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Inclusive semileptonic decays from lattice QCD: Analysis of systematic effects

Ryan Kellermann* and Zhi Hu

Alessandro Barone

Ahmed Elgaziari

Shoji Hashimoto and Takashi Kaneko

Andreas Jüttner

  • *Contact author: kelry@post.kek.jp
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Phys. Rev. D 112, 014501 – Published 1 July, 2025

DOI: https://doi.org/10.1103/kltp-1p1f

Abstract

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 Ds→Xsℓν 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.

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Outline

Information

Phys. Rev. D 112, 014501– Published 1 July, 2025
  • Received 9 April 2025
  • Accepted 27 May 2025
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