Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-12-13
Mod.Phys.Lett. A18 (2003) 799
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages LaTeX. Discussion about the difference between the Wandzura-Wilczek approximation and the full result for the first mo
Scientific paper
10.1142/S021773230300985X
In the heavy-quark limit, the valence Fock-state components in the B mesons are described by a set of two light-cone wavefunctions. We show that these two wavefunctions obey simple coupled differential equations, which are based on the equations of motion in the Heavy Quark Effective Theory (HQET), and the analytic solutions for them are obtained. The results generalize the recently obtained longitudinal-momentum distribution in the Wandzura-Wilczek approximation by including the transverse momenta. We find that the transverse momentum distribution depends on the longitudinal momentum of the constituents, and that the wavefunctions damp very slowly for large transverse separation between quark and antiquark.
Kawamura Hiroyuki
Kodaira Jiro
Qiao Cong-Feng
Tanaka Kazuhiro
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