Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 8: Hadronenstruktur und -spektroskopie

HK 8.7: Talk

Monday, March 19, 2012, 18:15–18:30, RW 1

proposal for a revisit of antiproton nucleus collision experiment with PANDA — •Yue Ma and Frank Maas — Helmholtz Institute Mainz

By the 1980s, a series of experiments have been performed around the world(CERN, KEK and BNL) to study the antiproton nucleus interaction. However, considerable ambiguities still exist regarding to the real part of antiproton nucleus potential. For example, elastic antiproton nucleus scattering shows a small attractive potential of 30 MeV while recent antiprotonic analysis favors a value of 110 MeV. Recently, a theoretical investigation based on GiBUU transportation model has been carried out, which demonstrates the possibility of the existence of an attractive potential about 150 MeV. Based on this result, the same group suggests the existence of a cold compressed phase of normal nucleus due to the attraction from a embedded antiproton. This talk will outline the motivation of a revisit of antiproton nucleus collision experiment with modern detector, PANDA, at FAIR facility. Extractions of interested physical variables will be illustrated and improvements compared with previous experiments will be emphasized.