Measurement Of Jets Produced In Top Quark Events Using The Emu Final State With 2 B Tagged Jets In Pp Collisions At 8 Tev With The Atlas Detector
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Measurement Of Jets Produced In Top Quark Events Using The Emu Final State With 2 B Tagged Jets In Pp Collisions At 8 Tev With The Atlas Detector
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Author : Jacquelyn Kay Brosamer
language : en
Publisher:
Release Date : 2016
Measurement Of Jets Produced In Top Quark Events Using The Emu Final State With 2 B Tagged Jets In Pp Collisions At 8 Tev With The Atlas Detector written by Jacquelyn Kay Brosamer 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.
The transverse momentum and multiplicity of jets produced in top quark events are measured using 20.3 inverse fb of pp collision data at a center-of-mass energy of 8 tev. Jets are selected from top events requiring an opposite-charge $e\mu$ pair and two b-tagged jets in the final state. The data are corrected to obtain the particle-level fiducial cross section for additional jets with rank 1-4, where rank=1 is the leading additional jet. These distributions are used to obtain the extra jet multiplicity as a function of minimum jet pt threshold. The results are compared with several next to leading order Monte Carlo generators. The resulting measurements can be used to tune Monte Carlo QCD modelling and may also reduce associated modelling uncertainties for LHC top quark physics measurements.
Measurement Of Jet Activity In Top Quark Events Using The E Mu Final State With Two B Tagged Jets In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2016
Measurement Of Jet Activity In Top Quark Events Using The E Mu Final State With Two B Tagged Jets 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 2016 with categories.
Measurement Of The Top Quark Mass In All Jets T Bar T Events In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2013
Measurement Of The Top Quark Mass In All Jets T Bar T Events 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 2013 with categories.
The mass of the top quark is measured using a sample of $t\bar{t}$ candidate events with at least six jets in the final state. The sample is selected from data collected with the CMS detector in pp collisions at $\sqrt{s}$ = 7 TeV in 2011 and corresponds to an integrated luminosity of 3.54 inverse femtobarns. The mass is reconstructed for each event employing a kinematic fit of the jets to a $t\bar{t}$ hypothesis. The top-quark mass is measured to be 173.49 $\pm$ 0.69 (stat.) $\pm$ 1.21 (syst.) GeV. A combination with previously published measurements in other decay modes by CMS yields a mass of 173.54 $\pm$ 0.33 (stat.) $\pm$ 0.96 (syst.) GeV.
Search For Massive Supersymmetric Particles Decaying To Many Jets Using The Atlas Detector In Pp Collisions At Arrow
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Author :
language : en
Publisher:
Release Date : 2015
Search For Massive Supersymmetric Particles Decaying To Many Jets Using The Atlas Detector 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.
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]" = 8 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. The analysis is 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 are 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 m-g
Search For Massive Supersymmetric Particles Decaying To Many Jets Using The Atlas Detector In Pp Collisions At U221a S
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Author :
language : en
Publisher:
Release Date : 2015
Search For Massive Supersymmetric Particles Decaying To Many Jets Using The Atlas Detector 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.
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 √s=8 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. The analysis is 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. The results are 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˜1 TeV for a neutralino mass msub?sup˜0/supsub1/sub/sub=500 GeV. Direct gluino decays to six quarks are excluded for msubg˜
Measurement Of The Jet Mass In Highly Boosted T Tbar Events From Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2017
Measurement Of The Jet Mass In Highly Boosted T Tbar Events From 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 2017 with categories.
The first measurement of the jet mass m[jet] of top quark jets produced in t t-bar events from pp collisions at sqrt(s) = 8 TeV is reported for the jet with the largest transverse momentum pt in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7 inverse femtobarns. The measurement is performed in the lepton+jets channel in which the products of the semileptonic decay t to bW with W to l nu where l is an electron or muon, are used to select t t-bar events with large Lorentz boosts. The products of the fully hadronic decay t to bW with W to q q'-bar are reconstructed using a single Cambridge-Aachen jet with distance parameter R=1.2, and pt>400 GeV. The t t-bar cross section as a function of m[jet] is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the m[jet] distribution is sensitive to the top quark mass m[t], and the data are used to extract a value of m[t] to assess this sensitivity.
Measurement Of The Top Quark Pole Mass And Qcd Radiation In Tt Pair Production Using E Events With B Tagged Jets In Pp Collisions At S
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Author : Caroline Maria Bertsche
language : en
Publisher:
Release Date : 2015
Measurement Of The Top Quark Pole Mass And Qcd Radiation In Tt Pair Production Using E Events With B Tagged Jets In Pp Collisions At S written by Caroline Maria Bertsche and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Collisions (Nuclear physics) categories.
Measurement Of The Top Quark Mass From B Tagged Events In The Lepton Plus Jets Channel In Pp Collisions At Square Root Of S
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Author : Nathan Robert-Claire Eddy
language : en
Publisher:
Release Date : 1999
Measurement Of The Top Quark Mass From B Tagged Events In The Lepton Plus Jets Channel In Pp Collisions At Square Root Of S written by Nathan Robert-Claire Eddy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Measurements Of The Top Quark Pair Production Cross Section In Lepton Jets Final States Using A Topological Multivariate Technique As Well As Lifetime B Tagging In Proton Anti Proton Collisions At S 1 2
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Author :
language : en
Publisher:
Release Date : 2006
Measurements Of The Top Quark Pair Production Cross Section In Lepton Jets Final States Using A Topological Multivariate Technique As Well As Lifetime B Tagging In Proton Anti Proton Collisions At S 1 2 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.
Abstract Not Provided.
Measurement Of The Top Quark Mass In P Bar P Collisions Using Events With Two Leptons
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Author :
language : en
Publisher:
Release Date : 2012
Measurement Of The Top Quark Mass In P Bar P Collisions Using Events With Two Leptons written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
We present a measurement of the top quark mass (m{sub t}) in p{bar p} collisions at √s = 1.96 TeV using t{bar t} events with two leptons (ee, e? or??) in the final state in 4.3 fb−1 of data collected with the D0 detector at the Fermilab Tevatron collider. We analyze the kinematically underconstrained dilepton events by integrating over the neutrino rapidity distributions. We reduce the dominant systematic uncertainties from jet energy calibration using a correction obtained from t{bar t} → l + jets events. We also correct jets in simulated events to replicate the quark flavor dependence of the jet response in data. In combination with our previous analysis, we measure m{sub t} = 174.0 ± 2.4(stat) ± 1.4(syst) GeV.