title: In-medium effects on phase space distributions of antikaons measured in proton-nucleus collisions.
abstract: Differential production cross sections of K+/- mesons have been measured in p + C and p + Au collisions at 1.6, 2.5, and 3.5 GeV proton beam energy. At beam energies close to the production threshold, the K- multiplicity is strongly enhanced with respect to proton-proton collisions. According to microscopic transport calculations, this enhancement is caused by two effects: the strangeness exchange reaction NY --> K- NN and an attractive in-medium K- N potential at saturation density.
authors.affiliation: Forschungszentrum Rossendorf, D-01314 Dresden, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Scheinast
authors.forename: I
authors.initials: I
authors.lastname: Böttcher
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authors.lastname: Debowski
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authors.lastname: Dohrmann
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authors.lastname: Förster
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authors.lastname: Grosse
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authors.lastname: Koczoń
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authors.lastname: Kohlmeyer
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authors.lastname: Laue
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authors.lastname: Menzel
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authors.lastname: Naumann
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authors.lastname: Schwab
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authors.lastname: Senger
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authors.lastname: Shin
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authors.lastname: Ströbele
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authors.lastname: Sturm
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authors.lastname: Surówka
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authors.lastname: Uhlig
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authors.lastname: Wagner
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authors.lastname: Waluś
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authors.lastname: Kämpfer
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authors.initials: HW
authors.lastname: Barz