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Through top-quark pair productions at LHC, we study possible effects of nonstandard top-gluon couplings yielded by SU(3)xSU(2)xU(1) invariant dimension-6 effective operators. We calculate the total cross section and also some distributions…

高能物理 - 唯象学 · 物理学 2010-02-17 Zenro Hioki , Kazumasa Ohkuma

We compute, for $t \bar t$ production at the LHC and at the Tevatron, several charge asymmetries to NLO QCD, including also the electromagnetic and weak-interaction corrections. We calculate these asymmetries both inclusively and with…

高能物理 - 唯象学 · 物理学 2013-05-30 Werner Bernreuther , Zong-Guo Si

We present a measurement of the top quark pair ($t\bar{t}$) production cross section ($\sigma_{t\bar{t}}$) in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV using 230 pb$^{-1}$ of data collected by the D0 experiment at the Fermilab Tevatron…

高能物理 - 实验 · 物理学 2009-11-11 D0 Collaboration , V. Abazov

Preliminary results obtained by the CDF and D0 Collaborations on the top quark pair production cross-section in p pbar collisions at a center-of-mass energy of 1.96 TeV are presented. The measurements are obtained using various final states…

高能物理 - 实验 · 物理学 2007-05-23 Ia Iashvili

We present a detailed study of the anomalous top quark production with subsequent decay at the LHC induced by model-independent flavor-changing neutral-current couplings, incorporating the complete next-to-leading order QCD effects. Our…

高能物理 - 唯象学 · 物理学 2011-10-25 Jun Gao , Chong Sheng Li , Li Lin Yang , Hao Zhang

We calculate flavor-changing neutral-current (FCNC) processes involving top-quark production via anomalous tqV couplings at the Tevatron and HERA colliders. We cover the FCNC processes p pbar -> t Z, p pbar -> t gamma, p pbar -> t t, and e…

高能物理 - 唯象学 · 物理学 2009-11-10 Nikolaos Kidonakis , Alexander Belyaev

We present the complete calculations of the forward-backward asymmetry ($A_{\rm FB}$) and the total cross section of top quark pair production induced by dimension-six four quark operators at the Tevatron up to…

高能物理 - 唯象学 · 物理学 2015-05-28 Ding Yu Shao , Chong Sheng Li , Jian Wang , Jun Gao , Hao Zhang , Hua Xing Zhu

We present updated predictions for the total cross section for Higgs boson production by gluon--gluon fusion in hadron collisions. Our calculation includes the most advanced theoretical information available at present for this observable:…

高能物理 - 唯象学 · 物理学 2009-11-19 D. de Florian , M. Grazzini

This paper investigates a signature of Lorentz invariance violation with the $t\bar{t}$ production at the LHC and future hadron colliders. Possible deviations from the Lorentz symmetry remain poorly constrained in the top quark sector. With…

高能物理 - 唯象学 · 物理学 2020-03-18 Aurelien Carle , Nicolas Chanon , Stephane Perries

We present a calculation of the full next-to-leading order QCD corrections to the scattering process pp \to t tbar Z. This channel will be used to measure the t tbar Z electroweak couplings at the Large Hadron Collider. These couplings…

高能物理 - 唯象学 · 物理学 2008-11-26 Achilleas Lazopoulos , Thomas McElmurry , Kirill Melnikov , Frank Petriello

We discuss the heavy quark production cross section near partonic threshold in hadronic collisions, including the resummation of leading and next-to-leading logarithms arising from soft gluon emission. We show how to handle the…

高能物理 - 唯象学 · 物理学 2009-10-31 Nikolaos Kidonakis , Ramona Vogt

We have computed the cross section for $t\bar t$ production by gluon-gluon fusion at next-to-leading order (NLO) in the QCD coupling, keeping the full dependence on the $t\bar t$ spins. Furthermore we have determined to the same order the…

高能物理 - 唯象学 · 物理学 2009-11-07 W. Bernreuther , A. Brandenburg , Z. G. Si , P. Uwer

I present approximate next-to-next-to-leading-order (NNLO) top-quark transverse momentum, pT, distributions in t-channel single-top production. These distributions are derived from next-to-next-to-leading-logarithm (NNLL) soft-gluon…

高能物理 - 唯象学 · 物理学 2015-06-16 Nikolaos Kidonakis

We present a complete analysis of threshold resummation effects on direct light and heavy gaugino pair production at the Tevatron and the LHC. Based on a new perturbative calculation at next-to-leading order of SUSY-QCD, which includes also…

高能物理 - 唯象学 · 物理学 2014-11-21 J. Debove , B. Fuks , M. Klasen

The cross section for pair production of top quarks (t-tbar) with high transverse momenta is measured in pp collisions, collected with the CMS detector at the LHC with sqrt(s) = 8 TeV in data corresponding to an integrated luminosity of…

高能物理 - 实验 · 物理学 2016-10-19 CMS Collaboration

To date, the appearance and resummation of "super-leading" logarithms in hadron-hadron collisions has been studied only for massless parton states. We extend the formalism to include an arbitrary number of massive final states. We derive…

高能物理 - 唯象学 · 物理学 2025-10-30 Upalaparna Banerjee , Romy Grünhofer , Matthias König , Yibei Li , Matthias Neubert , Josua Scholze

We present a new determination of the top-quark mass $m_t$ based on the experimental data from the Tevatron and the LHC for single-top hadro-production. We use the inclusive cross sections of $s$- and $t$-channel top-quark production to…

高能物理 - 唯象学 · 物理学 2016-12-21 S. Alekhin , S. Moch , S. Thier

We search for evidence of resonant top quark pair production in 955 pb-1 of p-pbar collisions at sqrt(s)=1.96 TeV recorded with the CDF II detector at the Fermilab Tevatron. For fully reconstructed candidate t-tbar events triggered on…

高能物理 - 实验 · 物理学 2010-05-12 CDF Collaboration , T. Aaltonen

The production of a top-antitop quark pair in association with a $W$ boson ($t\bar tW$) is one of the heaviest signatures currently probed at the Large Hadron Collider (LHC). Since the first observation reported in 2015 the corresponding…

The top quark pair production $\sigma_{t\bar{t}}$ is measured in pp collisions at a center-of-mass energy of 5.02 TeV. The analyzed data have been collected by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of…

高能物理 - 实验 · 物理学 2018-01-11 Juan R. González Fernández