Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 47: Heavy Ion Collisions and QCD Phases X

HK 47.7: Talk

Thursday, March 30, 2017, 18:30–18:45, F 1

Exit flow, enter femto — •Ante Bilandzic for the ALICE collaboration — Technical University of Munich, James-Franck-Str. 1, 85748 Garching, Germany

Neutron stars are the densest stars observed in the Universe. Their mass can be as large as 2 solar masses while their radius is only about 10-15 km. Recent observations of these massive neutron stars are proving to be a serious challenge for our understanding of their fundamental properties, most notably of their chemical content. A neutron star composed only of neutrons cannot match the experimental data, instead the other particle species are nowadays suggested by the theorists to model the content of a neutron star. One popular candidate are hyperons.

The onset of hyperons in the core of neutron star have dramatic effect on its equation of state. The nature of both the two-body hyperon-nucleon and the three-body hyperon-nucleon-nucleon interactions are at the moment poorly understood by the theorists mostly due to lack of experimental constraints for the parameters entering the theoretical models. It was only recently argued that a strong repulsive interaction of hyperons with nucleons via three-body force could yield to equation of state of a neutron star which is stiff enough to support the recent experimental data.

In this talk with present the status of multiparticle correlation techniques for the study of genuine three-body interactions between hyperons and nucleons, in the context of multiparticle femtoscopic techniques utilized for the analysis of elementary collisions in ALICE.