Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-08-31
Phys.Rev.D65:033007,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex3 file, 39 pages, 2 tables, 12 figures
Scientific paper
10.1103/PhysRevD.65.033007
We calculate the complete electroweak O(alpha) corrections to pp, pbar p -> l+l- X (l=e, mu) in the Standard Model of electroweak interactions. They comprise weak and photonic virtual one-loop corrections as well as real photon radiation to the parton-level processes q bar q -> gamma,Z -> l+l-. We study in detail the effect of the radiative corrections on the l+l- invariant mass distribution, the cross section in the Z boson resonance region, and on the forward-backward asymmetry, A_FB, at the Fermilab Tevatron and the CERN Large Hadron Collider. The weak corrections are found to increase the Z boson cross section by about 1%, but have little effect on the forward-backward asymmetry in the Z peak region. Threshold effects of the W box diagrams lead to pronounced effects in A_FB at m(l+l-) approx 160 GeV which, however, will be difficult to observe experimentally. At high di-lepton invariant masses, the non-factorizable weak corrections are found to become large.
Baur Uli
Brein Oliver
Hollik Wolfgang
Schappacher Christian
Wackeroth Doreen
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