FlavBit: A GAMBIT module for computing flavour observables and likelihoods

Florian U. Bernlochner , Marcin Chrząszcz , Lars A. Dal , Ben Farmer , Paul Jackson , Anders Kvellestad , Farvah Mahmoudi (1) , Antje Putze (2) , Christopher Rogan , Pat Scott , Nicola Serra , Christoph Weniger , Martin White

1 CRAL - Centre de Recherche Astrophysique de Lyon
2 LAPTH - Laboratoire d'Annecy-le-Vieux de Physique Théorique

Flavour physics observables are excellent probes of new physics up to very high energy scales. Here we present FlavBit, the dedicated flavour physics module of the global-fitting package GAMBIT. FlavBit includes custom implementations of various likelihood routines for a wide range of flavour observables, including detailed uncertainties and correlations associated with LHCb measurements of rare, leptonic and semileptonic decays of B and D mesons, kaons and pions. It provides a generalised interface to external theory codes such as SuperIso, allowing users to calculate flavour observables in and beyond the Standard Model, and then test them in detail against all relevant experimental data. We describe FlavBit and its constituent physics in some detail, then give examples from supersymmetry and effective field theory illustrating how it can be used both as a standalone library for flavour physics, and within GAMBIT.

Mots clés: B: semileptonic decay; D: semileptonic decay; effective field theory; effective Hamiltonian; supersymmetry; LHC-B; statistical analysis; numerical calculations; new physics; programming

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]; Physique des Hautes Energies - Expérience [hep-ex]

Florian U. Bernlochner, Marcin Chrząszcz, Lars A. Dal, Ben Farmer, Paul Jackson, et al.. FlavBit: A GAMBIT module for computing flavour observables and likelihoods. European Physical Journal C: Particles and Fields, 2017, 77 (11), pp.786. ⟨10.1140/epjc/s10052-017-5157-2⟩. ⟨hal-01669757⟩