Measurement Of The Top Antitop Production Cross Section In Pp Collisions At Sqrt S
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Measurement Of The Top Antitop Production Cross Section In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2011
Measurement Of The Top Antitop Production Cross Section 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 2011 with categories.
A measurement of the top-antitop production cross section in proton-proton collisions at a centre-of-mass energy of 7 TeV has been performed at the LHC with the CMS detector. The analysis uses a data sample corresponding to an integrated luminosity of 36 inverse picobarns and is based on the reconstruction of the final state with one isolated, high transverse-momentum electron or muon and three or more hadronic jets. The kinematic properties of the events are used to separate the top-antitop signal from W+jets and QCD multijet background events. The measured cross section is 173 + 39 - 32 (stat. + syst.) pb, consistent with standard model expectations.
Qcd Radiation In Top Antitop And Z Jets Final States
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Author : Kiran Joshi
language : en
Publisher: Springer
Release Date : 2015-06-12
Qcd Radiation In Top Antitop And Z Jets Final States written by Kiran Joshi and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-12 with Science categories.
This thesis contains new research in both experimental and theoretical particle physics, making important contributions in each. Two analyses of collision data from the ATLAS experiment at the LHC are presented, as well as two phenomenological studies of heavy coloured resonances that could be produced at the LHC. The first data analysis was the measurement of top quark-antiquark production with a veto on additional jet activity. As the first detector-corrected measurement of jet activity in top-antitop events it played an important role in constraining the theoretical modelling, and ultimately reduced these uncertainties for ATLAS's other top-quark measurements by a factor of two. The second data analysis was the measurement of Z+2jet production and the observation of the electroweak vector boson fusion (VBF) component. As the first observation of VBF at a hadron collider, this measurement demonstrated new techniques to reliably extract VBF processes and paved the way for future VBF Higgs measurements. The first phenomenological study developed a new technique for identifying the colour of heavy resonances produced in proton-proton collisions. As a by-product of this study an unexpected and previously unnoticed correlation was discovered between the probability of correctly identifying a high-energy top and the colour structure of the event it was produced in. The second phenomenological study explored this relationship in more detail, and could have important consequences for the identification of new particles that decay to top quarks.
Measurement Of Tt Production Cross Section In Pp Collisions At Square Root S
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Author : Harpreet Singh
language : en
Publisher:
Release Date : 1999
Measurement Of Tt Production Cross Section In Pp Collisions At Square Root S written by Harpreet Singh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Collisions (Nuclear physics) categories.
Search For Flavor Changing Neutral Current Top Quark Decays T Hq With H Bb In Pp Collisions At S 8 Tev With The Atlas Detector
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Author : Shota Tsiskaridze
language : en
Publisher: Springer
Release Date : 2017-08-02
Search For Flavor Changing Neutral Current Top Quark Decays T Hq With H Bb In Pp Collisions At S 8 Tev With The Atlas Detector written by Shota Tsiskaridze and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-02 with Science categories.
This PhD thesis focuses on the search for flavor-changing neutral currents in the decay of a top quark to an up-type quark (q = u, c) and the Standard Model Higgs boson, where the Higgs boson decays to bb. Further, the thesis presents the combination of this search for top quark pair events with other ATLAS searches – in the course of which the most restrictive bounds to date on tqH interactions were obtained. Following on from the discovery of the Higgs boson, it is particularly important to measure the Yukawa couplings of the Standard Model fermions; these parameters may provide crucial insights to help solve the flavor puzzle and may help reveal the presence of new physics before it is directly observed in experiments.
Measurement Of The Tt Production Cross Section In Pp Collisions At Square Root S
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Author : Heather L. Ray
language : en
Publisher:
Release Date : 2004
Measurement Of The Tt Production Cross Section In Pp Collisions At Square Root S written by Heather L. Ray and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Measurements Of The Tt U02c9 Production Cross Section At Square Root Symbol S
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Author : Joseph Francis Kozminski
language : en
Publisher:
Release Date : 2005
Measurements Of The Tt U02c9 Production Cross Section At Square Root Symbol S written by Joseph Francis Kozminski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Cross sections (Nuclear physics) categories.
Measurement Of Sigma X Br W Approaches Tau Upsilon Jets Via Precision Tracking In P P Collisions At Square Root Of S
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Author : Robert Andrew Dunn
language : en
Publisher:
Release Date : 1995
Measurement Of Sigma X Br W Approaches Tau Upsilon Jets Via Precision Tracking In P P Collisions At Square Root Of S written by Robert Andrew Dunn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Symmetry In Particle Physics
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Author : Michal Hnatič
language : en
Publisher: MDPI
Release Date : 2021-06-24
Symmetry In Particle Physics written by Michal Hnatič and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-06-24 with Mathematics categories.
Particle physics is a science about the symmetries of our world. The Standard Model is the fundamental theory of microworld. Particle dynamics in the Standard Model obeys strict symmetry laws with explicit experimental consequences. Priority problems of particle physics based on the Standard Model are more accurate theoretical predictions, experimental measurements and data analysis, proof of existence or non-existence of supersymmetry, top quark properties, Higgs boson, exotic quark states, and physics of neutrinos. In this collection of articles, many of these problems are discussed. We recommend this book for students, graduate students, and scientists working in the field of high energy physics.
A Measurement Of The Production Cross Section Of Tt Pairs In Proton Antiproton Collisions At Square Root S
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Author : Henri Bachacou
language : en
Publisher:
Release Date : 2004
A Measurement Of The Production Cross Section Of Tt Pairs In Proton Antiproton Collisions At Square Root S written by Henri Bachacou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Measurement Of The T Bar T Production Cross Section In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 2014
Measurement Of The T Bar T Production Cross Section 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 2014 with categories.
The top-quark pair production cross section is measured in final states with one electron or muon and one hadronically decaying [tau] lepton from the process $t\bar{t}$ to (l[nu]l) ([tau][nu][tau]) $b\bar{b}$, where l = e, [mu]. The data sample corresponds to an integrated luminosity of 19.6 fb-1 collected with the CMS detector in proton-proton collisions at $\sqrt{s}$ =8 TeV. The measured cross section [sigma]$t\bar{t}$ = 257 ± 3 (stat) ± 24 (syst) ± 7 (lumi) pb, assuming a top-quark mass of 172.5 GeV, is consistent with the standard model prediction.