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

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

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
• Public URL: https://durham-repository.worktribe.com/output/1390017
• Related Public URLs: https://arxiv.org/abs/1607.06354