Charm Radiative Decays with Neutral Mesons D^0 -> K^0(bar) pi^0 gamma, D^0 -> K^0(bar) eta (eta') gamma

Details Charm Radiative Decays with Neutral Mesons D^0 -> K^0(bar) pi^0 gamma, D^0 -> K^0(bar) eta (eta') gamma Charm Radiative Decays with Neutral Mesons D^0 -> K^0(bar) pi^0 gamma, D^0 -> K^0(bar) eta (eta') gamma

2002-10-30

arxiv.org/abs/hep-ph/0210423v1

Phys.Lett. B550 (2002) 77-84

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 2 figures

Scientific paper

10.1016/S0370-2693(02)02964-7

The radiative decays D^0 -> K^0(bar) P^0 gamma with nonresonant K^0(bar) P^0 (P^0 = pi^0, eta, eta') are considered within the framework which combines heavy quark effective theory and the chiral Lagrangian. Due to neutral mesons the amplitudes do not have bremsstrahlung contributions. We assume factorization for the weak matrix elements. Light (virtual) vector mesons are found to give the main contribution to the decay amplitudes. The decay D^0 -> K^0(bar) pi^0 gamma is predicted to have a branching ratio of 3 x 10^(-4), with comparable contributions from parity-conserving and parity-violating parts of the amplitude. The decays with eta (eta') in the final state are expected with branching ratios of 1.1 x 10^(-5) and 0.4x10^(-7) respectively and are mainly parity conserving.

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