Flavoured path Beyond the Standard Model of Particle Physics – FlavBSM

Despite its tremendous success, the shortcomings of the Standard Model (SM) of particle physics are well-known, and it is now commonly accepted in the particle physics community that going beyond the SM is a necessity. Search for physics beyond the SM started in the 1970's, and no new physics signal has been discovered so far.
Recently, experimental results in flavour physics have exhibited a series of deviations from the SM predictions. These deviations in B meson decays, referred to as "flavour anomalies", have been growing with time both in terms of statistical significance and in terms of internal consistency. We may therefore be on the verge of the discovery of New Physics (NP).
The FlavBSM proposal aims at understanding the origin of the discrepancies, and determining the underlying new physics model. This objective can be achieved by following three complementary research axes.
The first axis concerns precise calculations of the exclusive semileptonic B decays, and more specifically the calculation of the nonlocal hadronic effects. This constitutes an important challenge in the field, and a necessary step in order to unambiguously distinguish between SM hadronic effects and NP phenomena.
The second axis concerns the design and study of NP models. For this, we will consider not only effective field theory approaches, but also simplified models, based on which we will finally design and study well-motivated "complete" NP models, extending the validity range of the models far beyond the previous effective descriptions.
The third axis consists in software development to study the phenomenological implications of the flavour data. We aim in particular at an automatic calculation of the flavour observables in any NP model, and we will create new tools and techniques to perform statistical analyses and exploration of the parameter spaces of NP models, using simultaneously the constraints from the different sectors of particle physics. The first steps in this direction have already been successfully taken by the coordinator.
This project proposes therefore a full program to address the question of flavour anomalies in its generality. Understanding the origin of flavour anomalies is extremely important for a deeper understanding of fundamental interactions. The determination of the underlying new physics theory will constitute a major step in particle physics, providing directions towards the discovery of new particles. In addition, the project will provide new techniques, calculations and public computing tools to the community which will remain useful independently of the flavour anomalies.