3 research outputs found
Radiative M1-decays of heavy-light mesons in the relativistic quark model
Radiative magnetic dipole decays of heavy-light vector mesons into
pseudoscalar mesons V -> P\gamma are considered within the relativistic quark
model. The light quark is treated completely relativistically, while for the
heavy quark the 1/m_Q expansion is used. It is found that relativistic effects
result in a significant reduction of decay rates. Comparison with previous
predictions and recent experimental data is presented.Comment: 11 pages, 2 figures, few comments added, version to appear in Phys.
Lett.
A Heavy-Light Chiral Quark Model
We present a new chiral quark model for mesons involving a heavy and a light
(anti-) quark. The model relates various combinations of a quark - meson
coupling constant and loop integrals to physical quantities. Then, some
quantities may be predicted and some used as input. The extension from other
similar models is that the present model includes the lowest order gluon
condensate of the order (300 MeV)^4 determined by the mass splitting of the 0^-
and the 1^- heavy meson states. Within the model, we find a reasonable
description of parameters such as the decay constants f_B and f_D, the
Isgur-Wise function and the axial vector coupling g_A in chiral perturbation
theory for light and heavy mesons.Comment: 31 pages, 13 figures, RevTex4.