M.R. Ahmady

Closed form summation of RG accessible logarithmic contributions to semileptonic B decays and other perturbative processes

For any perturbative series that is known to

Constraints on the minimal supergravity parameter space from NLO calculation of isospin asymmetry in B -> K*γ

k

Diffractive

-subleading orders of perturbation theory, we utilise the process-appropriate renormalization-group (RG) equation in order to obtain all-orders summation of series terms proportional to

\rho

\alpha^n \log^{n-k}(\mu^2)

and

with

\phi

k = {0,1,2,3}

production at HERA using a holographic AdS/QCD light-front meson wave function

, corresponding to the summation to all orders of the leading and subsequent-three-subleading logarithmic contributions to the full perturbative series. These methods are applied to the perturbative series for semileptonic

Predicting the

b

B \to K^*

-decays in both MS-bar and pole-mass schemes, and they result in RG-summed series for the decay rates which exhibit greatly reduced sensitivity to the renormalization scale

form factors in light-cone QCD

\mu