Two-loop QCD corrections to massless quark-gluon scattering
By C. Anastasiou, E. Glover, Carlo Oleari, M. Tejeda-Yeomans. 2001
140 citations recorded by the source corpus.
Abstract We present the O (α 4 s ) virtual QCD corrections to the scattering process of massless quark q q →gg due to the interference of tree and two-loop amplitudes and to the self-interference of one-loop amplitudes. We work in conventional dimensional regularisation and our results are renormalised in the MS scheme. The structure of the infrared divergences agrees with that predicted by Catani while expressions for the finite remainder are given for the q q →gg and the qg→qg ( g q →g q ) scattering processes in terms of logarithms and polylogarithms that are real in the physical region. These results, together with those previously obtained for quark–quark scattering, are important ingredients in the next-to-next-to-leading order contribution to inclusive jet production at hadron colliders.
View Paper: https://www.semanticscholar.org/paper/cab31c052af9ea112d324df5194f1f3a66f19432
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Citations in the corpus
- Erratum: On the structure of infrared singularities of gauge-theory amplitudes (2009, background): “In addition to the on-shell quark and gluon form factors, these include e+e− → q̄qg [35] as well as all four-point amplitudes of quarks and gluons [36–42].”
- Two-loop fermionic corrections to heavy-quark pair production: the quark-antiquark channel (2008, background): “Both two-loop matrix elements were computed analytically in the small-mass expansion limit s, |t|, |u| ≫ m2 in [21, 22], starting from the previously known massless two-loop matrix elements for qq̄ → qq̄ [23] and gg → qq̄ [24].”