Measurement of the in-medium phi-meson width in proton-nucleus collisions

Details Measurement of the in-medium phi-meson width in proton-nucleus collisions Measurement of the in-medium phi-meson width in proton-nucleus collisions

2010-08-02

arxiv.org/abs/1008.0232v1

Phys.Lett.B695:74-77,2011

Physics

Nuclear Physics

Nuclear Experiment

8 pages with 2 eps figures

Scientific paper

10.1016/j.physletb.2010.10.050

The production of phi mesons in the collisions of 2.83 GeV protons with C, Cu, Ag, and Au at forward angles has been measured via the phi -> K+K- decay using the COSY-ANKE magnetic spectrometer. The phi meson production cross section follows a target mass dependence of A^0.56+/-0.02 in the momentum region of 0.6-1.6 GeV/c. The comparison of the data with model calculations suggests that the in-medium phi width is about an order of magnitude larger than its free value.

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