The q² moments in inclusive semileptonic B decays

2023/10/31 by Gael Finauri, Finauri, Gael, Paolo Gambino +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2310.20324

openalex publication_date 2023/10/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We compute the first moments of the q² distribution in inclusive semileptonic B decays as functions of the lower cut on q², confirming a number of results given in the literature and adding the O(α_s²β₀) BLM contributions. We then include the q²-moments recently measured by Belle and Belle II in a global fit to the moments. The new data are compatible with the other measurements and slightly decrease the uncertainty on the nonperturbative parameters and on |V_cb|. Our updated value is |V_cb|=(41.97± 0.48)× 10^-3.

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