B → πlν form factors calculated on the light-front

Chi Yee Cheung, Chien Wen Hwang, Wei Min Zhang

研究成果: Article同行評審

35 引文 斯高帕斯(Scopus)

摘要

A consistent treatment of B → πlν decay is given on the light-front. The B to π transition form factors are calculated in the entire physical range of momentum transfer for the first time. The valence-quark contribution is obtained using relativistic light-front wave functions. Higher quark-antiquark Fock-state of the B-meson bound state is represented effectively by the |B*π〉 configuration, and its effect is calculated in the chiral perturbation theory. Wave function renormalization is taken into account consistently. The |B*π〉) contribution dominates near the zero-recoil point (q2 ≃ 25 GeV2), and decreases rapidly as the recoil momentum increases. The calculated form factor f+(q2) follows approximately a dipole q2-dependence in the entire range of momentum transfer. We estimate that |Vub|=0.003.

原文English
頁(從 - 到)657-664
頁數8
期刊Zeitschrift fur Physik C-Particles and Fields
75
發行號4
DOIs
出版狀態Published - 1997 八月

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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