The BππνˉB \rightarrow \pi \pi \ell \bar{\nu} transition

Jun 4, 2024
11 pages
Published in:
  • PoS EuroPLEx2023 (2024) 018
Contribution to:
  • Published: Jun 4, 2024

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Abstract: (SISSA)
VubV_{ub} is the smallest and least known of all CKM matrix elements; it is currently determined primarily through the exclusive process BπνˉB\to\pi\ell\bar{\nu}, and additional channels to determine it are welcomed by the community. We will present progress toward a lattice QCD determination of Vub|V_{ub}| from the BππνˉB\to\pi\pi\ell\bar{\nu} process, where the ππ\pi\pi system is in a PP-wave and features the ρ(770)\rho(770) resonance as an enhancement. After an overview of the theoretical framework, we will discuss some preliminary results.