Semileptonic and radiative decays of the B_c meson in light-front quark model

Details Semileptonic and radiative decays of the B_c meson in light-front quark model Semileptonic and radiative decays of the B_c meson in light-front quark model

2009-03-03

arxiv.org/abs/0903.0455v2

Phys.Rev.D80:054016,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 12figures; extensively revised the version including discussion of the light-front zero-mode contribution to the wea

Scientific paper

10.1103/PhysRevD.80.054016

We investigate the exclusive semileptonic $B_c\to (D,\eta_c,B,B_s)\ell\nu_\ell$, $\eta_b\to B_c\ell\nu_\ell$($\ell=e,\mu,\tau$) 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. We quantify the zero-mode contributions to $f_-(q^2)$ for various semileptonic $B_c$ decays. 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. Our results are then compared to the available experimental data and the results from other theoretical approaches. Since the prediction on the magnetic dipole $B^*_c\to B_c+\gamma$ decay turns out to be very sensitive to the mass difference between $B^*_c$ and $B_c$ mesons, the decay width $\Gamma(B^*_c \to B_c \gamma)$ may help in determining the mass of $B^*_c$ experimentally. Furthermore, we compare the results from the harmonic oscillator potential and the linear potential and identify the decay processes that are sensitive to the choice of confining potential. From the future experimental data on these sensitive processes, one may obtain more realistic information on the potential between quark and antiquark in the heavy meson system.

Affiliated with

Also associated with

No associations

Rating

Semileptonic and radiative decays of the B_c meson in light-front quark model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Semileptonic and radiative decays of the B_c meson in light-front quark model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semileptonic and radiative decays of the B_c meson in light-front quark model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-652718