Vector and pseudoscalar charm meson radiative decays

Abstract

Combining heavy quark effective theory and the chiral Lagrangian approach we investigate radiative decays of pseudoscalar $D$ mesons. We first reanalyse $D^{\ast }\to D\gamma$ decays within the effective Lagrangian approach using heavy quark spin symmetry, chiral symmetry Lagrangian, but including also the light vector mesons. We then investigate $D\to V\gamma$ decays and calculate the $D^0\to {\bar{K}}^{\ast 0}\gamma$ and $D^{s+}\to {\rho }^{+}\gamma$ partial widths and branching ratios.

Comments: 21 pages Latex, no figures, IJS-TP-94/19, TUM-31-62/94, NUHEP-TH-94-9