Precision measurements of weak interaction parameters at Belle and Belle II

Sumitted to PubDB: 2024-11-29

Category: Talk, Visibility: Latest Version Public

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Authors	Ansu Johnson
Date	2024-11-29
Belle II Number	BELLE2-TALK-DRAFT-2024-169
Abstract	The Belle and Belle II experiments are pivotal in advancing our understanding of the weak interaction and its role within the Standard Model. This talk will focus on recent precision measurements of the CKM unitarity angle \( \phi_2 (\alpha) \) using channels \( B \to \pi^0 \pi^0 \) and \( B^0 \to \rho^+ \rho^- \), as well as the first combined \( \phi_3 (\gamma) \) measurement from Belle and Belle II. Additionally, the latest results on the CKM matrix elements \( \|V_{cb}\| \) and \( \|V_{ub}\| \), which constrain the sides of the unitarity triangle, will be presented. Exclusive decay measurements such as \( B \to D^{(*)} \ell \nu_\ell \) and \( B \to \pi \ell \nu_\ell \), along with their theoretical challenges and experimental uncertainties, will be discussed. Constraining the unitarity triangle tests the Standard Model's consistency, while deviations could indicate physics beyond the Standard Model. This talk will highlight the achievements of Belle and Belle II and their contributions to precision flavor physics.
Conference	BCVSPIN 2024