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Delta resonance production in Ni-58 + Cu collisions at E = 1.97-A-GeV

Authors
  • Hjort, E.L.
  • Albergo, S.
  • Bieser, F.
  • Brady, F.P.
  • Caccia, Z.
  • Cebra, D.A.
  • Chacon, A.D.
  • Chance, J.L.
  • Choi, Y.
  • Costa, S.
  • Elliott, J.B.
  • Gilkes, M.L.
  • Hauger, J.A.
  • Hirsch, A.S.
  • Insolia, A.
  • Justice, M.
  • Keane, D.
  • Kintner, J.C.
  • Lisa, M.A.
  • Matis, H.S.
  • And 24 more
Publication Date
Jan 01, 1997
Identifiers
DOI: 10.1103/PhysRevLett.79.4345
OAI: oai:inspirehep.net:452723
Source
INSPIRE-HEP
Keywords
License
Unknown
External links

Abstract

Invariant mass analyses of (p,π±) pairs in 58Ni+Cu collisions at 1.97AGeV have been performed and show correlations resulting from the decays of the Δ resonance, the Λ baryon, and possibly the N*(1440) resonance. A reduction in the Δ mass is observed and the mass reduction increases with collision centrality. Events generated by the relativistic cascade model (ARC) also reveal a mass reduction. The mass reduction is related to the size of the reaction volume and the details of Δ production mechanisms in heavy ion collisions.

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