Weak Radiative Decay b -> and Quark-Confined Effects in the Covariant Oscillator Quark Model | Zendy

Rukmani Mohanta | Zendy; A K Giri | Zendy; M. P. Khanna | Zendy; Muneyuki Ishida | Zendy; S. Ishida | Zendy

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Weak Radiative Decay b -> and Quark-Confined Effects in the Covariant Oscillator Quark Model

Author(s) -

Rukmani Mohanta,

A K Giri,

M. P. Khanna,

Muneyuki Ishida,

S. Ishida

Publication year - 1999

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.102.645

Subject(s) - physics , particle physics , quark , vector meson dominance , radiative transfer , quark model , covariant transformation , branching fraction , nuclear physics , meson , bottom quark , b meson , quantum electrodynamics , top quark , quarkonium , quantum mechanics

Motivated by the observation of the decay B to K* gamma by the CLEOcollaboration, we have systematically analyzed the weak radiative decayLambda_b to Lambda gamma, evaluating the confined effects of quarks in thecovariant oscillator quark model. This decay process receives both shortdistance (electromagnetic penguins at the one loop level) the long distancecontributions in the quark level. The long distance contributions are analyzedusing the vector meson dominance (VMD) method. The estimated branching ratio isfound to be 0.23 times 10^-5.Comment: 8 pages, uses ptptex.st

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