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A bstract We compute the first moments of the q 2 distribution in inclusive semileptonic B decays as functions of the lower cut on q 2, confirming a number of results given in the literature and adding the O (ₛ²₀) O α s 2 β 0 BLM contributions. We then include the q 2 -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.
Finauri et al. (Mon,) studied this question.