Weak interaction corrections to hadronic top quark pair production
- Institut fuer Theoretische Physik, RWTH Aachen, 52056 Aachen (Germany)
- Department of Physics, Shandong University, Jinan, Shandong 250100 (China)
We determine the weak interaction corrections of order {alpha}{sub s}{sup 2}{alpha} to hadronic top-quark pair production. First we compute the one-loop weak corrections to tt production due to gluon fusion and the order {alpha}{sub s}{sup 2}{alpha} corrections to tt production due to (anti)quark-gluon scattering in the standard model. With our previous result [W. Bernreuther, M. Fuecker, and Z. G. Si, Phys. Lett. B 633, 54 (2006).] this yields the complete corrections of order {alpha}{sub s}{sup 2}{alpha} 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 p{sub T} and M{sub 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 A{sub PV} with respect to the t (t) direction, which is of the order of 1% at the LHC for suitable invariant-mass cuts.
- OSTI ID:
- 20868075
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 11; Other Information: DOI: 10.1103/PhysRevD.74.113005; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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