A matching of matrix elements and parton showers

Abstract

We propose a simple scheme to start a parton-shower evolution description from a given jet configuration in $e^+ e^-$ annihilation events. This allows a convenient combination of the full angular information content of matrix elements with the detailed sub-jet structure of parton showers, and should give a realistic overall description of event properties. Explicit studies with this hybrid approach are presented for the four-jet case, as a simple testing ground of the ideas.

Figures (5)

• Figure 1: 4-parton histories to second order in $\alpha_{\mathrm{s}}$
• Figure 2: One 4-parton history
• Figure 3: Distributions of charged particle multiplicity
• Figure 4: Subjet multiplicities
• Figure 5: $|\mathrm{\cos}\theta^{\ast}_{\mathrm{NR}}|$ distributions