$\Lambda\bar{\Lambda}$ Production in Two-Photon Interactions at CLEO

TL;DR

This paper reports the first observation of two-photon production of Lambda-antiLambda pairs at CLEO, measuring the cross-section and comparing it with quark-diquark model predictions.

Contribution

It provides the first experimental measurement of gamma-gamma to Lambda-antiLambda production and compares it with theoretical models.

Findings

First observation of gamma-gamma to Lambda-antiLambda production.

Measured cross-sections as a function of center of mass energy.

Comparison with quark-diquark model predictions.

Abstract

Using the CLEO detector at the Cornell $e^+e^-$ storage ring, CESR, we study the two-photon production of $\Lambda \bar{\Lambda}$, making the first observation of $\gamma \gamma \to \Lambda \bar{\Lambda}$. We present the cross-section for $ \gamma \gamma \to \Lambda \bar{\Lambda}$ as a function of the $\gamma \gamma$ center of mass energy and compare it to that predicted by the quark-diquark model.