Deutsches Elektronen-Synchrotron DESY
Notkestraße 85
22607 Hamburg

Georg-August-Universität Göttingen
Wilhelmsplatz 4
37073 Göttingen

Project start date: 01.05.2023

The research of the YIG is motivated by two of the major open questions in particle physics. The first question is about the origin of the huge imbalance between matter and anti matter in the universe. The second question concerns a series of measurements that deviate from the prediction for certain decay modes of B-mesons. These phenomena are summarized in the literature under the term "B-anomalies".
The proposed approach consists of measuring small asymmetries between different B-meson decay rates as a function of their decay-time. For the first time, we will apply this analysis method to those rare B-decay modes that already show some deviations from theoretical expectations. This will provide independent confirmation of the B-anomalies in case they are real. In addition, it offers a unique opportunity to study whether these anomalies are related to the imbalance between matter and anti matter. To this end we will use data from the Belle II experiment. In order to maximize physics reach, we will contribute to the improvement of the pixel vertex detector as weil as the reconstruction of decay vertices, which is vital for decay-time dependent measurements. This research will help answer two of the most pressing questions in particle physics today.

Leader of the Helmholtz Young Investigators Group:

Dr. Thibaud Humair
Deutsches Elektronen-Synchrotron DESY
Notkestr. 85
22607 Hamburg

Phone: 040 8998-3971
Email: thibaud.humair@desy.de

Partner university:

Georg-August-Universität Göttingen
Wilhelmsplatz 4
37073 Göttingen

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