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

Abstract

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.

Authors:
 [1]
  1. Department of Physics, Teachers College, Kyungpook National University, Daegu, 702-701 (Korea, Republic of)
Publication Date:
OSTI Identifier:
21020253
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.073016; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Choi, Ho-Meoyng. Decay constants and radiative decays of heavy mesons in light-front quark model. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.073016.
Choi, Ho-Meoyng. Decay constants and radiative decays of heavy mesons in light-front quark model. United States. doi:10.1103/PHYSREVD.75.073016.
Choi, Ho-Meoyng. Sun . "Decay constants and radiative decays of heavy mesons in light-front quark model". United States. doi:10.1103/PHYSREVD.75.073016.
@article{osti_21020253,
title = {Decay constants and radiative decays of heavy mesons in light-front quark model},
author = {Choi, Ho-Meoyng},
abstractNote = {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.},
doi = {10.1103/PHYSREVD.75.073016},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}