Next-to-leading order QCD corrections to bg→tW− at the CERN Large Hadron Collider

Abstract

The next-to-leading order QCD corrections to the Standard Model process of single top production, bg → tW − , for the CERN Large Hadron Collider with √ s = 14 TeV have been calculated. For renormalization and factorization scales µ = µ 0 (µ 0 = m t + m W ), the NLO hadronic cross section is ∼ 37 pb, while ∼ 25 pb for tree level. The NLO QCD corrections can enhance the cross section by a factor from 1.33 to 1.66 for µ 0 2 < µ < 2µ 0

Single-top hadroproduction in association with aWboson

“…In order to gauge how much of the difference between DS and DR is due to the interference term alone, it is useful to define the quantity: 10) where the label NI stands for non-interference. Clearly 11) which is then a direct estimate of the interference contribution, free of contaminations due to doubly-resonant contributions which are present in eq.…”

Associated production of aZboson and a single heavy-quark jet

“…The b distribution function is needed for the above-mentioned Higgs-production process as well as for inclusive Higgs production, bb → h [20,21,22]. It is also needed for the single-top production processes qb → q ′ t [12,23] and gb → W − t [24,25], and the charged-Higgs production process gb → H − t [26,27,28]. The process gQ → γQ is much more sensitive to the charm distribution function than to that of bottom, due to the greater electric charge of the charm quark [30,31].…”

N$^3$LO calculations for top-quark differential cross sections near partonic threshold

“…[20][21][22][23][24]. We add approximate NNLO (aNNLO) soft-gluon corrections to the exact NLO results [36,37] for our best predictions.…”