Inclusive semileptonic decays from lattice QCD: Analysis of systematic effects
Ryan Kellermann (High Energy Accelerator Research Organization (KE K), Ibaraki 305-0801, Japan); Zhi Hu (High Energy Accelerator Research Organization (KE K), Ibaraki 305-0801, Japan); Alessandro Barone (PRISMA+ Cluster of Excellence and Institut für Kernphysik, Johannes-Gutenberg-Universität Mainz, D-55099 Mainz, Germany); Ahmed Elgaziari (School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom and STAG Research Center, University of Southampton, Southampton SO17 1BJ, United Kingdom); Shoji Hashimoto (School of High Energy Accelerator Science, SOKENDAI (The Graduate University for Advanced Studies), Ibaraki 305-0801, Japan and High Energy Accelerator Research Organization (KEK), Ibaraki 305-0801, Japan); et al - Show all 7 authors
Lattice QCD calculations of inclusive semileptonic decay rates involve new types of systematic effects, such as truncation errors in the estimation of energy integrals, or finite-volume effects for multibody final states. We investigate them for the lattice data of decays, obtained using Möbius domain-wall fermions. Separating the ground-state and excited-state contributions results in better control over these systematic effects. With the Chebyshev polynomial approximation, the truncation error is under control, while the finite-volume effects are estimated using a model to describe two-body final states.
