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Higgs decay to fermion pairs at NLO in SMEFT

Cullen, Jonathan M.; Pecjak, Benjamin D.

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Authors

Jonathan M. Cullen



Abstract

The calculation of next-to-leading order (NLO) perturbative corrections at fixed operator dimension in Standard Model Effective Field Theory (SMEFT) has been a topic of much recent interest. In this paper we obtain the NLO corrections from dimension-6 operators to the Higgs boson decays h→ff¯¯¯, where the fermions f ∈ {μ, τ, c}. This extends previous results for h→bb¯¯ to all phenomenologically relevant Higgs boson decays into fermions, and provides the basis for future precision analyses of these decays within effective field theory. We point out the benefits of studying ratios of decay rates into different fermions in SMEFT, the most surprising of which is enhanced sensitivity to anomalous hγγ and hgg couplings induced by flavor-universal SMEFT operators, especially in scenarios where flavor-dependent Wilson coefficients are constrained by Minimal Flavor Violation.

Citation

Cullen, J. M., & Pecjak, B. D. (2020). Higgs decay to fermion pairs at NLO in SMEFT. Journal of High Energy Physics, 2020(11), Article 79. https://doi.org/10.1007/jhep11%282020%29079

Journal Article Type Article
Acceptance Date Oct 5, 2020
Online Publication Date Nov 17, 2020
Publication Date 2020-11
Deposit Date Nov 26, 2020
Publicly Available Date Nov 26, 2020
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 2020
Issue 11
Article Number 79
DOI https://doi.org/10.1007/jhep11%282020%29079
Public URL https://durham-repository.worktribe.com/output/1256696

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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.






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