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SUMMARY:Bernat Capdevila - Inclusive semileptonic B-meson decays and CKM m
 atrix determinations: challenges and theoretical framework(s). - Bernat Ca
 pdevila - (Turin) 
DTSTART:20220506T150000Z
DTEND:20220506T160000Z
UID:TALK173240@talks.cam.ac.uk
CONTACT:Maeve Madigan
DESCRIPTION:The CKM matrix is a key ingredient in the study of CP violatio
 n and in New Physics searches within the flavour sector. Therefore\, preci
 se determinations of its matrix elements are of utmost importance. |Vub| a
 nd |Vcb| can be extracted from both exclusive semileptonic b —> u and b 
 —> c decays and the inclusive channels B —> Xu l nu and B —> Xc l nu
 . Exclusive and inclusive determinations of these matrix elements have bee
 n in tension for a long time\, with even different theoretical frameworks 
 not agreeing well with one another. In this seminar\, I am going to review
  some of the techniques employed in the study of inclusive semileptonic B-
 meson decays and present the results of our latest inclusive determination
  of |Vcb|. Then\, I will discuss the challenges one needs to face in order
  to obtain a solid description for B —> Xu l nu and some of the solution
 s proposed. Finally\, I will present the first calculation of power-suppre
 ssed perturbative corrections in B —> Xu l nu and show the first prelimi
 nary results of our determination of the necessary non-perturbative functi
 ons within a neural network approach.
LOCATION:Potter Room (B1.19)
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