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Antibaryon production in sulphur-nucleus collisions at 200 GeV per nucleon
Ist Teil von
Physics letters. B, 1996-01, Vol.366 (1), p.56-62
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
1996
Quelle
Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)
Beschreibungen/Notizen
Antiproton production near midrapidity has been studied in central collisions of
32S with sulphur, silver and gold nuclei at 200 GeV per nucleon. The measured transverse mass distributions can be described by an exponential with inverse slope parameters of about 200 MeV, similar to those obtained from
Λ
spectra. The rapidity density increases weakly with the target mass, ranging from 0.4 to 0.7. The ratio
Λ
p
near midrapidity is approximately 1.4 on average, significantly larger than the corresponding ratio observed in proton-proton and proton-nucleus collisions.