Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-01-24
Nucl.Phys.B777:157-181,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages, 11 figures. Wording of several paragraphs improved, some typos corrected, version accepted by Nucl. Phys. B
Scientific paper
10.1016/j.nuclphysb.2007.03.052
We present a first and extensive study of threshold resummation effects for supersymmetric (SUSY) particle production at hadron colliders, focusing on Drell-Yan like slepton-pair and slepton-sneutrino associated production. After confirming the known next-to-leading order (NLO) QCD corrections and generalizing the NLO SUSY-QCD corrections to the case of mixing squarks in the virtual loop contributions, we employ the usual Mellin N-space resummation formalism with the minimal prescription for the inverse Mellin-transform and improve it by resumming 1/N-suppressed and a class of N-independent universal contributions. Numerically, our results increase the theoretical cross sections by 5 to 15% with respect to the NLO predictions and stabilize them by reducing the scale dependence from up to 20% at NLO to less than 10% with threshold resummation.
Bozzi Giuseppe
Fuks Benjamin
Klasen Michael
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