Parton showers with quantum interference: leading color, with spin

TL;DR

This paper extends a parton shower model to include quantum interference effects with spin correlations, building on previous work that incorporated color interference and leading color approximation.

Contribution

It proposes a strategy to incorporate spin-induced correlations into a previously developed quantum interference-aware parton shower model.

Findings

Framework for including spin correlations in parton showers.

Extension of previous models to account for spin effects.

Potential for more accurate simulations of particle collisions.

Abstract

We have previously described a mathematical formulation for a parton shower based on the approximation of strongly ordered virtualities of successive parton splittings. Quantum interference, including interference among different color and spin states, was included. A practical numerical implementation strategy was left unspecified. In a subsequent paper, we showed that if we add the further approximations of taking only the leading color limit and averaging over spins, we obtain a shower evolution that can be implemented as a Markov process. In this paper, we outline a strategy for including the correlations induced by parton spins.