Helicity-dependent showers and matching with VINCIA

A. J. Larkoski, J. J. Lopez-Villarejo, P. Skands

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Abstract

We present an antenna shower formalism that includes helicity dependence for massless partons. The formalism applies to both traditional (global) showers and sector-based variants. We combine the shower with vincia's multiplicative approach to matrix-element matching, generalized to operate on each helicity configuration separately. The result is a substantial gain in computational speed for high parton multiplicities. We present an implementation of both sector and global showers, with min/max variations, and helicity-dependent tree-level matching applied through n≤4 for V/H→qq̄+n partons and through n≤5 for H→n gluons.

Original languageEnglish
Article number054033
JournalPhysical Review D
Volume87
Issue number5
DOIs
Publication statusPublished - 26 Mar 2013
Externally publishedYes

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