Realtime dynamics of hyperon spin correlations from string fragmentation in a deformed four-flavor Schwinger model

TL;DR

This paper explores hyperon spin correlations during string fragmentation using a four-flavor Schwinger model, providing insights into entanglement and spin dynamics in a simplified quantum field theory framework.

Contribution

It introduces a novel 1+1-dimensional model to study hyperon spin correlations, incorporating an effective spin-flip term in the Schwinger model.

Findings

Reveals how string configurations influence hyperon spin correlations.

Demonstrates the model's ability to simulate entanglement effects in hyperon production.

Provides a new theoretical approach to analyze hyperon spin dynamics.

Abstract

Self-polarizing weak decays of $\Lambda$-hyperons provide unique insight into the role of entanglement in the fragmentation of QCD strings through measurements of the spin correlations of $\Lambda{\bar \Lambda}$-pairs produced in collider experiments. The simplest quantum field theory representing the underlying parton dynamics is the four-flavor massive Schwinger model plus an effective spin-flip term, where the flavors are mapped to light (up/down) and heavy (strange) quarks and their spins. This construction provides a novel way to explore hyperon spin-correlations in 1+1-dimensions. We investigate the evolution of these correlations for different string configurations that are sensitive to the rich structure of the model Hamiltonian.