Abstract
We determine the weak interaction corrections of order to hadronic top-quark pair production. First we compute the one-loop weak corrections to production due to gluon fusion and the order corrections to production due to (anti)quark-gluon scattering in the standard model. With our previous result [W. Bernreuther, M. Fücker, and Z. G. Si, Phys. Lett. B 633, 54 (2006).] this yields the complete corrections of order to , , , and induced hadronic production with and 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 invariant-mass distributions. At the LHC these corrections can be of the order of 10% compared with the leading-order results, for large and , respectively. Apart from parity-even spin correlations we analyze also parity-violating double- and single-spin asymmetries and show how they are related if invariance holds. For (and ) quarks which decay semileptonically, we compute a resulting charged-lepton forward-backward asymmetry with respect to the () direction, which is of the order of 1% at the LHC for suitable invariant-mass cuts.
20 More- Received 26 October 2006
DOI:https://doi.org/10.1103/PhysRevD.74.113005
©2006 American Physical Society