Long distance contributions in D → Vγ decays

Long distance contributions in D → Vγ decays

Using the factorization scheme for the nonleptonic D → > VV0 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 d...

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Veröffentlicht in:The European physical journal. C, Particles and fields Particles and fields, 1999-01, Vol.6 (3), p.471-476
Hauptverfasser: Fajfer, S., Prelovšek, S., Singer, P.
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Sprache:eng
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Amplitudes
Decay
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container_title The European physical journal. C, Particles and fields
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Singer, P.
description Using the factorization scheme for the nonleptonic D → > VV0 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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subjects Amplitudes
Decay
title Long distance contributions in D → Vγ decays
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