Momentum dependence of the phi-meson nuclear transparency

M. Hartmann; Yu. T. Kiselev; A. Polyanskiy; E. Ya. Paryev; M. Buescher; D. Chiladze; S. Dymov; A. Dzyuba; R. Gebel; V. Hejny; B. Kaempfer; I. Keshelashvili; V. Koptev; B. Lorentz; Y. Maeda; V. K. Magas; S. Merzliakov; S. Mikirtytchiants; M. Nekipelov; H. Ohm; L. Roca; H. Schade; V. Serdyuk; A. Sibirtsev; V. Y. Sinitsyna; H. J. Stein; H. Stroeher; S. Trusov; Yu. Valdau; C. Wilkin; P. Wuestner; Q. J. Ye

doi:10.1103/physrevc.85.035206

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arXiv · 1201.3517

Momentum dependence of the phi-meson nuclear transparency

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Abstract

The production of phi mesons in proton collisions with C, Cu, Ag, and Au targets has been studied via the phi -> K+K- decay at an incident beam energy of 2.83 GeV using the ANKE detector system at COSY. For the first time, the momentum dependence of the nuclear transparency ratio, the in-medium phi width, and the differential cross section for phi meson production at forward angles have been determined for these targets over the momentum range of 0.6 - 1.6 GeV/c. There are indications of a significant momentum dependence in the value of the extracted phi width, which corresponds to an effective phi-N absorption cross section in the range of 14 - 21 mb.

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M. Hartmann, Yu. T. Kiselev, A. Polyanskiy, E. Ya. Paryev, M. Buescher, D. Chiladze, S. Dymov, A. Dzyuba, R. Gebel, V. Hejny, B. Kaempfer, I. Keshelashvili, V. Koptev, B. Lorentz, Y. Maeda, V. K. Magas, S. Merzliakov, S. Mikirtytchiants, M. Nekipelov, H. Ohm, L. Roca, H. Schade, V. Serdyuk, A. Sibirtsev, V. Y. Sinitsyna, H. J. Stein, H. Stroeher, S. Trusov, Yu. Valdau, C. Wilkin, P. Wuestner, Q. J. Ye. 2012-01-17. Momentum dependence of the phi-meson nuclear transparency. https://doi.org/10.1103/physrevc.85.035206

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