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

Polyanskiy, A.; Hartmann, M.; Kiselev, Yu. T.; Paryev, E. Ya.; Büscher, M.; Chiladze, D.; Dymov, S.; Dzyuba, A.; Gebel, R.; Hejny, V.; Kämpfer, B.; Keshelashvili, I.; Koptev, V.; Lorentz, B.; Maeda, Y.; Merzliakov, S.; Mikirtytchiant, S.; Nekipelov, M.; Ohm, H.; Schade, H.; Serdyuk, V.; Sibirtsev, A.; Stein, H. J.; Ströher, H.; Trusov, S.; Valdau, Yu.; Wilkin, C.; Wüstner, P.

doi:10.1016/j.physletb.2010.10.050

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

Polyanskiy, A.; Hartmann, M.; Kiselev, Y. T.; Paryev, E. Y.; Büscher, M.; Chiladze, D.; Dymov, S.; Dzyuba, A.; Gebel, R.; Hejny, V.; Kämpfer, B.; Keshelashvili, I.; Koptev, V.; Lorentz, B.; Maeda, Y.; Merzliakov, S.; Mikirtytchiant, S.; Nekipelov, M.; Ohm, H.; Schade, H.; Serdyuk, V.; Sibirtsev, A.; Stein, H. J.; Ströher, H.; Trusov, S.; Valdau, Y.; Wilkin, C.; Wüstner, P.

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±0.03 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.

Physics Letters B 695(2011), 74
DOI: 10.1016/j.physletb.2010.10.050
Cited 64 times in Scopus

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