Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Hadronenstruktur und -spektroskopie

HK 60.4: Vortrag

Freitag, 21. März 2014, 15:00–15:15, HZ 3

Correlation studies in the low energetic p(T=3.5 GeV) + Nb system — •Oliver Arnold for the HADES collaboration — Technische Universität München, Garching, Germany

In astrophysics, a technique was developed to determine the source size of stellar objects with a measurement of the correlation between photons which were emitted from this object. This HBT formalism named after their inventors Hanbury-Brown and Twiss was independently discovered in nuclear physics by Goldhaber et al. who measured an angular correlation for like-sign pion pairs. This discovery was the starting point to use the HBT technique in nuclear physics e.g. in the field of heavy ion physics to gain information about the excited matter state of large temperature and density created during the collision of the ions by measuring final state interactions of the produced particles.

We use the HBT technique to measure the correlation between protons which were produced in proton-niobium collisions and detected with HADES at a proton beam kinetic energy of 3.5 GeV. We compare the experimental correlation function with theoretical predictions from the Koonin model to extract the region of homogeneity. It also allows us to confront transport model simulations (UrQMD) with the HADES data to learn more about the emission dynamics of protons.

This work was supported by the Helmholtz fonds VH-NG-330 and the Excellence Cluster "Universe".