Joint resummation for slepton pair production at hadron colliders

Laboratoire de Physique Subatomique et de Cosmologie, Université Joseph Fourier/CNRS-IN2P3, 53 Avenue des Martyrs, F-38026 Grenoble, France
Nuclear Physics B (Impact Factor: 3.95). 05/2008; 794(1):46-60. DOI: 10.1016/j.nuclphysb.2007.10.021

ABSTRACT We present a precision calculation of the transverse-momentum and invariant-mass distributions for supersymmetric particle pair production at hadron colliders, focusing on Drell–Yan like slepton pair and slepton–sneutrino associated production at the CERN Large Hadron Collider. We implement the joint resummation formalism at the next-to-leading logarithmic accuracy with a process-independent Sudakov form factor, thus ensuring a universal description of soft-gluon emission, and consistently match the obtained result with the pure perturbative result at the first order in the strong coupling constant, i.e. at O(αs). We also implement three different recent parameterizations of non-perturbative effects. Numerically, we give predictions for production and compare the resummed cross section with the perturbative result. The dependence on unphysical scales is found to be reduced, and non-perturbative contributions remain small.

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Available from: Giuseppe Bozzi, Sep 01, 2015
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    • "This computation combines soft gluon resummation at the next-to-leading logarithmic accuracy and a fixed order calculation at the next-to-leading order [33]. It should be noted that soft gluon resummation can also be performed when the transverse momentum of the produced slepton pair p T is small [32], as this gives also rise to possibly large logarithmic terms, or simultaneously in both regimes, i.e., when p T is small and M close to threshold [34]. – 7 – [ GeV ] "
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    • ". The SUSY corrections arising at NLO the latter are given by a vertex diagram with a gluino-squarksquark loop plus external-leg corrections. They have been calculated in [14] [21] [29]. We have recomputed these contributions and find agreement with results in the literature. "
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    Journal of High Energy Physics 11/2011; 2012(5). DOI:10.1007/JHEP05(2012)151 · 6.22 Impact Factor
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    • "For such scenarios, we address collider prospects for the SUSY parameter determination, the stopping of slow staus in the detectors, and viability tests of exceptionally small relic stau abundances. Theoretical predictions for slepton-pair production via the Drell–Yan channel are well known since many years and include next-to-leading order (NLO) corrections from QCD and SUSY-QCD [75] [76] [77] and resummation improved results at the next-to-leading logarithmic (NLL) level [78] [79] [80]. The NLO QCD and SUSY-QCD results are available via the software package Prospino 2 [81]. "
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