Weak interaction corrections to hadronic top quark pair production

Werner Bernreuther; Michael Fuecker; Zong-Guo Si

Paper

Weak interaction corrections to hadronic top quark pair production

Abstract

In this paper 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 this yields the complete corrections of order

, 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 percent 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 CP 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 one percent at the LHC for suitable invariant-mass cuts.