Semileptonic decays in the light-front quark model

✍ Scribed by Ho-Meoyng Choi; Chueng-Ryong Ji

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 247 KB
• Volume: 199
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2010.02.037

✦ Synopsis

We investigate the exclusive semileptonic B c → (D, η c , B, B s ) ν , η b → B c ν ( = e, μ, τ ) decays using the light-front quark model constrained by the variational principle for the QCD motivated effective Hamiltonian. The form factors f + (q 2 ) and f -(q 2 ) are obtained from the analytic continuation method in the q + = 0 frame. While the form factor f + (q 2 ) is free from the zero mode, the form factor f -(q 2 ) is not free from the zero mode in the q + = 0 frame. Using our effective method to relate the non-wave function vertex to the light-front valence wave function, we incorporate the zero-mode contribution as a convolution of zero-mode operator with the initial and final state wave functions.