QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory

Gauld, R.; Pecjak, B.D.; Scott, D.J.

doi:10.1103/physrevd.94.074045

QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory

Gauld, R.; Pecjak, B.D.; Scott, D.J.

Authors

R. Gauld

Professor Ben Pecjak ben.pecjak@durham.ac.uk
Professor

D.J. Scott

Abstract

We calculate the O(αs) QCD corrections to the inclusive h→bb¯ decay rate in the dimension-6 standard model effective field theory (SMEFT). The QCD corrections multiplying the dimension-6 Wilson coefficients which alter the hbb¯-vertex at tree-level are proportional to the standard model (SM) ones, so next-to-leading order results can be obtained through a simple rescaling of the tree-level decay rate. On the other hand, contributions from the operators QbG and QHG, which alter the gbb¯-vertex and introduce a hgg-vertex respectively, enter at O(αs) and induce sizeable corrections which are unrelated to the SM ones and cannot be anticipated through a renormalization-group analysis. We present compact analytic results for these contributions, which we recommend to be included in future phenomenological studies.

Citation

Gauld, R., Pecjak, B., & Scott, D. (2016). QCD radiative corrections for h→bb¯ in the standard model dimension-6 effective field theory. Physical Review D, 94(7), Article 074045. https://doi.org/10.1103/physrevd.94.074045

Journal Article Type	Article
Acceptance Date	Oct 11, 2016
Online Publication Date	Oct 31, 2016
Publication Date	Oct 31, 2016
Deposit Date	Dec 6, 2016
Publicly Available Date	Dec 7, 2016
Journal	Physical Review D
Print ISSN	2470-0010
Electronic ISSN	2470-0029
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	94
Issue	7
Article Number	074045
DOI	https://doi.org/10.1103/physrevd.94.074045
Related Public URLs	https://arxiv.org/abs/1607.06354

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