PoS - Proceedings of Science
Volume 462 - 16th International Conference on Heavy Quarks and Leptons (HQL2023) - Posters
Search for B → D*ηπ Decays with Belle II data
V.s. Vismaya, S. Sandilya, K. Trabelsi and S. Sandilya*
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Pre-published on: April 14, 2024
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We present a search for the yet-unobserved B → D*ηπ decay at Belle II. This search can provide information for the understanding of the so-called semileptonic gap, which is the deficit in the sum of the branching fractions (BF) of known exclusive decays with respect to the measured inclusive 𝑏 → 𝑐ℓ𝜈 branching fraction. Widely used models to fill this deficit assume the existence of B → D*ηπ decays with BF of 4 × 10−3 , which could imply a BF of B → D*ηπ of about 2 × 10−4 . Using the full sample collected by the Belle II experiment in 2019-2022, the expected upper limit on the BF of B → D*ηπ is 1 × 10−4 . This search would also improve knowledge of the B hadronic sector significantly.
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