A complete calculation of the order αs2 correction to the Drell-Yan K-factor

Exponentiation of the Drell-Yan cross section near partonic threshold in the DIS and MS-bar schemes

“…Exact results are taken from Refs. [28,29], focusing on "soft and virtual" contributions (all other contributions are suppressed by powers of N at large N ). To get numerical results we focus on SU (3) and set n f = 5.…”

“…Specifically, given a g-loop calculation of one of the cross sections we have discussed, one can extract the value of the various functions appearing in the exponent to that order, and then use exponentiation and RG running to estimate the (g + 1)-loop result. Given the existing results at two loops [28,29], one could construct an estimate of the three-loop partonic cross section. Before embarking in such a calculation, it is however advisable to test the case g = 1, i.e.…”

“…[13,14] through matching to the two-loop cross sections of Ref. [28,29], by using only information from purely virtual contributions.…”

NLO corrections to lepton pair production beyond the Standard Model at hadron colliders

“…Even for as simple a process as Drell-Yan, the leading order (LO) results seriously underestimate the cross sections. This has led to the incorporation of the next-to-leading order (NLO) or next-to-leading log (NLL) [24,25] results in Monte Carlos codes [24] or event generators such as JETRAD [23]. However, no calculations exist for the higher order QCD corrections to cross sections mediated by a generic contact interaction.…”

Search for Heavy Resonances in the Dimuon Channel with the DØ Detector

“…Here, σ (NN)LO ((N)LO pdf) is the (next to-next to) leading order Drell-Yan cross section [77] computed with a parton density function measured relative to a leading order (CTEQ6L1) or next to leading cross section (CTEQ6.1M). A linear interpolation is used to obtain a K-factor with errors for continuous values of the Drell-Yan mass.…”