A direct probe of $\Lambda$ potential in nuclear medium

Abstract

Using the Liège intranuclear-cascade model together with the ablation model ABLA, an investigation is conducted into the effects of $\Lambda$ potential in $\Lambda$-nucleus and $\Lambda$-hypernucleus-nucleus collisions across various beam energies. The findings show that the angle and transverse-momentum distributions of scattered $\Lambda$ hyperon, the scattering cross section of the $\Lambda$ hyperon in $\Lambda$-nucleus collisions as well as the rapidity distribution of $\Lambda$ hyperon in $\Lambda$-hypernucleus-nucleus collisions are significantly influenced by the strength of the $\Lambda$ potential in these scattering reactions across various beam energies. These demonstrations, unhindered by the uncertainties of $\Lambda$ and hypernuclei productions in nuclear medium, allow for a direct investigation of the $\Lambda$ potential, especially its momentum dependence. The criticality of probing the $\Lambda$ potential is closely associated with the resolution of the "hyperon puzzle" in neutron stars.

5 pages, 4 figures. Feasibility literature with experiments added. PLB in production

References in corpus (6)

• Hyperon Puzzle: Hints from Quantum Monte Carlo Calculations
• Extension of the Liège Intranuclear-Cascade model to reactions induced by light nuclei
• Large-mass neutron stars with hyperonization
• Equations of state for hot neutron stars -- II. The role of exotic particle degrees of freedom
• Cooling of hypernuclear compact stars: Hartree-Fock models and high-density pairing
• Constraint of the Nuclear Dissipation Coefficient in Fission of Hypernuclei