Search For Fourth Generation Quarks In The Dilepton Channel At Atlas With Sqrt S
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Search For Fourth Generation Quarks In The Dilepton Channel At Atlas With Sqrt S
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Author : Michael Werth
language : en
Publisher:
Release Date : 2012
Search For Fourth Generation Quarks In The Dilepton Channel At Atlas With Sqrt S written by Michael Werth 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.
A search is presented for heavy-quark pair production (QQ̄) under the decay hypothesis QQ̄ to W+qW-q̄ with q = u,d,c,s,b. The search is performed with 1.04 fb-1 of integrated luminosity from pp collisions at √s = 7 TeV collected by the ATLAS detector at the CERN Large Hadron Collider (LHC). Events are selected with two oppositely-charged leptons (e or mu), large missing transverse momentum and at least two jets. Mass reconstruction of heavy quark candidates is performed by assuming that the W boson decay products are nearly collinear. The data are in agreement with Standard Model expectations; a heavy quark with mass less than 350 GeV is excluded at 95% confidence level.
Search For Fourth Generation Down Type Quarks In The Same Sign Dilepton Channel With Atlas At A Centre Of Mass Energy Sqrt S
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Author : Rocco Mandrysch
language : en
Publisher:
Release Date : 2012
Search For Fourth Generation Down Type Quarks In The Same Sign Dilepton Channel With Atlas At A Centre Of Mass Energy Sqrt S written by Rocco Mandrysch 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.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1994
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Aeronautics categories.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1990
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Power resources categories.
Search For Fourth Generation B Quarks In Same Sign Dilepton Final States With Atlas
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Author : Dennis Patrick Wendland
language : en
Publisher:
Release Date : 2013
Search For Fourth Generation B Quarks In Same Sign Dilepton Final States With Atlas written by Dennis Patrick Wendland 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 Standard Model Production Of Four Top Quarks In Proton Proton Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2017
Search For Standard Model Production Of Four Top 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 2017 with categories.
A search for events containing four top quarks (ttbar-ttbar) is reported from proton-proton collisions recorded by the CMS experiment at sqrt(s) = 13 TeV and corresponding to an integrated luminosity of 2.6 inverse femtobarns The analysis considers the single-lepton (e or mu)+jets and the opposite-sign dilepton (mu+mu-, mu+/- e-/+, or e+e- )+jets channels. It uses boosted decision trees to combine information on the global event and jet properties to distinguish between ttbar-ttbar and ttbar production. The number of events observed after all selection requirements is consistent with expectations from background and standard model signal predictions, and an upper limit is set on the cross section for ttbar-ttbar production in the standard model of 94 fb at 95% confidence level (10.2 times the prediction), with an expected limit of 118 fb. This is combined with the results from the published CMS search in the same-sign dilepton channel, resulting in an improved limit of 69 fb at 95% confidence level (7.4 times the prediction), with an expected limit of 71 fb. These are the strongest constraints on the rate of ttbar-ttbar production to date.
Search For A Heavy Top Like Quark In Pp Collisions At Square Root S
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Author : David J. Cox
language : en
Publisher:
Release Date : 2012
Search For A Heavy Top Like Quark In Pp Collisions At Square Root S written by David J. Cox 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 the results of a search for pair production of a heavy top-like (t') quark decaying to Wq final states using data corresponding to an integrated luminosity of 5.6 fb−1 collected by the CDF II detector in proton-antiproton collisions at [square root s] = 1.96 TeV center of mass energy. A searche for t' --> Wb in events containing a lepton and four or more jets is conducted. By performing a fit to the two-dimensional distribution of total transverse energy versus reconstructed t' quark mass, we set upper limits on the t't̄' pair production cross section and exclude a standard model fourth-generation t' quark decaying to Wb with mass below 358 GeV/c2 at 95% CL.
Search For A Fourth Generation Quark With Q
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Author : K. Abe
language : en
Publisher:
Release Date : 1989
Search For A Fourth Generation Quark With Q written by K. Abe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Search For Resonances Decaying Into Top Quark Pairs Using Fully Hadronic Decays In Pp Collisions With Atlas At Sqrt S
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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 New Physics With Top Quark Pairs In The L Jets Channel At Sqrt S
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Author : Sabrina Groh
language : en
Publisher:
Release Date : 2020
Search For New Physics With Top Quark Pairs In The L Jets Channel At Sqrt S written by Sabrina Groh 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.