Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-05-22
Physics
High Energy Physics
High Energy Physics - Phenomenology
Contribution to Loops and Legs 2006, 5 pages, 4 figures
Scientific paper
10.1016/j.nuclphysbps.2006.09.05
In R-parity conserving supersymmetric (SUSY) models, sleptons are produced in pairs at hadron colliders through neutral and charged electroweak currents. We demonstrate that the polarization of the initial hadron beams allows for a direct extraction of the slepton mixing angle and thus for a determination of the underlying SUSY-breaking mechanism. We also perform a first precision calculation of the transverse-momentum (q_T) spectrum of the slepton pairs by resumming soft multiple-gluon emission at next-to-leading logarithmic order. The results show a relevant contribution of resummation both in the small and intermediate q_T-regions, which strongly influences the extraction of the missing transverse-momentum signal and the subsequent slepton mass-determination, and little dependence on unphysical scales and non-perturbative contributions.
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