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28 March 2024
 
  » arxiv » nucl-ex/0202021

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Evidence of kaon nuclear and Coulomb potential effects on soft K+ production from nuclei
M.Nekipelov ; M.Buescher ; W.Cassing ; M.Hartmann ; V.Hejny ; V.Kleber ; H.R.Koch ; V.Koptev ; Y.Maeda ; R.Maier ; S.Merzliakov ; S.Mikirtychiants ; H.Ohm ; A.Petrus ; D.Prasuhn ; F.Rathmann ; Z.Rudy ; R.Schleichert ; H.Schneider ; K.Sistemich ; H.J.Stein ; H.Stroeher ; K.-H.Watzlawik ; C.Wilkin ;
Date 26 Feb 2002
Journal Phys.Lett. B540 (2002) 207-212
Subject nucl-ex
AbstractThe ratio of forward K+ production on copper, silver and gold targets to that on carbon has been measured at proton beam energies between 1.5 and 2.3 GeV as a function of the kaon momentum p_K using the ANKE spectrometer at COSY-Juelich. The strong suppression in the ratios observed for p_K<200-250 MeV/c can be ascribed to a combination of Coulomb and nuclear repulsion in the K+A system. This opens a new way to investigate the interaction of K+-mesons in the nuclear medium. Our data are consistent with a K+A nuclear potential of V_K~20 MeV at low kaon momenta and normal nuclear density. Given the sensitivity of the data to the kaon potential, the current experimental precision might allow one to determine V_K to better than 3 MeV.
Source arXiv, nucl-ex/0202021
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