Unstable-particles pair production in MPTapproach in NNLO

Abstract

We consider pair production and decay of fundamental unstable particles in the framework of a modified perturbation theory treating resonant contributions in the sense of distributions. Outcomes of a numerical simulation up to the NNLO with taking into account universal massless-particles contributions are presented.

Comments: 3 pages, 1 figure, Talk given at 14th Lomonosov Conference on Elementary Particle Physics, Moscow, August 19-25, 2009