Search For Anomalous Wtb Couplings And Flavour Changing Neutral Currents In T Channel Single Top Quark Production In Pp Collisions At Sqrt S

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Search For Anomalous Wtb Couplings And Flavour Changing Neutral Currents In T Channel Single Top Quark Production In Pp Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2016

Search For Anomalous Wtb Couplings And Flavour Changing Neutral Currents In T Channel Single Top Quark Production 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.

Single top quark events produced in the t channel are used to set limits on anomalous Wtb couplings and to search for top quark flavour-changing neutral current (FCNC) interactions. The data taken with the CMS detector at the LHC in proton-proton collisions at sqrt(s) = 7 and 8 TeV correspond to integrated luminosities of 5.0 and 19.7 inverse-femtobarns, respectively. The analysis is performed using events with one muon and two or three jets. A Bayesian neural network technique, used to discriminate between the signal and backgrounds, is found to be consistent with the standard model prediction. The 95% confidence level (CL) exclusion limits on anomalous right-handed vector, and left- and right-handed tensor Wtb couplings are measured to be

Search For Single Top Quark Production In Pp Collisions At Square Root Of Strange Quark

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Author : Sarah Kristina Wolinski
language : en
Publisher:
Release Date : 2002

Search For Single Top Quark Production In Pp Collisions At Square Root Of Strange Quark written by Sarah Kristina Wolinski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

Search For Anomalous Wtb Couplings And Flavour Changing Neutral Currents In T Channel Single Top Quark Production In Pp Collisions At S

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Author :
language : en
Publisher:
Release Date : 2016

Search For Anomalous Wtb Couplings And Flavour Changing Neutral Currents In T Channel Single Top Quark Production In 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 2016 with categories.

Search For Flavor Changing Neutral Currents In Top Quark Decays T To Zq In Pp Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2013

Search For Flavor Changing Neutral Currents In Top Quark Decays T To Zq 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.

Search For Anomalous Wtb Couplings In Single Top Quark Production In Pp Collisions At U221a S

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Author :
language : en
Publisher:
Release Date : 2012

Search For Anomalous Wtb Couplings In Single Top Quark Production 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 2012 with categories.

We present new direct constraints on a general Wtb interaction using data corresponding to an integrated luminosity of 5.4 fb-1 collected by the D0 detector at the Tevatron pp collider. The standard model provides a purely left-handed vector coupling at the Wtb vertex, while the most general, lowest dimension Lagrangian allows right-handed vector and left- or right-handed tensor couplings as well. We obtain precise limits on these anomalous couplings by comparing the data to the expectations from different assumptions on the Wtb coupling.

Search For Same Sign Top Quark Pair Production At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2011

Search For Same Sign Top Quark Pair Production 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.

An inclusive search for same-sign top-quark pair production in pp collisions at sqrt(s) = 7 TeV is performed using a data sample recorded with the CMS detector in 2010, corresponding to an integrated luminosity of 35 inverse picobarns. This analysis is motivated by recent studies of p p-bar to t t-bar reporting mass-dependent forward-backward asymmetries larger than expected from the standard model. These asymmetries could be due to Flavor Changing Neutral Currents (FCNC) in the top sector induced by t-channel exchange of a massive neutral vector boson (Z'). Models with such a Z' also predict enhancement of same-sign top-pair production in pp or p p-bar collisions. Limits are set as a function of the Z' mass and its couplings to u and t quarks. These limits disfavour the FCNC interpretation of the Tevatron results.

Search For Anomalous Wtb Couplings In Single Top Quark Production In P Bar P Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2011

Search For Anomalous Wtb Couplings In Single Top Quark Production 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 2011 with categories.

We present new direct constraints on a general Wtb interaction using data corresponding to an integrated luminosity of 5.4 fb−1 collected by the D0 detector at the Tevatron p{bar p} collider. The standard model provides a purely left-handed vector coupling at the Wtb vertex, while the most general, lowest dimension Lagrangian allows right-handed vector and left- or right-handed tensor couplings as well. We obtain precise limits on these anomalous couplings by comparing the data to the expectations from different assumptions on the Wtb coupling.

A Search For Flavour Changing Neutral Currents In Top Quark Decays In Pp Collision Data Collected With The Atlas Detector At U221a S

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Author :
language : en
Publisher:
Release Date : 2012

A Search For Flavour Changing Neutral Currents In Top Quark Decays In Pp Collision Data Collected With The Atlas Detector 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 2012 with categories.

A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s = 7 TeV during 2011, corresponding to an integrated luminosity of 2.1 fb−1, were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t → Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t → Wb. Only the decays of the Z boson to charged leptons and leptonic W-boson decays were considered as signal. Consequently, the final-state topology is characterised by the presence of three isolated charged leptons, at least two jets and missing transverse momentum from the undetected neutrino. No evidence for an FCNC signal was found. An upper limit on the t → Zq branching ratio of BR(t → Zq)

A Search For Flavour Changing Neutral Currents In Top Quark Decays In Pp Collision Data Collected With The Atlas Detector At S

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Author :
language : en
Publisher:
Release Date : 2014

A Search For Flavour Changing Neutral Currents In Top Quark Decays In Pp Collision Data Collected With The Atlas Detector 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 2014 with categories.

A search for flavour changing neutral current (FCNC) processes in top-quark decays by the ATLAS Collaboration is presented. Data collected from pp collisions at the LHC at a centre-of-mass energy of √s = 7 TeV during 2011, corresponding to an integrated luminosity of 2.1 fb−1, were used. A search was performed for top-quark pair-production events, with one top quark decaying through the t → Zq FCNC (q = u, c) channel, and the other through the Standard Model dominant mode t → Wb. Only the decays of the Z boson to charged leptons and leptonic W-boson decays were considered as signal. Consequently, the final-state topology is characterised by the presence of three isolated charged leptons, at least two jets and missing transverse momentum from the undetected neutrino. No evidence for an FCNC signal was found. An upper limit on the t → Zq branching ratio of BR(t → Zq)

Search For Flavour Changing Neutral Current Interactions Of A Top Quark And A Gluon In Pp Collisions At Square Root S

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Author : [Study Group] ATLAS Collaboration CERN
language : en
Publisher:
Release Date : 2022

Search For Flavour Changing Neutral Current Interactions Of A Top Quark And A Gluon In Pp Collisions At Square Root S written by [Study Group] 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 2022 with categories.