Decay constants and radiative decays of heavy mesons in light-front quark model

Journal Article · Sun Apr 01 00:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.75.073016· OSTI ID:21020253

Choi, Ho-Meoyng ^[1]

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1. Department of Physics, Teachers College, Kyungpook National University, Daegu, 702-701 (Korea, Republic of)

We investigate the magnetic dipole decays V{yields}P{gamma} of various heavy-flavored mesons such as (D,D*,D{sub s},D{sub s}*,{eta}{sub c},J/{psi}) and (B,B*,B{sub s},B{sub s}*,{eta}{sub b},{upsilon}) using the light-front quark model constrained by the variational principle for the QCD-motivated effective Hamiltonian. The momentum dependent form factors F{sub VP}(q{sup 2}) for V{yields}P{gamma}* decays are obtained in the q{sup +}=0 frame and then analytically continued to the timelike region by changing q{sub perpendicular} to iq{sub perpendicular} in the form factors. The coupling constant g{sub VP{gamma}} for real photon case is then obtained in the limit as q{sup 2}{yields}0, i.e. g{sub VP{gamma}}=F{sub VP}(q{sup 2}=0). The weak decay constants of heavy pseudoscalar and vector mesons are also calculated. Our numerical results for the decay constants and radiative decay widths for the heavy-flavored mesons are overall in good agreement with the available experimental data as well as other theoretical model calculations.

• OSTI ID: 21020253
• Journal Information: Physical Review. D, Particles Fields, Vol. 75, Issue 7; Other Information: DOI: 10.1103/PhysRevD.75.073016; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
COUPLING CONSTANTS
D MESONS
D S MESONS
D*-2010 MESONS
ELECTROMAGNETIC FORM FACTORS
ETA MESONS
FLAVOR MODEL
HADRONIC PARTICLE DECAY
HAMILTONIANS
J PSI-3097 MESONS
MAGNETIC DIPOLES
PARTICLE WIDTHS
PHOTONS
QUANTUM CHROMODYNAMICS
QUARK MODEL
RADIATIVE DECAY
RESONANCE PARTICLES
VARIATIONAL METHODS