The Higgs width in the SMEFT

Ilaria Brivio; Tyler Corbett; Michael Trott

doi:10.1007/JHEP10(2019)056

The Higgs width in the SMEFT

Ilaria Brivio, Tyler Corbett, Michael Trott

Theoretical high energy, astroparticle and gravitational physics

5 Citations (Scopus)

2 Downloads (Pure)

Abstract

We calculate the total and partial inclusive Higgs widths at leading order in the Standard Model Effective Field Theory (SMEFT). We report results incorporating SMEFT corrections for two and four body Higgs decays through vector currents in this limit. The narrow width approximation is avoided and all phase space integrals are directly evaluated. We explain why the narrow width approximation fails more significantly in the SMEFT compared to the SM, despite the narrowness of the observed SU(2) × U(1) bosons in both theories. Our results are presented in a manner that allows various input parameter schemes to be used, and they allow the inclusive branching ratios and decay widths of the Higgs to be numerically determined without a Monte Carlo generation of phase space for each Wilson coefficient value chosen.

Original language	English
Article number	056
Journal	Journal of High Energy Physics
Issue number	10
Number of pages	45
ISSN	1029-8479
DOIs	https://doi.org/10.1007/JHEP10(2019)056
Publication status	Published - 1 Oct 2019

Keywords

Effective Field Theories
Higgs Physics
Precision QED

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10.1007/JHEP10(2019)056Licence: CC BY

Brivio2019_Article_TheHiggsWidthInTheSMEFT

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title = "The Higgs width in the SMEFT",

abstract = "We calculate the total and partial inclusive Higgs widths at leading order in the Standard Model Effective Field Theory (SMEFT). We report results incorporating SMEFT corrections for two and four body Higgs decays through vector currents in this limit. The narrow width approximation is avoided and all phase space integrals are directly evaluated. We explain why the narrow width approximation fails more significantly in the SMEFT compared to the SM, despite the narrowness of the observed SU(2) × U(1) bosons in both theories. Our results are presented in a manner that allows various input parameter schemes to be used, and they allow the inclusive branching ratios and decay widths of the Higgs to be numerically determined without a Monte Carlo generation of phase space for each Wilson coefficient value chosen.",

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AU - Corbett, Tyler

AU - Trott, Michael

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N2 - We calculate the total and partial inclusive Higgs widths at leading order in the Standard Model Effective Field Theory (SMEFT). We report results incorporating SMEFT corrections for two and four body Higgs decays through vector currents in this limit. The narrow width approximation is avoided and all phase space integrals are directly evaluated. We explain why the narrow width approximation fails more significantly in the SMEFT compared to the SM, despite the narrowness of the observed SU(2) × U(1) bosons in both theories. Our results are presented in a manner that allows various input parameter schemes to be used, and they allow the inclusive branching ratios and decay widths of the Higgs to be numerically determined without a Monte Carlo generation of phase space for each Wilson coefficient value chosen.

AB - We calculate the total and partial inclusive Higgs widths at leading order in the Standard Model Effective Field Theory (SMEFT). We report results incorporating SMEFT corrections for two and four body Higgs decays through vector currents in this limit. The narrow width approximation is avoided and all phase space integrals are directly evaluated. We explain why the narrow width approximation fails more significantly in the SMEFT compared to the SM, despite the narrowness of the observed SU(2) × U(1) bosons in both theories. Our results are presented in a manner that allows various input parameter schemes to be used, and they allow the inclusive branching ratios and decay widths of the Higgs to be numerically determined without a Monte Carlo generation of phase space for each Wilson coefficient value chosen.

KW - Effective Field Theories

KW - Higgs Physics

KW - Precision QED

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JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

IS - 10

M1 - 056

ER -

The Higgs width in the SMEFT

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