Finite-width effects on threshold corrections to squark and gluino production
arXiv:1211.3408 · doi:10.1007/JHEP01(2013)085
Abstract
We study the implication of finite squark and gluino decay widths for threshold resummation of squark and gluino production cross sections at the LHC. We find that for a moderate decay width (Gamma/m < 5%) higher-order soft and Coulomb corrections are appropriately described by NLL calculations in the zero-width limit including the contribution from bound-state resonances below threshold, with the remaining uncertainties due to finite-width effects of a similar order as the ambiguities of threshold-resummed higher-order calculations.
30 pages, 13 figures. v2: minor typos corrected and clarifications added