Perturbative corrections to power suppressed effects in B ¯ $$ \overline{B} $$ → X u ℓν

Bernat Capdevila (Dipartimento di Fisica & INFN, Università di Torino, Via Giuria 1, Torino, I-10125, Italy) ; Paolo Gambino (Dipartimento di Fisica & INFN, Università di Torino, Via Giuria 1, Torino, I-10125, Italy) ; Soumitra Nandi (Department of Physics, Indian Institute of Technology Guwahati, Guwahati, Assam, 781 039, India)

We compute the O(α s ) corrections to the Wilson coefficients of the dimension five operators in inclusive semileptonic B decays in the limit of a massless final quark. Our calculation agrees with reparametrization invariance and with previous results for the total width and improves the constraints on the shape functions that enter those decays.

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      "surname": "Gambino", 
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      "title": "Perturbative corrections to power suppressed effects in   <math> <mover> <mi>B</mi> <mo>\u00af</mo> </mover> </math>  $$ \\overline{B} $$  \u2192 X  u  \u2113\u03bd"
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Published on:
14 April 2021
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2021 (2021)
Issue 4
Pages 1-21
DOI:
https://doi.org/10.1007/JHEP04(2021)137
arXiv:
2102.03343
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: