Sahar Gholipourverki
- BSc (University of Tehran, 2017)
Topic
Feasibility Study for Measuring the B^- → D^(∗)0 [eta]ℓ^− v Branching Fraction
Department of Physics and Astronomy
Date & location
- Wednesday, August 14, 2024
- 10:00 A.M.
- Clearihue Building, Room B007
Examining Committee
Supervisory Committee
- Dr. Robert Kowalewski, Department of Physics and Astronomy, University of Victoria (Supervisor)
Dr. Michael Roney, Department of Physics and Astronomy, UVic (Member)
External Examiner
- Dr. Manuel Franco Sevilla, Department of Physics, University of Maryland
Chair of Oral Examination
- Dr. Randy Scharien, Department of Geography, UVic
Abstract
Semileptonic 𝐵 meson decays provide a direct method to measure the parameters of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, which is essential for understanding quark mixing and CP violation in the Standard Model. This thesis presents an exploratory study on the Branching Fraction of the 𝐵 meson decay mode 𝐵−→𝐷(∗)0𝜂ℓ−𝜈̅ℓ which has never been measured. Here, ℓ represents either an electron or a muon, 𝜈ℓ denotes the corresponding lepton neutrino, 𝐷(∗) refers to either a 𝐷 meson or its excited state 𝐷∗, and 𝜂 symbolizes the eta meson. In this analysis to reduce the significantly higher occurrence of background events compared to signal candidates, both 𝐵 mesons are reconstructed semileptonically. The tag-side B meson predominantly decays via 𝐵+→𝐷̅(∗)0ℓ+𝜈ℓ. This investigation aims to contribute to a more comprehensive understanding of 𝐵 meson semileptonic decays by attempting to bridge the gap between the measurements of exclusive semileptonic decay modes and the summation of all measured exclusive semileptonic decays, and improve the understanding of the background in lepton flavor-violating decay modes such as 𝐵→𝐷(∗)𝜏𝜈𝜏 .