Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 31: Struktur und Dynamik von Kernen
HK 31.5: Vortrag
Mittwoch, 19. März 2014, 18:00–18:15, HZ 4
Studying the potential of antihyperons in nuclei with antiprotons — •Alicia Sanchez Lorente1, Sebastian Bleser1, Josef Pochodzalla2, and Marcell Steinen1 for the PANDA collaboration — 1Helmholtz-Institut Mainz — 2Institute for nuclear physics, JGU Mainz
The interaction between an antibaryon and a nucleus may shed light on the short range antibaryon-baryon force in a unique way. However, because of the deep imaginary part of the nuclear potential of antibaryons, the physics of antihyperons in nuclei is hitherto an uncharted territory. Recently it was proposed to use transverse momentum correlations of exclusively produced antihyperon-hyperon pairs in antiproton-nucleus collisions to obtain information on the antihyperon potentials relative to that of the corresponding hyperon[1]. In the present study we use the Giessen Boltzmann-Uehling- Uhlenbeck Transportmodell (GiBUU) to explore the production of exclusive hyperon-antihyperon pairs close to threshold. Unlike the schematic calculation of ref.[1], these GiBBU simulations take e.g. important rescattering effects into account. In case of p+20Ne→ΛΛ+X we confirm a significant sensitivity of transverse momentum correlations to the nuclear potential of Λs. We also explore the feasibility of such measurements at the PANDA experiment of the international facility FAIR.
[1] J. Pochodzalla, Phys. Lett. B 669, 306-310 (2008)