Search
Now showing items 1-3 of 3
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 ...
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 ...