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The feeble interaction frontier of flavour physics

Project description

Feebly interacting particles may be anything but feeble

The Standard Model of particle physics is our best model of the relatively few particles that make up everything in our universe and the forces that act on them. Although it is the best we have and explains almost everything, its acknowledged shortcomings are fundamental. The search for new physics beyond the Standard Model has largely focused on weakly interacting massive particles, or WIMPs. However, light but feebly interacting particles, or FIPs, are often a better fit to models and data. With the support of the Marie Skłodowska-Curie Actions programme, the FlavourFIPs project is developing theoretical tools to simulate the scenarios in which FIPs could extend the Standard Model to inform future experiments.

Objective

Despite all its successes, the shortcomings of the Standard Model of particle physics are well-known: for instance the origin of its flavour structure, the absence of a dark matter candidate, or the strong CP problem. While many of the new physics models aiming at solving them rely on new particles around the TeV scale, this is neither a requirement nor the simplest solution in many cases. In fact, new light but Feebly Interacting Particles (FIPs) often represent the most straightforward solution, with deep implications for flavour physics, dark matter, astrophysics and cosmology. As particle physics enters a new era of “precision”, dozens of experiments, ranging from the High Luminosity LHC to neutrinos experiments, will have the potential to search for such particles.
FlavourFIPs aims at exploring the uncharted links between such versatile new physics candidates and the Standard Model flavour problem.

The applicant will develop novel cutting-edge theoretical tools to study the GeV-scale phenomenology of FIPs, including in particular a unified effective field theory description of new flavoured light particles at this scale. Postulating the existence of a UV-theory designed to solve the flavour problem, FlavourFIPs will then reshape the FIPs parameter space for current and upcoming intensity frontier experiments. In particular, the project will explore how a long-lived FIP could be produced via flavour-violating processes then detected in neutrinos or dedicated LHC-based detectors. Closing the loop, FlavourFIPs will finally investigate if FIPs can participate in creating the flavour anomalies potentially observed in B-mesons decays, and beyond, investigate FIPs role in complete theories of flavour.

Throughout the fellowship, the dissemination activities will reinforce the position of Europe in the intensity frontier international community and will participate in shaping the future experimental landscape, in particular for future HL-LHC-based experiments.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)

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Call for proposal

(opens in new window) H2020-MSCA-IF-2020

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Coordinator

CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE CNRS
Net EU contribution
€ 196 707,84
Address
RUE MICHEL ANGE 3
75794 Paris
France
Region
Ile-de-France Ile-de-France Paris
Activity type
Research Organisations
Links
Total cost
€ 196 707,84