Search for the decay $B \rightarrow D^* \eta \pi$ in Belle II

Sumitted to PubDB: 2023-09-04

Category: Proceeding, Visibility: Public

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Authors	Saurabh Sandilya, Karim Trabelsi, Vismaya V S
Date	July 12, 2023
Belle II Number	BELLE2-CONF-PROC-2023-028
Abstract	Recent measurements of semileptonic decays show a difference between the branching ratio of the sum of exclusive decay rates and the inclusive $b \rightarrow c \ell \nu$ decay rate (the so-called Semi-Leptonic (SL) gap) which affects the interpretation of the CKM element $\|Vcb\|$. Large contributions from not-yet measured $B \rightarrow D^* \eta \ell \nu$ decays could explain such difference. We present a study of the $B \rightarrow D^* \eta \pi$ decay on the simulated data sample of the Belle II experiment. This measurement will provide valuable information to predict its semileptonic counterpart $B \rightarrow D^* \eta \ell \nu$. If $B \rightarrow D^* \eta \pi$ decay is found to be large, it could contribute significantly to the hadronic B-tagging, and consequently enhance the sensitivity for searching rare B decays with missing energy.