Semileptonic and radiative decays of the B{sub c} meson in the light-front quark model
- Department of Physics, Teachers College, Kyungpook National University, Daegu, 702-701 (Korea, Republic of)
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202 (United States)
We investigate the exclusive semileptonic B{sub c}{yields}(D,{eta}{sub c},B,B{sub s})l{nu}{sub l}, {eta}{sub b}{yields}B{sub c}l{nu}{sub l} (l=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{sub +}(q{sup 2}) and f{sub -}(q{sup 2}) are obtained from the analytic continuation method in the q{sup +}=0 frame. While the form factor f{sub +}(q{sup 2}) is free from the zero mode, the form factor f{sub -}(q{sup 2}) is not free from the zero mode in the q{sup +}=0 frame. We quantify the zero-mode contributions to f{sub -}(q{sup 2}) for various semileptonic B{sub 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 the 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{sub c}*{yields}B{sub c}+{gamma} decay turns out to be very sensitive to the mass difference between B{sub c}* and B{sub c} mesons, the decay width {gamma}(B{sub c}*{yields}B{sub c}{gamma}) may help in determining the mass of B{sub 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 the quark and antiquark in the heavy meson system.
- OSTI ID:
- 21322592
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 5; Other Information: DOI: 10.1103/PhysRevD.80.054016; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANTIQUARKS
B C MESONS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
D QUARKS
ELECTRON NEUTRINOS
FORECASTING
FORM FACTORS
GAMMA DECAY
HAMILTONIANS
HARMONIC OSCILLATORS
MAGNETIC DIPOLES
MASS
MASS DIFFERENCE
MUON NEUTRINOS
QUANTUM CHROMODYNAMICS
QUARK MODEL
RADIATIVE DECAY
SEMILEPTONIC DECAY
TAU NEUTRINOS
U QUARKS
WAVE FUNCTIONS