Jonathan M. Cullen
NLO corrections to h → bb¯ decay in SMEFT
Cullen, Jonathan M.; Pecjak, Benjamin D.; Scott, Darren J.
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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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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