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NLO corrections to h → bb¯ decay in SMEFT

Cullen, Jonathan M.; Pecjak, Benjamin D.; Scott, Darren J.

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Authors

Jonathan M. Cullen

Darren J. Scott



Abstract

We calculate the full set of next-to-leading order (NLO) corrections to h → b b¯¯ decay in the dimension-6 Standard Model Effective Field Theory (SMEFT). Our calculation forms the basis for precision studies of this decay mode in effective field theory, providing analytic and numerical results for contributions of the 45 dimension-6 operators appearing at NLO. On the technical side, we discuss several complications in NLO SMEFT computations which have not yet been addressed in the literature. These include subtleties in Higgs-Z mixing, electric charge renormalization, and especially the treatment of tadpoles in SMEFT. In particular, we highlight the role of decoupling relations in eliminating potentially large tadpole corrections to the decay rate in hybrid renormalization schemes which employ the MS¯¯¯¯¯¯¯ scheme for some Standard Model parameters (such as the b-quark mass and electric charge) and the on-shell scheme for others.

Citation

Cullen, J. M., Pecjak, B. D., & Scott, D. J. (2019). NLO corrections to h → bb¯ decay in SMEFT. Journal of High Energy Physics, 2019(8), Article 173. https://doi.org/10.1007/jhep08%282019%29173

Journal Article Type Article
Acceptance Date Aug 5, 2019
Online Publication Date Aug 29, 2019
Publication Date Aug 31, 2019
Deposit Date Sep 18, 2019
Publicly Available Date Sep 18, 2019
Journal Journal of High Energy Physics
Print ISSN 1126-6708
Publisher Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed Peer Reviewed
Volume 2019
Issue 8
Article Number 173
DOI https://doi.org/10.1007/jhep08%282019%29173

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Published Journal Article (720 Kb)
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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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