Higgs production in association with off-shell top-antitop pairs at NLO EW and QCD at the LHC - INSPIRE

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Higgs production in association with off-shell top-antitop pairs at NLO EW and QCD at the LHC

Ansgar Denner
(
- Wurzburg U.
)
,
Jean-Nicolas Lang
(
- Wurzburg U.
)
,
Mathieu Pellen
(
- Wurzburg U.
)
,
Sandro Uccirati
(
- INFN, Turin and
- Turin U.
)

Dec 21, 2016

28 pages

Published in:

JHEP 02 (2017) 053

Published: Feb 9, 2017

e-Print:

1612.07138 [hep-ph]

DOI:

10.1007/JHEP02(2017)053

View in:

ADS Abstract Service

reference search73 citations

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Abstract: (Springer)

We present NLO electroweak corrections to Higgs production in association with off-shell top-antitop quark pairs. The full process

\mathrm{pp}\to {\mathrm{e}}^{+}{\nu}_{\mathrm{e}}{\mu}^{-}{\overline{\nu}}_{\mu}\mathrm{b}\overline{\mathrm{b}}\mathrm{H}

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.

Note:

28 pages, 40 eps-figures. Matches the published version. arXiv admin note: text overlap with arXiv:1607.05571

NLO Computations
CERN LHC Coll
p p: scattering
Higgs particle: associated production
top: pair production
top: decay
bottom: pair production
lepton: final state
effect: off-shell
electroweak interaction: correction

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