$R(D^{*})$ measurement using the hadronic tag algorithm with $189~\mathrm{fb}^{-1}$ data at the Belle~II experiment

Sumitted to PubDB: 2023-03-22

Category: Talk, Visibility: Public

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Authors	Koji Hara, Toru Iijima, Taichiro Koga, Kazuki Kojima, Kodai Matsuoka, Katsuro Nakamura, Qi-Dong Zhou
Non-Belle II authors	for the Belle II Collaboration
Date	March 22, 2023
Belle II Number	BELLE2-TALK-CONF-2023-024
Abstract	In the semileptonic decay of 𝐵 mesons, the global average of $R(D^{})$ measurement deviates from the Standard Model by more than $3\sigma$. It indicates a violation of the lepton universality. We will measure $R(D^{})$ for the validation of this deviation using the Belle II data. We have developed an analysis method employing the hadronic tag algorithm. In this talk, we report the results of the $R(D^{*})$ measurement using $189~\mathrm{fb}^{-1}$ data collected by the summer of 2021.
Conference	The 2023 Spring Meeting of the Physical Society of Japan