Transverse-momentum resummation for gaugino-pair production at the LHC

Details Transverse-momentum resummation for gaugino-pair production at the LHC Transverse-momentum resummation for gaugino-pair production at the LHC

2009-08-28

arxiv.org/abs/0908.4149v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 2 figures, presented at the 2009 Europhysics Conference on High Energy Physics, 16-22 July 2009, Krakow, Poland

Scientific paper

We present a first precision analysis of the transverse-momentum spectrum of gaugino pairs produced at the LHC with center-of-mass energies of 10 or 14 TeV. Our calculation is based on a universal resummation formalism at next-to-leading logarithmic accuracy, which is consistently matched to the perturbative prediction at O(alpha_s). Numerical results are given for the ``gold-plated'' associated production of neutralinos and charginos for a typical benchmark point in the constrained Minimal Supersymmetric Standard Model. We show that the matched resummation results differ considerably from the Monte Carlo predictions employed traditionally in experimental analyses. We also investigate in detail the theoretical uncertainties coming from scale and parton-density function variations and non-perturbative effects.

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