We perform the resummation of soft-gluon emissions for squark and gluino production at next- to-next-to-leading-logarithmic (NNLL) accuracy. We include also the one-loop hard matching coefficients as well as Coulomb corrections to second order, using Mellin-moment methods. We study the characteristics of this resummation in detail for a centre-of-mass (CM) energy of 8 TeV at the LHC, and for squark and gluino masses up to 2.5 TeV. We find significant enhancing effects for all four processes of squark- and gluino-pair production. Scale dependence is generally reduced compared to NLL resummation, except for gluino-pair production where we find a moderate enhancement.
@article{arxiv.1404.3134,
title = {NNLL resummation for squark and gluino production at the LHC},
author = {Wim Beenakker and Christoph Borschensky and Michael Krämer and Anna Kulesza and Eric Laenen and Vincent Theeuwes and Silja Thewes},
journal= {arXiv preprint arXiv:1404.3134},
year = {2015}
}
Comments
23 pages, 6 figures; added one table and modified figure 1