Browsing by Subject "qcd"
Now showing items 1-3 of 3
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Constraints on higher-order perturbative corrections in b $\rightarrow$ u semileptonic decays from residual renormalization-scale dependence
(IOP Publishing, 2002-04-22)The constraint of a progressive decrease in residual renormalization scale dependence with increasing loop order is developed as a method for obtaining bounds on unknown higher-order perturbative corrections to ... -
Optimal renormalization-group improvement of the perturbative series for thee+e−annihilation cross section
(American Physical Society (APS), 2003-02-26)Using renormalization-group methods, we derive differential equations for the all-orders summation of logarithmic corrections to the QCD series for R(s)=sigma(e(+)e(-)-->hadrons)/sigma(e(+)e(-)-->mu(+)mu(-)), as ... -
Padé/renormalization-group improvement of inclusive semileptonic b decay rates
(Elsevier BV, 2003-02-01)Renormalization Group (RG) and optimized Pade-approximant methods are used to estimate the three-loop perturbative contributions to the inclusive semileptonic b --> u and b --> c decay rates. It is noted that the ...