Multi-parton Cross Sections at Hadron Colliders
Abstract
We present an alternative method to calculate cross sections for multi-parton scattering processes in the Standard Model at leading order. The helicity amplitudes are computed using recursion relations in the number of particles, which are based on Dyson-Schwinger equations. The summation over colour and helicity configurations are performed by Monte Carlo methods. The computational cost of this algorithm grows asymptotically as 3^n, where n is the number of particles involved in the process, compared to the n!-growth of the more traditional approaches. Results are cross checked with the explicit summation over all colour structures. Typical results for total cross section, differential distributions of the invariant masses, transverse momenta and rapidities of partons are presented. Finally the leading colour approximation and the special helicities approximation have been tested against the exact results.Keywords
All Related Versions
This publication has 0 references indexed in Scilit: