Second order QCD corrections to the nonleptonic decay of the $b$ quark in the slow charm limit

Details Second order QCD corrections to the nonleptonic decay of the $b$ quark in the slow charm limit Second order QCD corrections to the nonleptonic decay of the $b$ quark in the slow charm limit

1996-02-08

arxiv.org/abs/hep-ph/9602256v1

Int.J.Mod.Phys.A11:4931-4942,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 4 figures, all in standard LaTeX

Scientific paper

10.1142/S0217751X96002261

The perturbative QCD corrections to the nonleptonic decay rate of the $b$ quark are discussed. By considering the limit where the final charmed quarks are slow, it is argued that the coefficients of the $\alpha_s^2$ terms, corresponding to next-to-next-to-leading order in the standard renormalization group expansion in $\ln (m_W/m_b)$, are naturally large. The large coefficients arise from the final-state gluon exchange between quarks and are associated with the region of rather low momenta, which may further enhance the phenomenological significance of these terms.

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