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Article
Report number	arXiv:2403.03976 ; CERN-TH-2024-025 ; ZU-TH 14/24
Title	NNLO QCD corrections to the q$^{2}$ spectrum of inclusive semileptonic B-meson decays
Author(s)	Fael, Matteo (CERN) ; Herren, Florian (Zurich U.)
Publication	2024-05-24
Imprint	2024-03-06
Number of pages	19
In:	JHEP 2405 (2024) 287
DOI	10.1007/JHEP05(2024)287
Subject category	hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology
Abstract	We calculate the next-to-next-to-leading order QCD corrections to the leptonic invariant mass ($q^2$) spectrum of semileptonic $b \to c$ inclusive decays, taking into account the mass of the charm quark and the charged lepton in the final state. We obtain analytic results in terms of generalized polylogarithms and present numerical studies of the $\mathcal{O}(\alpha_s^2)$ corrections to the $q^2$ spectrum of $b \to c \ell \bar \nu_\ell$ decays, for $\ell =e, \mu$ and $\tau$, in the kinetic scheme. Our computation can be used to incorporate the recent measurements of $q^2$ moments by Belle and Belle II into global fits of inclusive semileptonic $B$-decays.
Copyright/License	publication: © 2024 The Authors (License: CC-BY-4.0), sponsored by SCOAP³ preprint: (License: CC BY 4.0)

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