Momentum dependence of the phi-meson nuclear transparency
| Autor: | Hartmann, M., Kiselev, Yu. T., Polyanskiy, A., Paryev, E. Ya., Buescher, M., Chiladze, D., Dymov, S., Dzyuba, A., Gebel, R., Hejny, V., Kaempfer, B., Keshelashvili, I., Koptev, V., Lorentz, B., Maeda, Y., Magas, V. K., Merzliakov, S., Mikirtytchiants, S., Nekipelov, M., Ohm, H., Roca, L., Schade, H., Serdyuk, V., Sibirtsev, A., Sinitsyna, V. Y., Stein, H. J., Stroeher, H., Trusov, S., Valdau, Yu., Wilkin, C., Wuestner, P., Ye, Q. J. |
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| Rok vydání: | 2012 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevC.85.035206 |
| Popis: | 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. Comment: 9 pages, 5 figures |
| Databáze: | arXiv |
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