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

Abstract

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.

8 pages with 2 eps figures

References in corpus (6)

• phi photo-production from Li, C, Al, and Cu nuclei at Egamma=1.5 - 2.4 GeV
• Phi-meson photoproduction from nuclei
• Kaon Pair Production in Proton--Proton Collisions
• Precision measurement of the quasi-free pn->dphi reaction close to threshold
• Near-threshold $\varphi$ meson production in proton-nucleus reactions and $\varphi$ width in finite nuclei
• A-dependence of phi-meson production in p+A collisions

Cited by in corpus (1)

• Near-threshold Photoproduction of Phi Mesons from Deuterium