs. mBH.
Search For Single Production Of A Vector Like Quark Via A Heavy Gluon In The 4b Final State With The Atlas Detector In Pp Collisions At
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Author :
language : en
Publisher:
Release Date : 2016
Search For Single Production Of A Vector Like Quark Via A Heavy Gluon In The 4b Final State With The Atlas Detector In Pp Collisions At written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
In this study, a search is performed for the process pp → G* → BH$ar{b}$/$ar{B}$Hb → H$bar{b}$→ $bar{b}bar{b}$, predicted in composite Higgs scenarios, where G* is a heavy colour octet vector resonance and BHBH a vector-like quark of charge –1/3. The data were obtained from pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.5 fb–1, recorded by the ATLAS detector at the LHC. The largest background, multijet production, is estimated using a data-driven method. No significant excess of events with respect to Standard Model predictions is observed, and upper limits on the production cross section times branching ratio are set. Comparisons to the predictions from a specific benchmark model are made, resulting in lower mass limits in the two-dimensional mass plane of mG* vs. mBH.
Search For The Production Of A Single Excited B Quark In The Wt Final State With A Single Lepton In Pp Collisions At Sqrt S
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Author : Dennis Sperlich
language : en
Publisher:
Release Date : 2021
Search For The Production Of A Single Excited B Quark In The Wt Final State With A Single Lepton In Pp Collisions At Sqrt S written by Dennis Sperlich 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 The Production Of A Single Excited B Quark In The Wt Final State With A Single Lepton In Pp Collisions At S
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Author : Dennis Sperlich
language : en
Publisher:
Release Date : 2020*
Search For The Production Of A Single Excited B Quark In The Wt Final State With A Single Lepton In Pp Collisions At S written by Dennis Sperlich and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020* with categories.
Search For The Production Of An Excited Bottom Quark Decaying To Tw In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2015
Search For The Production Of An Excited Bottom Quark Decaying To Tw In Proton Proton Collisions At Sqrt 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.
Our search is presented for a singly produced excited bottom quark (b*) decaying to a top quark and a W boson in the all-hadronic, lepton+jets, and dilepton final states in proton-proton collisions at √s = 8 TeV recorded by the CMS experiment at the CERN LHC. Data corresponding to an integrated luminosity of 19.7 fb-1 are used. No significant excess of events is observed with respect to standard model expectations. We set limits at 95% confidence on the product of the b* quark production cross section and its branching fraction to tW. Furthermore, the cross section limits are interpreted for scenarios including left-handed, right-handed, and vector-like couplings of the b* quark and are presented in the two-dimensional coupling plane based on the production and decay coupling constants. The masses of the left-handed, right-handed, and vectorlike b* quark states are excluded at 95% confidence below 1390, 1430, and 1530 GeV, respectively, for benchmark couplings. This analysis gives the most stringent limits on the mass of the b* quark to date.
A Search For Bottom Type Vector Like Quark Pair Production In A Fully Hadronic Final State In Proton Proton Collisions At S
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Author : Albert M. Sirunyan
language : en
Publisher:
Release Date : 2020
A Search For Bottom Type Vector Like Quark Pair Production In A Fully Hadronic Final State In Proton Proton Collisions At S written by Albert M. Sirunyan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
Search For Single Vector Like Quarks In P Bar P Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2010
Search For Single Vector Like Quarks In P Bar P Collisions At Sqrt 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 2010 with categories.
We present a search for hypothetical vector-like quarks in p{bar p} collisions at (square root)s = 1.96 TeV. The data were collected by the D0 detector at the Fermilab Tevatron Collider and correspond to an integrated luminosity of 5.4 fb−1. We select events with a final state composed of a W or Z boson and a jet consistent with a heavy object decay. We observe no significant excess in comparison to the background prediction and set limits on production cross sections for vector-like quarks decaying to W+jet and Z+jet. Assuming a vector-like quark to standard model quark coupling parameter {tilde {kappa}}{sub qQ} of unity, we exclude vector-like quarks with mass below 693 GeV for decays to W+jet and mass below 449 GeV for decays to Z+jet. These are the most stringent mass limits for electroweak single vector-like quark production at hadron colliders.
Search For A Heavy Bottom Like Quark In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2011
Search For A Heavy Bottom Like Quark In Pp Collisions At Sqrt 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.
A search for pair-produced bottom-like quarks in pp collisions at sqrt(s) = 7 TeV is conducted with the CMS experiment at the LHC. The decay b' to tW is considered in this search. The b' b'-bar to tW-̂ t-bar W+̂ process can be identified by the distinctive signature of trileptons and same-sign dileptons. With a data sample corresponding to an integrated luminosity of 34 inverse picobarns, no excess above the standard model background predictions is observed and a b' quark with a mass between 255 and 361 GeV/c2̂ is excluded at the 95% confidence level.