Search for the Decay BDηπB \rightarrow {D^{*}} \eta \pi in Belle II

Jul 17, 2024
3 pages
Published in:
  • Springer Proc.Phys. 304 (2024) 1236-1238
  • Published: Jul 17, 2024
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Abstract: (Springer)
Recent measurements of semileptonic decays show a difference between the branching ratio of the sum of exclusive decay rates and the inclusive bcνb \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 BDηνB \rightarrow D^* \eta \ell \nu decays could explain such difference. We present a study of the BDηπB \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 BDηνB \rightarrow D^* \eta \ell \nu . If BDηπB \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.