Colour-straight four-quark operators and liftemes of beautiful hadrons
S. Arunagiri
Abstract
Using the relation between the harmonic oscillator wave function and the light quark scattering form factor, the expectation values of colour-straight four-quark operators are evaluated and found to be directly proportional to the cubic power of the oscillator strength. It is predicted that the ratio τ(Λb)/τ(B) ≈ 0.79(0.84) due to the factorizable (nonfactorisable) piece, against the experimental 0.79 0.06. Notwithstanding the numerical prediction, the present study shows that the four-quark operators play a role as far the lifetimes of b-flavoured hadrons are concerned.
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