Efficient color-dressed calculation of virtual corrections

Generalization of Dodgson's "Virtual Center" Method; an Efficient Method for Determinant Calculation

Charles Dodgson (1866) introduced a method to calculate matrices determinant, in asimple way. The method was highly attractive, however, if the sub-matrix or the mainmatrix determination is divided by zero, it would not provide the correct answer. Thispaper explains the Dodgson method's structure and provides a solution for the problemof "dividing by zero" called "virtua...

Real-time Animation of Dressed Virtual Humans

Cloth simulation has a long history, starting almost three decades ago. Thanks to the continuous increase of computation speed of computers, real-time simulation of clothes has become very recently possible. The research on real-time clothes has really begun few years ago when researchers have started simulating simple garments such as flags or tablecloths. Nowadays, the research aims at propos...

Resummation and Power Corrections by Dressed Gluon Exponentiation

Event-shape distributions in ee annihilation offer a unique laboratory for understanding perturbative and non-perturbative aspects of QCD. Dressed Gluon Exponentiation is a resummation method designed to evaluate differential cross sections close to a kinematic threshold and provide the basis for parametrization of power corrections. The method and its application in the case of the thrust and ...

Calculation of two - loop virtual corrections to b → s l + l − in the standard model ∗

Color-dressed recursive relations for multi-parton amplitudes

Remarkable progress inspired by twistors has lead to very simple analytic expressions and to new recursive relations for multi-parton color-ordered amplitudes. We show how such relations can be extended to include color and present the corresponding color-dressed formulation for the Berends-Giele, BCF and a new kind of CSW recursive relations. A detailed comparison of the numerical efficiency o...