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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Workshop on precision LFU tests with tau at Belle II -> Check!

In the past week, the leading analysts of the LFU and Vus studies in tau decays met remotely in an online workshop to discuss the status of the ongoing analyses.
Precision measurements rely on the capability to contain uncertainties within the desired level of precision. In the measurement of Vus, one of the CKM matrix elements, from hadronic tau decays, or in the search for LFU violation in leptonic tau decays, the dominating uncertainties have a systematic origin.
A strategy was defined during the very productive week to limit the main uncertainties. In addition, a couple of guest talks took place. One was related to the possibility of using double ratios to suppress further systematic effects (which would cancel in the ratio). The second one was an overview of the analysis performed at the Babar experiment to search for LFU violation in tau decays, to date still the most precise single determination of LFU parameters. The two guest talks are available on the indico page of the meeting, and a picture of the leading analysts is attached below.
Workshop indico page

 leading analysts

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