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|Vub| and B→η(′) form factors in covariant light-front approach by Chuan-Hung Chen; Yue-Long Shen; Wei Wang is a Physics and Astronomy article available to read on EtoBox.

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B → (π , η, η ) transition form factors are investigated in the covariant light-front approach. With theoretical uncertainties, we find that B → (π , η, η ) form factors at q 2 = 0 are f (π ,η,η ) + (0) = (0.245 +0.000 -0.001 ± 0.011, 0.220 ± 0.009 ± 0.009, 0.180 ± 0.008 +0.008 -0.007 ) for vector current and f -0.003-0.018 , 0.211 ± 0.009 +0.017 -0.015 , 0.173 ± 0.007 +0.014 -0.013 ) for tensor current, respectively. With the obtained q 2 -dependent f π + (q 2 ) and observed branching ratio (BR) for Bd → π + ν , the V ub is found as |V ub | L F = (3.99 ± 0.13) × 10 -3 . As a result, the predicted BRs for B → (η, η ) ν decays with = e, μ are given by (0.49 +0.02+0.10 -0.04-0.07 , 0.24 +0.01+0.04 -0.02-0.03 ) × 10 -4 , while the BRs for D -→ (η, η ) ν are (11.1 +0.5+0.9 -0.6-0.9 , 1.79 +0.07+0.12 -0.08-0.12 ) × 10 -4 . In addition, we also study the integrated lepton angular asymmetries for B → (π , η, η )τ ντ : (0.277 +0.

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Author

Chuan-Hung Chen; Yue-Long Shen; Wei Wang

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0370-2693)

Published

2010

Language

EN

Field

Physics and Astronomy (Physical Sciences)