2006/10/31 by W. Bernreuther, Werner Bernreuther, Michael Fuecker +2 · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.74.113005
published as Phys.Rev.D74:113005,2006 · Latex, 27 figures, 4 tables. 1 figure and 3 references added, scale of 4 figures changed, version to appear in Phys. Rev. D
arxiv created 2006/11/30 · openalex publication_date 2006/12/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We determine the weak interaction corrections of order \ensuremathαs2\ensuremathα to hadronic top-quark pair production. First we compute the one-loop weak corrections to tt production due to gluon fusion and the order \ensuremathαs2\ensuremathα corrections to tt production due to (anti)quark-gluon scattering in the standard model. With our previous result [W. Bernreuther, M. F"ucker, and Z. G. Si, Phys. Lett. B 633, 54 (2006).] this yields the complete corrections of order \ensuremathαs2\ensuremathα to gg, qq, qg, and qg induced hadronic tt production with t and t polarizations and spin correlations fully taken into account. For the Tevatron and the LHC we determine the weak contributions to the transverse top momentum and to the tt invariant-mass distributions. At the LHC these corrections can be of the order of 10% compared with the leading-order results, for large pT and M_tt, respectively. Apart from parity-even tt spin correlations we analyze also parity-violating double- and single-spin asymmetries and show how they are related if CP invariance holds. For t (and t) quarks which decay semileptonically, we compute a resulting charged-lepton forward-backward asymmetry APV with respect to the t (t) direction, which is of the order of 1% at the LHC for suitable invariant-mass cuts.