Search For Anomalous Couplings In The W Tb Vertex From The Measurement Of Double Differential Angular Decay Rates Of Single Top Quarks Produced In The T Channel With The Atlas Detector
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Higgs Properties At The Lhc
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Author : Jason Tsz Shing Yue
language : en
Publisher: Springer
Release Date : 2017-08-29
Higgs Properties At The Lhc written by Jason Tsz Shing Yue and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-29 with Science categories.
This thesis studies the properties of the Higgs particle, discovered at the Large Hadron Collider (LHC) in 2012, in order to elucidate its role in electroweak symmetry breaking and cosmological phase transition in the early universe. It shows that a generic spin-2 Higgs impostor is excluded by the precision measurements of electroweak observables and perturbative unitarity considerations. It obtains LHC constraints on anomalous CP-violating Higgs-Top Yukawa couplings and examines the prospects of their measurement in future experiments. Lastly, it discusses in detail the electroweak phase transition and generation of cosmological matter–antimatter asymmetry in the universe with anomalous Higgs couplings.
Search For Anomalous Couplings In The W Tb Vertex From The Measurement Of Double Differential Angular Decay Rates Of Single Top Quarks Produced In The T Channel With The Atlas Detector
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Author :
language : en
Publisher:
Release Date : 2016
Search For Anomalous Couplings In The W Tb Vertex From The Measurement Of Double Differential Angular Decay Rates Of Single Top Quarks Produced In The T Channel With The Atlas Detector 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 Of Anomalous Wtb Couplins In Single Top Quark Prodution At
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Author :
language : en
Publisher:
Release Date : 2011
Search Of Anomalous Wtb Couplins In Single Top Quark Prodution 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 2011 with categories.
The large mass of the top quark, close to the electroweak symmetry-breaking scale, makes it a good candidate for probing physics beyond the Standard Model, including possible anomalous couplings. D0 has made measurements of single top quark production using 5.4 fb−1 of integrated luminosity. We examine the data to study the Lorentz structure of the Wtb coupling. We find that the data prefer the left-handed vector coupling and set upper limits on the anomalous couplings. In 2009, the electroweak single top quark production was observed by the D0 and CDF collaborations. Electroweak production of top quarks at the Tevatron proceeds mainly via the decay of a time-like virtual W boson accompanied by a bottom quark in the s-channel (tb = t{bar b} + {bar t}b), or via the exchange of a space-like virtual W boson between a light quark and a bottom quark in the t-channel (tqb = tq{bar b} + {bar t}qb, where q refers to the light quark). For a top quark mass of 172.5 GeV, The Standard Model (SM) prediction of single top production rate at next-to-leading order with soft-gluon contributions at next-to-next-to-leading order are 1.04 ± 0.04 pb (s-channel) and 2.26 ± 0.12 pb (t-channel). The large mass of the top quark implies that it has large couplings to the electroweak symmetry breaking sector of the SM and may have non-standard interactions with the weak gauge bosons. Single top quark production provides a unique probe to study the interactions of the top quark with the W boson.
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 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.
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 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.
Measurement Of The Fiducial And Total Single Top Quark T Channel Production Cross Sections With The Atlas Detector At S
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Author : Phillipp Tepel
language : en
Publisher:
Release Date : 2018
Measurement Of The Fiducial And Total Single Top Quark T Channel Production Cross Sections With The Atlas Detector At S written by Phillipp Tepel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Fermions categories.
Search For Wt Channel Single Top Quark Production In 7 Tev Proton Proton Collisions Using The Atlas Detector
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Author : Dominique Tardif
language : en
Publisher:
Release Date : 2011
Search For Wt Channel Single Top Quark Production In 7 Tev Proton Proton Collisions Using The Atlas Detector written by Dominique Tardif 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.
Measurements Of Differential Cross Sections In Top Quark Pair Events With A High Transverse Momentum Top Quark And Limits On Beyond The Standard Model Contributions To Top Quark Pair Production With The Atlas Detector At Square Root S
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Author : [Study Group] ATLAS Collaboration CERN
language : en
Publisher:
Release Date : 2022
Measurements Of Differential Cross Sections In Top Quark Pair Events With A High Transverse Momentum Top Quark And Limits On Beyond The Standard Model Contributions To Top Quark Pair Production With The Atlas Detector 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.