Searches For Flavor Changing Neutral Currents And Single Top Quarks At PDF Download
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Total Pages | : 9 |
Release | : 2008 |
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Download Searches for Flavor-changing Neutral Currents and Single Top Quarks at Book in PDF, ePub and Kindle
I present brief descriptions of two top quark analyses performed using D0 data from p{bar p} collisions at (square root)s = 1.96 TeV: the search for flavor-changing neutral-current couplings (FCNC) of the top quark with a charm or an up quark with the exchange of a gluon, and the search for the standard model production of single top quarks. The search for FCNC couplings of a gluon to the top quark is the first such analysis at hadron colliders. I describe the application of the Bayesian approach for comparing our physics models to the observed data in both analyses and, in one of them, to separate small signals from large backgrounds.
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Release | : 2010 |
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Download Search for Flavor Changing Neutral Currents in Single Top Quark Production Using 2.3 Fb$^-1$ of $p\bar{p}$ Collisions Book in PDF, ePub and Kindle
We present a search for flavor changing neutral currents via quark-gluon couplings in a sample of single top quark final states corresponding to 2.3 fb−1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron Collider. We select events containing a single top quark candidates with an additional jet, and obtain separation between signal and background using Bayesian neural networks. We find consistency between background expectation and observed data, and set limits on avor changing neutral current gluon couplings of the top quark to up quarks (tgu) and charm quarks (tgc). The cross section limits at the 95% C.L. are [sigma]{sub tgu}
Author | : Shota Tsiskaridze |
Publisher | : Springer |
Total Pages | : 248 |
Release | : 2017-08-02 |
Genre | : Science |
ISBN | : 3319634143 |
Download Search for Flavor-Changing Neutral Current Top Quark Decays t → Hq, with H → bb̅ , in pp Collisions at √s = 8 TeV with the ATLAS Detector Book in PDF, ePub and Kindle
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.
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Release | : 2012 |
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Download Search for Flavor Changing Neutral Currents in Top Quark Decays Using a Two-leptons+track Selection Book in PDF, ePub and Kindle
Author | : Harish Potti |
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Total Pages | : 300 |
Release | : 2020 |
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Download Seeing a Single Top Quark Book in PDF, ePub and Kindle
The top quark is the heaviest known elementary particle. With a coupling to the Higgs boson close to unity, the top quark plays a special role in electroweak symmetry breaking as well as in physics beyond the Standard Model. An accurate measurement of its properties can provide key information for understanding the physics at the TeV scale. In this dissertation, two measurements of the top quark properties are presented. The first part of this dissertation presents the first-ever ATLAS search for the associated production of a single top quark and a photon. This analysis is performed with 139 fb−1 of pp collision data collected by the ATLAS detector at the LHC at [square root symbol] s = 13 TeV. Only final states with exactly one lepton and at least one photon are considered in this analysis. In the second part, results from the combination of ATLAS searches for flavor changing neutral currents (FCNC) in t->Hq decays are presented. Four FCNC analyses, probing different Higgs decay modes, performed with 36.1 fb−1 of proton-proton collision data collected by the ATLAS detector in 2015-2016 are considered in the combination. They search for top-quark pair events in which one top quark decays into Wb and the other top quark decay into Hq
Author | : [Study Group] ATLAS Collaboration CERN |
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Total Pages | : 0 |
Release | : 2022 |
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Download Erratum To: Search for Single Top-quark Production Via Flavour-changing Neutral Currents at 8 TeV with the ATLAS Detector Book in PDF, ePub and Kindle
Author | : John James Kennedy |
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Total Pages | : 0 |
Release | : 2002 |
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Download A Search for Single Top-quark Production and Flavour-changing Neutral-current Interactions at H1 Book in PDF, ePub and Kindle
Author | : Conrad Friedrich |
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Release | : 2014 |
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Download Search for Single Top-quark Production Via Flavour-changing Neutral Currents in Strong Interactions Using [Wurzel]s Book in PDF, ePub and Kindle
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Total Pages | : 7 |
Release | : 2008 |
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Download Search for Production of Single Top Quarks Via $tcg$ and $tug$ Flavor-changing Neutral Current Couplings Book in PDF, ePub and Kindle
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Release | : 2007 |
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Download Search for Anomalous Single Top Quark Production Via Flavour-Changing Neutral Currents with the ATLAS Detector at the Large Hadron Collider Book in PDF, ePub and Kindle