Weak Radiative Decay Lambdab to Lambda gamma and Quark-Confined Effects in the Covariant Oscillator Quark Model
Rukmani Mohanta, Anjan K. Giri, Mohinder P. Khanna, Muneyuki Ishida, Shin Ishida
Abstract
Motivated by the observation of the decay B to K* gamma by the CLEO collaboration, we have systematically analyzed the weak radiative decay Lambdab to Lambda gamma, evaluating the confined effects of quarks in the covariant oscillator quark model. This decay process receives both short distance (electromagnetic penguins at the one loop level) the long distance contributions in the quark level. The long distance contributions are analyzed using the vector meson dominance (VMD) method. The estimated branching ratio is found to be 0.23 times 10-5.
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