Low energy interaction studies of negative kaons in light nuclear targets by AMADEUS

Abstract

The AMADEUS collaboration is performing experimental investigations in the sector of the low energy strangeness hadron physics by taking advantage of the DAΦNE collider, which provides a unique source of monochromatic low-momentum kaons and exploiting the KLOE detector as an active target. The K⁻ single and multi-nuclear absorption on H, ⁴He, ⁹Be and ¹²C, both at-rest and in-flight, are studied with the aim to determine the nature of the controversial Λ(1405), the non-resonant hyperon pion formation amplitude below the K̅N threshold, the yield and cross sections of K⁻ multi-nucleon absorptions intimately connected to the antikaon multi-nucleon clusters properties and the K⁻ scattering cross sections on light nuclear targets. These studies have a strong impact on the non-perturbative strangeness QCD with implications ranging from nuclear physics to the equation of state of neutron stars.