期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP02(2017)053
关键词
NLO Computations
资金
- Bundesministerium fur Bildung und Forschung (BMBF) [05H15WWCA1]
- European Commission through the HiggsTools Initial Training Network [PITN-GA-2012-316704]
We present NLO electroweak corrections to Higgs production in association with off-shell top-antitop quark pairs. The full process pp -> e(+) upsilon(e)mu(-)(upsilon) over bar (mu)b (b) over barH is considered, and hence all interference, off-shell, and non-resonant contributions are taken into account. The electroweak corrections turn out to be below one per cent for the integrated cross section but can exceed 10% in certain phase-space regions. In addition to its phenomenological relevance, the computation constitutes a major technical achievement as the full NLO virtual corrections involving up to 9-point functions have been computed exactly. The results of the full computation are supported by two calculations in the double-pole approximation. These also allow to infer the effect of off-shell contributions and emphasise their importance especially for the run II of the LHC. Finally, we present combined predictions featuring both NLO electroweak and QCD corrections in a common set-up that will help the experimental collaborations in their quest of precisely measuring the aforementioned process.
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