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flav-io / flavio

A Python package for flavour physics phenomenology in the Standard model and beyond
http://flav-io.github.io/
MIT License
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Implement B->pi form factors from 2102.07233 #207

Closed alekssmolkovic closed 1 year ago

alekssmolkovic commented 1 year ago

This PR implements the $B\to \pi$ form factors from https://arxiv.org/abs/2102.07233 (by D. Leljak, B. Melic, D. van Dyk).

The LCSR+LQCD fit data, provided by the authors as an ancillary file on the arxiv, is included in flavio/physics/data/arXiv-2102.07233v2/LCSR-LQCD_mod_BCL_params_K=4.yaml

The file flavio/physics/bdecays/formfactors/b_p/bcl_lmvd.py implements the modified BCL FF parametrization from Eq. (4.1) of the reference, whereas the file flavio/physics/bdecays/formfactors/b_p/bcl_parameters_lmvd.py is responsible for loading the central values of the parameters and the covariance matrix from the ancillary file.

peterstangl commented 1 year ago

Thank you @alekssmolkovic! I think this PR can be merged now.