Signal-background interference effects for gg→H→W ~+W~- beyond leading order

Bonvini M.; Caola F.; Forte S.Melnikov K.Ridolfi G.

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Signal-background interference effects for gg→H→W ~+W~- beyond leading order

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We study the effect of QCD corrections to the gg→H→W ~+W~- signal-background interference at the LHC for a heavy Higgs boson. We construct a soft-collinear approximation to the next-to-leading order (NLO) and next-to-next-to-leading order (NNLO) corrections for the background process, which is exactly known only at leading order (LO). We estimate its accuracy by constructing and comparing the same approximation to the exact result for the signal process, which is known up to NNLO, and we conclude that we can describe the signal-background interference to better than O(10) accuracy. We show that our result implies that, in practice, a fairly good approximation to higher order QCD corrections to the interference may also be obtained by rescaling the known LO result by a K factor computed using the signal process.

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《Physical review, D. Particles, fields, gravitation, and cosmology》 |2013年第3期|034032-1-034032-6|共6页
作者
Bonvini M.; Caola F.; Forte S.Melnikov K.Ridolfi G.;
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作者单位

Deutsches Elektronen-Synchroton, DESY, Notkestra?e 85, D-22603 Hamburg, Germany;

Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, United States;

Dipartimento di Fisica, Università di Milano, INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, ItalyDipartimento di Fisica, Università di Genova, INFN, Sezione di Genova, Via Dodecaneso 33, I-16146 Genova, Italy;

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正文语种英语
中图分类 53.833;
关键词
Signal-background; interference effects; gg→H→W ~+W~-;

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Signal-background interference effects for gg→H→W ~+W~- beyond leading order

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