Long distance contributions in D → Vγ decays
J. Stefan Institute, Jamova 39, P. O. Box 300, 1001, Ljubljana, Slovenia
2 Department of Physics, Technion — Israel Institute of Technology, 32000, Haifa, Israel
Published online: 17 September 2013
Using the factorization scheme for the nonleptonic D → > VV 0 weak amplitudes, we classify all diagrams which arise in D → Vγ 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 → Vγ decays. The calculation of the expected range of the branching ratios of nine different D → Vγ 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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