Proceedings of 34th Annual International Symposium on Lattice Field Theory — PoS(LATTICE2016) 2017
DOI: 10.22323/1.256.0296
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Form Factors for semi-leptonic $B$ decays

Abstract: Semi-leptonic B decays provide promising channels to test the Standard Model, search for signs of new physics, or determine fundamental parameters like CKM matrix elements. We present an update on our calculation of short distance contributions to GIM suppressed rare B decays focusing in particular on B s → φ + − decays. Furthermore we show first results for our calculation ofν semi-leptonic decays involving b → c transitions. Our calculations are based on RBC-UKQCD's 2+1 flavor domain-wall fermion and Iwasaki… Show more

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Cited by 8 publications
(5 citation statements)
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“…Here we presented the status of our analysis for B → π ν, B → D ν, B s → K ν, and B s → D s ν. In addition to the charged current decays with pseudoscalar final state, our framework also includes operators to determine W ± mediated decays to vector final states as well as Glashow-Iliopoulos-Maiani (GIM) suppressed neutral current decays [66,67].…”
Section: Discussionmentioning
confidence: 99%
“…Here we presented the status of our analysis for B → π ν, B → D ν, B s → K ν, and B s → D s ν. In addition to the charged current decays with pseudoscalar final state, our framework also includes operators to determine W ± mediated decays to vector final states as well as Glashow-Iliopoulos-Maiani (GIM) suppressed neutral current decays [66,67].…”
Section: Discussionmentioning
confidence: 99%
“…A more standard approach is to adopt the so-called narrow-width approximation, e.g., [67]. Interestingly, for the cases B → K * and B s → φ, of special interest in the context of B discrepancies, all local form factors are available, both from lattice QCD [46,48,[68][69][70][71] and with light cone sum rules [45, 65,72]. Similarly as in the case M = a pseudoscalar, the two approaches hold for large and respectively small q 2 -the region in between being narrow charmonium.…”
Section: Phenomenology Ofmentioning
confidence: 99%
“…There was a n f = 2 determination by the ETMC collaboration [48] in which they also determined the ratio of the tensor form factor to f + near zero recoil. The RBC/UKQCD collaboration presented preliminary results in [49,50] and these were updated at this conference [44]. The preliminary results for their form factors are shown in Fig.…”
Section: B S → D Smentioning
confidence: 99%