TY - JOUR
T1 - A lattice QCD study of the B → ππℓ(equation presented) transition
AU - Leskovec, Luka
AU - Meinel, Stefan
AU - Petschlies, Marcus
AU - Negele, John
AU - Paul, Srijit
AU - Pochinsky, Andrew
AU - Rendon, Gumaro
N1 - Funding Information: We thank Kostas Orginos, Balint Joó, Robert Edwards, and their collaborators for providing the gauge-field configurations. Computations for this work were carried out in part on (1) facilities of the USQCD Collaboration, which are funded by the Office of Science of the U.S. Department of Energy, (2) facilities of the Leibniz Supercomputing Centre, which is funded by the Gauss Centre for Supercomputing, (3) facilities at the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH1123, (4) facilities of the Extreme Science and Engineering Discovery Environment (XSEDE), which was supported by National Science Foundation grant number ACI-1548562, and (5) the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725. L.L. acknowledges the project (J1-3034) was financially supported by the Slovenian Research Agency. S.M. is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics under Award Number DE-SC0009913. J.N. and A.P. acknowledge support by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under grants DE-SC-0011090 and DE-SC0018121 respectively. A.P. acknowledges support by the “Fundamental nuclear physics at the exascale and beyond” under grant DE-SC0023116. Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
PY - 2023/4/6
Y1 - 2023/4/6
N2 - 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.
AB - 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.
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M3 - Conference article
SN - 1824-8039
VL - 430
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 416
T2 - 39th International Symposium on Lattice Field Theory, LATTICE 2022
Y2 - 8 August 2022 through 13 August 2022
ER -