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29 March 2024
 
  » arxiv » 1008.0232

 Article overview


Measurement of the in-medium phi-meson width in proton-nucleus collisions
A.Polyanskiy ; M.Hartmann ; Yu.T.Kiselev ; 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 ; S.Merzliakov ; S.Mikirtytchiants ; M.Nekipelov ; H.Ohm ; H.Schade ; V.Serdyuk ; A.Sibirtsev ; H.J.Stein ; H.Stroeher ; S.Trusov ; Yu.Valdau ; C.Wilkin ; P.Wuestner ;
Date 2 Aug 2010
AbstractThe 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.
Source arXiv, 1008.0232
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