Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8193624 | Physics Letters B | 2010 | 6 Pages |
Abstract
Bâ(Ï,η,ηâ²) transition form factors are investigated in the covariant light-front approach. With theoretical uncertainties, we find that Bâ(Ï,η,ηâ²) form factors at q2=0 are f+(Ï,η,ηâ²)(0)=(0.245â0.001+0.000±0.011,0.220±0.009±0.009,0.180±0.008â0.007+0.008) for vector current and fT(Ï,η,ηâ²)(0)=(0.239â0.003â0.018+0.002+0.020,0.211±0.009â0.015+0.017,0.173±0.007â0.013+0.014) for tensor current, respectively. With the obtained q2-dependent f+Ï(q2) and observed branching ratio (BR) for B¯dâÏ+âν¯â, the Vub is found as |Vub|LF=(3.99±0.13)Ã10â3. As a result, the predicted BRs for B¯â(η,ηâ²)âν¯â decays with â=e,μ are given by (0.49â0.04â0.07+0.02+0.10,0.24â0.02â0.03+0.01+0.04)Ã10â4, while the BRs for Dââ(η,ηâ²)âν¯â are (11.1â0.6â0.9+0.5+0.9,1.79â0.08â0.12+0.07+0.12)Ã10â4. In addition, we also study the integrated lepton angular asymmetries for B¯â(Ï,η,ηâ²)Ïν¯Ï: (0.277â0.001â0.007+0.001+0.005,0.290â0.000â0.003+0.002+0.003,0.312â0.000â0.006+0.004+0.005).
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Chuan-Hung Chen, Yue-Long Shen, Wei Wang,