Verschiedener Meinung

QCD threshold corrections for gluino pair production at hadron colliders

“…For the gluon-fusion channel we obtain in this way the NNLO scaling functions in the threshold approximation as, f (20) −89280 ln(2) − 3456C I ln(2) + 62208 ln 2 (2) − 2400π 2 ln 2 (β) [22] where the approximate NNLO cross section at threshold has been computed for massive colored particle production in an arbitrary SU(3) color representation of the final state. In particular, they also contain subleading NNLO Coulomb terms and the non-relativistic kinetic-energy corrections, which do not follow directly from the resummed cross section (20), but have to be determined from matching to explicit NNLO computations [49][50][51][52]. The latter ones are given by terms proportional to D I (3 − 2D I (1 + v spin )) ln(β) in Eqs.…”