$R(D^{*})$ measurement using the hadronic tag algorithm at the Belle II experiment

Sumitted to PubDB: 2022-09-17

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	Sept. 6, 2022
Belle II Number	BELLE2-TALK-CONF-2022-111
Abstract	In the semileptonic decay of $B$ mesons, the global average of $R(D^{})$ measurement deviates from the Standard Model by $3.3\sigma$. It indicates a violation of the lepton universality. We will measure $R(D^{})$ for the validation of this deviation using the Belle II data, which are independent of the previous measurements’ data. We have developed an analysis method employing the hadronic tag algorithm. In this talk, we will report the method and discuss the expected sensitivity in this analysis with data collected by the summer of 2022.
Conference	The 2022 Autumn Meeting of the Physical Society of Japan