A model-independent analysis of $$b{\rightarrow }s\mu ^{+}\mu ^{-}$$ b → s μ + μ - transitions with GAMBIT ’s FlavBit
- Resource Type
- article
- Authors
- Jihyun Bhom; Marcin Chrzaszcz; Farvah Mahmoudi; Markus T. Prim; Pat Scott; Martin White
- Source
- European Physical Journal C: Particles and Fields, Vol 81, Iss 12, Pp 1-17 (2021)
- Subject
- Astrophysics
QB460-466
Nuclear and particle physics. Atomic energy. Radioactivity
QC770-798
- Language
- English
- ISSN
- 1434-6044
1434-6052
Abstract The search for flavour-changing neutral current effects in B-meson decays is a powerful probe of physics beyond the Standard Model. Deviations from SM behaviour are often quantified by extracting the preferred values of the Wilson coefficients of an operator product expansion. We use the FlavBit module of the GAMBIT package to perform a simultaneous global fit of the Wilson coefficients $$C_7$$ C 7 , $$C_9$$ C 9 , and $$C_{10}$$ C 10 using a combination of all current data on $$b{\rightarrow }s\mu ^{+}\mu ^{-}$$ b → s μ + μ - transitions. We further extend previous analyses by accounting for the correlated theoretical uncertainties at each point in the Wilson coefficient parameter space, rather than deriving the uncertainties from a Standard Model calculation. We find that the best fit deviates from the SM value with a significance of 6.6 $$\sigma $$ σ . The largest deviation is associated with a vector coupling of muons to b and s quarks.