B -> pi, B(s) -> K form factors and Vub determination

2008/10/07 by Blazenka Melic, Melic, Blazenka
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.0810.1144

parallel talk at ICHEP08, Philadelphia, USA, July 2008; 4 pages, LaTeX, 1 eps figure

arxiv created 2008/10/07 · arxiv updated 2009/12/01

Abstract

We present a QCD light-cone sum rule (LCSR) estimation of the B -> pi, B -> K, and Bs -> K form factors calculating gluon radiative corrections at next-to-leading order. The MS-bar b-quark mass is used, instead of the one-loop pole mass employed in the previous analyses. For B -> K and Bs -> K form factors the SU(3)-symmetry breaking corrections are included, both in the hard-scattering kernels and in the distribution amplitudes (DAs). By combining the predicted value for f⁺_Bpi(0) with the product |Vub f⁺_Bpi| extracted from the B -> pi l nu measurement, we obtain the LCSR prediction for Vub CKM matrix element.

Related

• New LCSR predictions for hadronic form factors
• Precision calculations of B→ K^* form factors from SCET sum rules beyond leading-power contributions
• B→ P,V form factors with the B-meson light-cone sum rules
• Next-to-Next-to-Leading-Order Corrections to the B → π Form Factors from Light-Cone Sum Rules
• QCD Calculation of B Meson Form Factors and Exclusive Nonleptonic Decays