Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-03-27
Phys.Lett.B651:160-165,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 3 figures
Scientific paper
10.1016/j.physletb.2007.06.028
To match the precision of present and future measurements of W-boson production at hadron colliders, electroweak radiative corrections must be included in the theory predictions. In this paper we consider their effect on the transverse momentum (p_T) distribution of W bosons, with emphasis on large p_T. We evaluate the full electroweak O(\alpha) corrections to the process pp -> Wj including virtual and real photonic contributions. We also provide compact approximate expressions which are valid in the high-energy region, where the electroweak corrections are strongly enhanced by logarithms of \hat{s}/M_W^2. These expressions include quadratic and single logarithms at one loop as well as quartic and triple logarithms at two loops. Numerical results are presented for proton-proton collisions at 14 TeV. The corrections are negative and their size increases with p_T. At the LHC, where transverse momenta of 2 TeV or more can be reached, the one- and two-loop corrections amount up to -40% and +10%, respectively.
Kuhn Johann H.
Kulesza Alex
Pozzorini Stefano
Schulze Markus
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