https://doi.org/10.1140/epjc/s10052-019-7330-2
Regular Article - Theoretical Physics
Implications for new physics in 
transitions after recent measurements by Belle and LHCb
National Centre for Nuclear Research, Pasteura 7, 02-093, Warsaw, Poland
* e-mail: kamila.kowalska@ncbj.gov.pl
Received:
16
May
2019
Accepted:
23
September
2019
Published online:
11
October
2019
We present a Bayesian analysis of the implications for new physics in semileptonic 
transitions after including new measurements of 
at LHCb and new determinations of 
and 
at Belle. We perform global fits with 1, 2, 4, and 8 input Wilson coefficients, plus one CKM nuisance parameter to take into account uncertainties that are not factorizable. We infer the 68% and 95.4% credibility regions of the marginalized posterior probability density for all scenarios and perform comparisons of models in pairs by calculating the Bayes factor given a common data set. We then proceed to analyzing a few well-known BSM models that can provide a high energy framework for the EFT analysis. These include the exchange of a heavy 
boson in models with heavy vector-like fermions and a scalar field, and a model with scalar leptoquarks. We provide predictions for the BSM couplings and expected mass values.
© The Author(s), 2019
