Higgs decay to fermion pairs at NLO in SMEFT

Cullen, Jonathan M.; Pecjak, Benjamin D.

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