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Two-loop QCD corrections to the helicity amplitudes for H → 3 partons

Gehrmann, T.; Jaquier, M.; Glover, E.W.N.; Koukoutsakis, A.

Authors

T. Gehrmann

M. Jaquier

A. Koukoutsakis



Abstract

Many search strategies for the Standard Model Higgs boson apply specific selection criteria on hadronic jets observed in association with the Higgs boson decay products, either in the form of a jet veto, or by defining event samples according to jet multiplicity. To improve the theoretical description of Higgs-boson-plus-jet production (and the closely related Higgs boson transverse momentum distribution), we derive the two-loop QCD corrections to the helicity amplitudes for the processes H → ggg and H → qq¯¯gqq¯g in an effective theory with infinite top quark mass. The helicity amplitudes are extracted from the coefficients appearing in the general tensorial structure for each process. The coefficients are derived from the Feynman graph amplitudes by means of projectors within the conventional dimensional regularization scheme. The infrared pole structure of our result agrees with the expectation from infrared factorization and the finite parts of the amplitudes are expressed in terms of one- and two-dimensional harmonic polylogarithms.

Citation

Gehrmann, T., Jaquier, M., Glover, E., & Koukoutsakis, A. (2012). Two-loop QCD corrections to the helicity amplitudes for H → 3 partons. Journal of High Energy Physics, 2012(02), https://doi.org/10.1007/jhep02%282012%29056

Journal Article Type Article
Acceptance Date Jan 23, 2012
Publication Date Feb 16, 2012
Deposit Date Jan 30, 2014
Publicly Available Date Mar 2, 2016
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Electronic ISSN 1029-8479
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2012
Issue 02
DOI https://doi.org/10.1007/jhep02%282012%29056
Public URL https://durham-repository.worktribe.com/output/1471981

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