Pushing the boundaries of knowledge
"A search for new interactions at Belle II using leptons"

This is the official page of the research team "InterLeptons" at the High Energy Physics Institute of the Austrian Academy of Sciences. The team, led by Dr. Gianluca Inguglia, is funded under the grant agreement nr. 947006 of the Starting Grant award offered by the European Research Council (ERC). The research activities of the team will be described and kept up-to-date on these pages.
The aim InterLeptons is to unveil the new physics nature of the so-called flavor anomalies implementing a bottom-up approach based on the studies of data collected at the Belle II experiment, located in the interaction region
of the Super-KEKB collider. The team focuses on final state events containing leptons and a large amount of missing energy. The results of the searches will be interpreted in terms of low mass dark matter, new forces/interactions, and in terms of lepton flavor violating and lepton flavor non-universal couplings.

InterLeptons brings a significant advancement of a new research area in Austria with the potential of revolutionizing particle physics.


InterLeptons News & Co

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Lepton flavour universality, beyond B anomalies

Hints of new physics and in particular of lepton flavour universality have appeared in many experiments, in the quark and in the lepton sector, and are the key point of InterLeptons. Members of the group are now involved in many projects in collaboration with theory colleagues to understand what test could and should be performed, what is missing yet, what news can we expect in the coming years.
We have recently submitted a review for the Annual Review of Nuclear and Particle Science, to appear in the number _72_, titled "Testing Lepton Flavor Universality with Pion, Kaon, Tau, and Beta Decays", with a preprint available on ArXiv:2111.05338. In this review the role of processes involving other particles than B meson is reviewed. The (hopefully, possibly) emerging pattern of new physics from flavour measurements might bring a profound change in the way we understand particles' interactions, and it's important to look at the whole picture.
Where else are we observing or can we expect to observe anomalies?

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