Bonn 2010 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 50: Schwerionenkollisionen und QCD Phasen V

HK 50.9: Vortrag

Donnerstag, 18. März 2010, 18:30–18:45, HG I

φ meson production at 2A GeV in FOPI — •Krzysztof Piasecki — Physikalisches Institut, Universität Heidelberg, Germany — Institute of Experimental Physics, Univ. of Warsaw, Poland

φ mesons are the rare probes of Heavy Ion collisions at 1-2A GeV. Investigation of their production [1] may help understanding the equilibration mechanism and shed light on elementary processes during the collision. As the Phi-meson lifetime is cτφ = 50 fm, the φ → K+ K decay channel can substantially obfuscate the signatures of in-medium kaon interactions.

A better insight into phase space of φ mesons is currently possible thanks to the recent installation of the Multi-strip Multi-gap Resistice Plate Chamber (MMRPC) detector in the FOPI spectrometer, resulting in an improvement of the timing resolution of the system to σToF < 100 ps [2].

φ mesons from various systems and collision centralities investigated by the FOPI collaboration will be reviewed.

This work is supported in part by BMBF 06HD190I and EU/FP7 WP2.

[1] A. Mangiarotti et al., Nucl. Phys. A 714, 89 (2003)

[2] A. Schüttauf et al., Nucl. Instr. Meth. A 602, 679 (2009)

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