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arXiv · 2504.03358

Inclusive semileptonic decays from lattice QCD: analysis of systematic effects

Ryan Kellermann·Alessandro Barone·Ahmed Elgaziari·Shoji Hashimoto·Zhi Hu·Andreas Jüttner·Takashi Kaneko
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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 multi-body final states. We investigate them for the lattice data of $D_s \to X_s \ell\nu$ decays, obtained using M\"obius 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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Ryan Kellermann, Alessandro Barone, Ahmed Elgaziari, Shoji Hashimoto, Zhi Hu, Andreas Jüttner, Takashi Kaneko. 2025-04-04. Inclusive semileptonic decays from lattice QCD: analysis of systematic effects. https://arxiv.org/abs/2504.03358

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