Speaker
Teseo San Jose
(University of Edinburgh)
Description
The unitarity of the CKM matrix is a fundamental property of the Standard Model, and leptonic decays of pseudoscalar mesons $P \to \ell\nu(\gamma)$ are an important avenue to probe this experimentally. The theoretical prediction of the decay rate depends on a number of form factors, which can be calculated using lattice QCD. We present an approach to compute them using a JLQCD domain-wall fermion ensemble with $m_\pi=284~\text{MeV}$ and $a=0.044~\text{fm}$. We focus on the radiative decay $P \to \ell\nu\gamma$, where the photon is on-shell and $P$ is either a $D$, a $D_s$ or a $B$. The determination of the corresponding vector and axial form factors $F_V$ and $F_A$ give access to $|V_{cd}|$, $|V_{cs}|$, and $|V_{ub}|$.
| Parallel Session (for talks only) | Quark and lepton flavor physics |
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Author
Teseo San Jose
(University of Edinburgh)
