Measurement of the in-medium [inline image]-meson width in proton-nucleus collisions

The production of [inline image] mesons in the collisions of 2.83 GeV protons with C, Cu, Ag, and Au at forward angles has been measured via the [inline image]-->K super(+)K super(-) decay using the COSY-ANKE magnetic spectrometer. The [inline image] meson production cross section follows a targe...

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Published inPhysics letters. B Vol. 695; no. 1-4; pp. 74 - 77
Main Authors Polyanskiy, A, Hartmann, M, Kiselev, YuT, Paryev, EYa, Buescher, M, Chiladze, D, Dymov, S, Dzyuba, A, Gebel, R, Hejny, V, Kaempfer, B, Keshelashvili, I, Koptev, V, Lorentz, B, Maeda, Y, Merzliakov, S, Mikirtytchiants, S, Nekipelov, M, Ohm, H, Schade, H
Format Journal Article
LanguageEnglish
Published 10.01.2011
Subjects
Collisions
Cross sections (physics)
Decay
Elementary particles
Gold
Mathematical models
Mesons
Silver
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Summary:The production of [inline image] mesons in the collisions of 2.83 GeV protons with C, Cu, Ag, and Au at forward angles has been measured via the [inline image]-->K super(+)K super(-) decay using the COSY-ANKE magnetic spectrometer. The [inline image] meson production cross section follows a target mass dependence of A super(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 [inline image] width is about an order of magnitude larger than its free value.
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ISSN:0370-2693
DOI:10.1016/j.physletb.2010.10.050