# Helicity-dependent showers and matching with VINCIA

@inproceedings{Larkoski2013HelicitydependentSA, title={Helicity-dependent showers and matching with VINCIA}, author={Andrew J. Larkoski and Juan J. Lopez-Villarejo and Peter Skands}, year={2013} }

We present an antenna-shower formalism that includes helicity dependence for massless partons. The formalism applies to both traditional (global) showers and to 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…

## 29 Citations

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We present a complete set of helicity-dependent $$2\rightarrow 3$$2→3 antenna functions for QCD initial- and final-state radiation. The functions are implemented in the Vincia shower Monte Carlo…

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- Physics
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We propose a framework for high-energy interactions in which resonance decays and electroweak branching processes are interleaved with the QCD evolution in a single common sequence of decreasing…

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We present a first implementation of collinear electroweak radiation in the Vincia parton shower. Due to the chiral nature of the electroweak theory, explicit spin dependence in the shower algorithm…

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The first public implementation of antenna-based QCD initial- and final-state showers are presented, which capture not only the collinear dynamics but also the leading soft (coherent) singularities of QCD matrix elements.

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