Long distance contributions in $D \to V γ$ decays

Details Long distance contributions in $D \to V γ$ decays Long distance contributions in $D \to V γ$ decays

1998-01-13

arxiv.org/abs/hep-ph/9801279v2

Eur.Phys.J.C6:471-476,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, latex, 2 figures; we have changed Table 2 and the caption of Table 1. To be published in Eur. Phys. C

Scientific paper

10.1007/s100520050356

Using the factorization scheme for the nonleptonic $D \to V V_0$ weak amplitudes, we classify all diagrams which arise in $D \to V \gamma$ decays and calculate them with the help of the hybrid model which combines the heavy quark effective theory and the chiral Lagrangian approach. Thus we determine the long distance contribution to the amplitudes of Cabibbo allowed and Cabibbo suppressed $D \to V\gamma$ decays. The calculation of the expected range of the branching ratios of nine different $D \to V \gamma$ channels is compared with results of other approaches. The present work establishes an increase of the parity violating contribution in these decays in comparison with previous analyses.

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