Katarzyna Szymanska

Design of a very thin target for hypernuclear production using antiprotons at FAIR

The future PANDA experiment is dedicated to hadron physics. In particular a new idea to produce doubly strange systems from Ξ− hyperons obtained from antiprotons is proposed. The developments of the hypernuclear as well as of the exotic hyperatom physics requires the production of statistically significant amounts of doubly strange Ξ− hyperons. The FAIR project will supply intense beam of antiprotons from the HESR ring. A target should be put inside the beam pipe and its features will play a crucial role in producing high rates of double hypernuclei. A new set-up with a novel idea for a hyperon production target, together with the results of some preliminary tests, will be described in this paper.

Perspectives of the Double Strangeness Physics at FAIR

The future complex FAIR (Facility for Antiproton and Ion Research) will allow to investigate a wide spectrum of physics items, ranging from QCD to the Nuclear Structure, from Astrophysics to Atomic Physics, from Plasma Physics to their applications. Among the other facilities the High Energy Storage Ring (HESR) will supply antiprotons in the momentum range from 1.5 to 15 GeV/c, with a resolution up to 10−5. The PANDA experiment, located inside HESR, will study the charm and strangeness physics, the form factor in the time like region and other topics like the crossed channel Compton scattering. The idea of studying the strangeness using antiprotons is new and the investigations will be focused onto the doubly strange systems, whose physics aspects are here shortly reviewed. The production technique will be illustrated and the expected performances, in terms of statistically significant amount of data, presented.

MESON PRODUCTION IN AN EFFECTIVE RELATIVISTIC MEAN FIELD MODEL

We study the meson yield ratios for high energy central nucleus-nucleus collisions by means of an effective relativistic mean-field model with the inclusion of the full octet of baryons, the Δ-isobars degrees of freedom and the lightest pseudoscalar and vector mesons. These last particles are considered in the so-called one-body contribution, taking into account of an effective chemical potential depending on the self-consistent interaction between baryons. The analysis is performed by requiring the global conservation of baryon number, electric charge fraction and zero net strangeness.

Doubly Strange Hypernuclei Physics with antiprotons at PANDA

The study of the double hypernuclei will be possible inside the future facility FAIR. A new technique for their production was recently proposed, based on high intensity antiproton beams in connection with a two‐target set‐up, for the future PANDA experiment at HESR. In particular, the production technique and optimized parameters for the primary target where the hyperon Ξ− is produced as well as the expected rates for the stoped Ξ− will be discussed.