Journal of High Energy Physics (Feb 2024)
The q 2 moments in inclusive semileptonic B decays
Abstract
Abstract 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 α s 2 β 0 $$ O\left({\alpha}_s^2{\beta}_0\right) $$ 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.
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