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19 April 2024

» arxiv » 1201.3517

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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 ;
Date:	17 Jan 2012
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.
Source:	arXiv, 1201.3517
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