TY - JOUR
T1 - Lattice Study of Spectator Effects in b-hadron Decays
AU - Lin, Joshua
AU - Detmold, William
AU - Meinel, Stefan
N1 - Funding Information: The computations for this work were carried out on 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. SM is supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics under Award Number DE-SC0009913. WD and JL are supported by the U.S. Department of Energy (DOE) grant DE-SC0011090. WD is also supported in part by the SciDAC5 award DESC0023116 and by the National Science Foundation under Cooperative Agreement PHY-2019786 (The NSF AI Institute for Artificial Intelligence and Fundamental Interactions, http://iaifi.org/). 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 - The Heavy Quark Expansion (HQE) gives an expansion of inclusive decay rates of b-hadrons as a simultaneous series in αs and 1/mb, in terms of perturbatively defined coefficients and non-perturbative matrix elements. Spectator effects arise from the dimension-6 operators in the HQE in which along with the heavy quark, a light spectator quark from the hadron participates in the weak decay. In this work, we provide a lattice determination of the bare matrix elements that contribute to the spectator effects for the B+-meson, Bd-meson and the Λb-baryon. The computations were performed on two separate lattice spacings of the RBC-UKQCD (2+1)-flavor Domain Wall Fermion ensembles. Renormalization and continuum extrapolation of the matrix elements have not yet been computed, and are left to future work.
AB - The Heavy Quark Expansion (HQE) gives an expansion of inclusive decay rates of b-hadrons as a simultaneous series in αs and 1/mb, in terms of perturbatively defined coefficients and non-perturbative matrix elements. Spectator effects arise from the dimension-6 operators in the HQE in which along with the heavy quark, a light spectator quark from the hadron participates in the weak decay. In this work, we provide a lattice determination of the bare matrix elements that contribute to the spectator effects for the B+-meson, Bd-meson and the Λb-baryon. The computations were performed on two separate lattice spacings of the RBC-UKQCD (2+1)-flavor Domain Wall Fermion ensembles. Renormalization and continuum extrapolation of the matrix elements have not yet been computed, and are left to future work.
UR - http://www.scopus.com/inward/record.url?scp=85153267698&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85153267698&partnerID=8YFLogxK
M3 - Conference article
SN - 1824-8039
VL - 430
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 417
T2 - 39th International Symposium on Lattice Field Theory, LATTICE 2022
Y2 - 8 August 2022 through 13 August 2022
ER -