منابع مشابه
Single-top-quark production at hadron colliders
Single-top-quark production probes the charged-current weak interaction of the top quark, and provides a direct measurement of the CKM matrix element Vtb. We perform two independent analyses to quantify the accuracy with which the W -gluon fusion (gq → tb̄q) and qq̄ → tb̄ signals can be extracted from the backgrounds at both the Tevatron and the LHC. Although perturbation theory breaks down at low...
متن کاملSpin Correlation in Top-Quark Production at Hadron Colliders
We propose techniques to observe the correlation of the spins of top quarks and antiquarks at the Tevatron and the LHC. Observation of the spin correlation would confirm that the top quark decays before its spin flips, and would place a lower bound on the top-quark width and Vtb. The spin correlation may also be a useful tool to study the weak decay amplitude of the top quark.
متن کاملSingle Top Quark Production via FCNC Couplings at Hadron Colliders
We calculate single top–quark production at hadron colliders via the chromo–magnetic flavor–changing neutral current couplings t̄cg and t̄ug. We find that the strength for the anomalous t̄cg (t̄ug) coupling may be probed to κc/Λ = 0.092 TeV −1 (κu/Λ = 0.026 TeV ) at the Tevatron with 2 fb of data and κc/Λ = 0.013 TeV −1 (κu/Λ = 0.0061 TeV) at the LHC with 10 fb of data. The two couplings may be dis...
متن کاملTop Quark Production at Hadron Colliders: an Overview
The study of the properties of the top quark is one of the main goals of the Large Hadron Collider (LHC) physics program. The experimental precision expected at the LHC requires the calculation of several top-quark related observables beyond leading order in the strong coupling constant. In this work we briefly review the status of the theoretical predictions for the top-quark production proces...
متن کاملTop quark pair production and decay at hadron colliders
In ongoing and upcoming hadron collider experiments, top quark physics will play an important rôle in testing the Standard Model and its possible extensions. In this work we present analytic results for the differential cross sections of top quark pair production in hadronic collisions at next-to-leading order in the QCD coupling, keeping the full dependence on the spins of the top quarks. Thes...
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ژورنال
عنوان ژورنال: Pramana
سال: 2012
ISSN: 0304-4289,0973-7111
DOI: 10.1007/s12043-012-0368-4