NLL soft and Coulomb resummation for squark and gluino production at the LHC

A bstract We present predictions of the total cross sections for pair production of squarks and gluinos at the LHC, including the stop-antistop production process. Our calculation supplements full fixed-order NLO predictions with resummation of threshold logarithms and Coulomb singularities at next-...

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Bibliographic Details
Published in:The journal of high energy physics 2012-06, Vol.2012 (6), Article 52
Main Authors: Falgari, P., Schwinn, C., Wever, C.
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Elementary Particles
Gluons
High energy physics
Logarithms
Pair production
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
Scattering cross sections
String Theory
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Summary:A bstract We present predictions of the total cross sections for pair production of squarks and gluinos at the LHC, including the stop-antistop production process. Our calculation supplements full fixed-order NLO predictions with resummation of threshold logarithms and Coulomb singularities at next-to-leading logarithmic (NLL) accuracy, including bound-state effects. The numerical effect of higher-order Coulomb terms can be as big or larger than that of soft-gluon corrections. For a selection of benchmark points accessible with data from the 2010-2012 LHC runs, resummation leads to an enhancement of the total inclusive squark and gluino production cross section in the 15-30% range. For individual production processes of gluinos, the corrections can be much larger. The theoretical uncertainty in the prediction of the hard-scattering cross sections is typically reduced to the ±10% level.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP06(2012)052