Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At Sqrt S
DOWNLOAD
Download Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At Sqrt S PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At Sqrt S book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At Sqrt S
DOWNLOAD
Author : Gregor Kasieczka
language : en
Publisher:
Release Date : 2013
Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At Sqrt S written by Gregor Kasieczka and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At S 327 7 Tev
DOWNLOAD
Author : Gregor Kasieczka
language : en
Publisher:
Release Date : 2013
Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At S 327 7 Tev written by Gregor Kasieczka and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Search For New Phenomena With Top Quark Pairs In Final States With One Lepton Jets And Missing Transverse Momentum In Pp Collisions At Square Root S
DOWNLOAD
Author : ATLAS Collaboration CERN
language : en
Publisher:
Release Date : 2021
Search For New Phenomena With Top Quark Pairs In Final States With One Lepton Jets And Missing Transverse Momentum In Pp Collisions At Square Root S written by ATLAS Collaboration CERN 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.
Abstract: A search for new phenomena with top quark pairs in final states with one isolated electron or muon, multiple jets, and large missing transverse momentum is performed. Signal regions are designed to search for two-, three-, and four-body decays of the directly pair-produced supersymmetric partner of the top quark (stop). Additional signal regions are designed specifically to search for spin-0 mediators that are produced in association with a pair of top quarks and decay into a pair of dark-matter particles. The search is performed using the Large Hadron Collider proton-proton collision dataset at a centre-of-mass energy of s√ = 13 TeV recorded by the ATLAS detector from 2015 to 2018, corresponding to an integrated luminosity of 139 fb−1. No significant excess above the Standard Model background is observed, and limits at 95% confidence level are set in the stop-neutralino mass plane and as a function of the mediator mass or the dark-matter particle mass. Stops are excluded up to 1200 GeV (710 GeV) in the two-body (three-body) decay scenario. In the four-body scenario stops up to 640 GeV are excluded for a stop-neutralino mass difference of 60 GeV. Scalar and pseudoscalar dark-matter mediators are excluded up to 200 GeV when the coupling strengths of the mediator to Standard Model and dark-matter particles are both equal to one and when the mass of the dark-matter particle is 1 GeV
Search For Heavy Resonances Decaying To Top Quark Pairs In The Boosted All Hadronic Decay Channel
DOWNLOAD
Author : Trisha Farooque
language : en
Publisher:
Release Date : 2013
Search For Heavy Resonances Decaying To Top Quark Pairs In The Boosted All Hadronic Decay Channel written by Trisha Farooque and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Search For Heavy Resonance Decays Into Top Quark Pairs Using A Lepton Plus Jets Final State In Proton Proton Collisions At S
DOWNLOAD
Author : Kyle Krowpman
language : en
Publisher:
Release Date : 2022
Search For Heavy Resonance Decays Into Top Quark Pairs Using A Lepton Plus Jets Final State In Proton Proton Collisions At S written by Kyle Krowpman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Electronic dissertations categories.
This thesis presents two studies in a search for new heavy resonances with 139 fb-1 of proton-proton collisions delivered by the Large Hadron Collider at √s = 13 TeV as measured by the ATLAS detector. In many Standard Model extensions, the top quark plays an important role in the dynamics of electroweak symmetry breaking, and so the studies presented here focus on heavy resonance searches in the top-antitop decay channel and their combination with searches for heavy resonances decaying into other final states. The first study detailed in this thesis is a search for new heavy resonances in a semileptonically decaying top-antitop final state where no significant excesses of data were observed with respect to the background prediction. That being so, exclusion limits at the 95% confidence level were placed on possible resonant masses for a Z′ in a leptophobic topcolor-assisted technicolor model and for a bulk Randall-Sundrum graviton at 4.2 TeV and 1.0 TeV, respectively. This top-antitop search was combined with searches in orthogonal final states performed by the ATLAS Collaboration from which limit contours were placed at the 95% confidence level in the space of couplings to Standard Model particles for the Heavy Vector Triplet model.
A Search For T Overline T Resonances Using Lepton Plus Jets Events In Proton Proton Collisions At Sqrt S
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2015
A Search For T Overline T Resonances Using Lepton Plus Jets Events 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 new particles that decay into top quark pairs is reported. The search is performed with the ATLAS experiment at the LHC using an integrated luminosity of 20.3 fb-1 of proton-proton collision data collected at a centre-of-mass energy of \(\sqrt{s}=8 \) TeV. The lepton-plus-jets final state is used, where the top pair decays to \({W}^{+}b{W}^{-}\overline{b} \), with one W boson decaying leptonically and the other hadronically. The invariant mass spectrum of top quark pairs is examined for local excesses or deficits that are inconsistent with the Standard Model predictions. No evidence for a top quark pair resonance is found, and 95% confidence-level limits on the production rate are determined for massive states in benchmark models. The upper limits on the cross-section times branching ratio of a narrow Z' boson decaying to top pairs range from 4.2 pb to 0.03 pb for resonance masses from 0.4 TeV to 3.0 TeV. A narrow leptophobic topcolour Z' boson with mass below 1.8 TeV is excluded. Upper limits are set on the cross-section times branching ratio for a broad colour-octet resonance with [Gamma]/m = 15% decaying to \(t\overline{t} \). These range from 4.8 pb to 0.03 pb for masses from 0.4 TeV to 3.0 TeV. A Kaluza-Klein excitation of the gluon in a Randall-Sundrum model is excluded for masses below 2.2 TeV.
Search For Pair Produced Resonances Decaying To Jet Pairs In Proton U2013 Proton Collisions At Sqrt S
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2015
Search For Pair Produced Resonances Decaying To Jet Pairs In Proton U2013 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.
Results are reported of a general search for pair production of heavy resonances decaying to pairs of hadronic jets in events with at least four jets. The study is based on up to 19.4 fb–1 of integrated luminosity from proton–proton collisions at a center-of-mass energy of 8 TeV, recorded with the CMS detector at the LHC. Limits are determined on the production of scalar top quarks (top squarks) in the framework of R-parity violating supersymmetry and on the production of color-octet vector bosons (colorons). First limits at the LHC are placed on top squark production for two scenarios. The first assumes decay to a bottom quark and a light-flavor quark and is excluded for masses between 200 and 385 GeV, and the second assumes decay to a pair of light-flavor quarks and is excluded for masses between 200 and 350 GeV at 95% confidence level. Furthermore, previous limits on colorons decaying to light-flavor quarks are extended to exclude masses from 200 to 835 GeV.
Search For Mathrm T Bar T Resonances In Highly Boosted Lepton Jets And Fully Hadronic Final States In Proton Proton Collisions At Sqrt S
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2017
Search For Mathrm T Bar T Resonances In Highly Boosted Lepton Jets And Fully Hadronic Final States 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 2017 with categories.
A search for the production of heavy resonances decaying into top quark-antiquark pairs is presented. The analysis is performed in the lepton+jets and fully hadronic channels using data collected in proton-proton collisions at $\sqrt{s}$ =13 TeV using the CMS detector at the LHC, corresponding to an integrated luminosity of 2.6 inverse femtobarns. The selection is optimized for massive resonances, where the top quarks have large Lorentz boosts. No evidence for resonant ttbar production is found in the data, and upper limits on the production cross section of heavy resonances are set. The exclusion limits for resonances with masses above 2 TeV are significantly improved compared to those of previous analyses at $\sqrt{s}$ = 8 TeV.
Search For Massive Supersymmetric Particles Decaying To Many Jets Using The Atlas Detector In Pp Collisions At Root S
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2015
Search For Massive Supersymmetric Particles Decaying To Many Jets Using The Atlas Detector In Pp Collisions At Root 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.
Results of a search for decays of massive particles to fully hadronic final states are presented. This search uses 20.3 fb-1 of data collected by the ATLAS detector in [arrow]" TeV proton-proton collisions at the LHC. Signatures based on high jet multiplicities without requirements on the missing transverse momentum are used to search for R-parity-violating supersymmetric gluino pair production with subsequent decays to quarks. Our analysis was performed using a requirement on the number of jets, in combination with separate requirements on the number of b-tagged jets, as well as a topological observable formed from the scalar sum of the mass values of large-radius jets in the event. Results were interpreted in the context of all possible branching ratios of direct gluino decays to various quark flavors. No significant deviation is observed from the expected Standard Model backgrounds estimated using jet counting as well as data-driven templates of the total-jet-mass spectra. Gluino pair decays to ten or more quarks via intermediate neutralinos are excluded for a gluino with mass mg~
Searches For New Resonances Decaying To Top Antitop Quark Pairs With The Atlas Detector In Sqrt S
DOWNLOAD
Author : Stephen Swedish
language : en
Publisher:
Release Date : 2014
Searches For New Resonances Decaying To Top Antitop Quark Pairs With The Atlas Detector In Sqrt S written by Stephen Swedish and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.