Strange-quark mass effects in the B_s meson's light-cone distribution amplitude

2023/06/26 by Thorsten Feldmann, Feldmann, Thorsten, Philip Lüghausen +3 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2306.14686

openalex publication_date 2023/06/26 · openalex created_date 2023/06/28 · openalex updated_date 2026/07/28

Abstract

We investigate the differences between the light-cone distribution amplitudes (LCDAs) of B_s mesons and B_q mesons (with q=u,d) induced by a non-vanishing strange-quark mass m_s≠ 0 (compared to m_q ≃ 0). To this end, we consider the so-called ''radiative tail'' which is related to the short-distance expansion of the relevant light-ray operators in heavy-quark effective theory. We extend the calculation of the according matching coefficients, including operators linear in m_s for both the leading and sub-leading 2-particle LCDAs. Based on a generic parameterization for the leading LCDA, we discuss the effect on its shape on a quantitative level, and compare our findings with recent results on the inverse moments of the B_q and B_s LCDAs from QCD sum rules.

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• Lessons from LHCb and Belle II measurements of B→ J/ψπ and B→ J/ψK decays

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