期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 8, 页码 -出版社
SPRINGER
DOI: 10.1088/1126-6708/2009/08/058
关键词
NLO Computations; QCD; Higgs Physics; Hadronic Colliders
资金
- US Department of Energy [DE-AC02-76SF00515]
We compute the one-loop QCD amplitudes for the processes H (q) over barq (Q) over barQ and H (q) over bar qgg, the latter restricted to the case of opposite-helicity gluons. Analytic expressions are presented for the color- and helicity-decomposed amplitudes. The coupling of the Higgs boson to gluons is treated by an effective interaction in the limit of large top quark mass. The Higgs field is split into a complex field phi and its complex conjugate phi(dagger). The split is useful because amplitudes involving phi have different analytic structure from those involving phi(dagger). We compute the cut-containing pieces of the amplitudes using generalized unitarity. The remaining rational parts are obtained by on-shell recursion. Our results for H (q) over barq (Q) over barQ agree with previous semi-numerical computations. We also show how to convert existing semi-numerical results for the production of a scalar Higgs boson into analogous results for a pseudoscalar Higgs boson.
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