Exploring the neutron skin by hyperon-antihyperon production in antiproton-nucleus interactions

Abstract

In this work we propose a new method to measure the evolution of the neutron skin thickness between different isotopes. We consider antiproton-nucleus interactions close to the production threshold of $\Lambda \overline{\Lambda }$ and $\Sigma \overline{\Lambda }$ pairs. At low energies, $\Lambda \overline{\Lambda }$ pairs are produced in p + p collisions, while $\Sigma \overline{\Lambda }$ pairs can only be produced in p + n interactions. Measuring these cross sections provides information on the neutron skin thickness

Comments: 4 pages, 3 figures, 14th International Conference on Hypernuclear and Strange Particle Physics - HYP2022