Vub is the smallest and least known of all CKM matrix elements; the community currently determines its magnitude primarily through the exclusive process B → πℓ(equation presented). Here we present our progress toward a lattice QCD determination of the Vub matrix element from a novel transition - the B → ππℓ(equation presented) process, where the ππ system is in a P wave and scattering features the ρ(770) resonance as an enhancement. We perform our calculation on Nf = 2 + 1 isotropic clover fermions on a lattice of L ≈ 3.6 fm and a pion mass of ≈ 320 MeV; for the b-quark we use the anisotropic clover action. After a brief overview of the theoretical framework, we will discuss some preliminary results.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - Apr 6 2023|
|Event||39th International Symposium on Lattice Field Theory, LATTICE 2022 - Bonn, Germany|
Duration: Aug 8 2022 → Aug 13 2022
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