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

E. L. Hjort, S. Albergo, F. Bieser, F. P. Brady, Z. Caccia, D. A. Cebra, A. D. Chacon, J. L. Chance, Y. Choi, S. Costa, J. B. Elliott, M. L. Gilkes, J. A. Hauger, A. S. Hirsch, A. Insolia, M. Justice, D. Keane, J. C. Kintner, M. A. Lisa, H. S. MatisM. McMahan, C. McParland, D. L. Olson, M. D. Partlan, N. T. Porile, R. Potenza, G. Rai, J. Rasmussen, H. G. Ritter, J. Romanski, J. L. Romero, G. V. Russo, R. P. Scharenberg, A. Scott, Y. Shao, B. K. Srivastava, T. J.M. Symons, M. Tincknell, C. Tuvè, S. Wang, P. G. Warren, H. H. Wieman, T. Wienold, K. Wolf

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41 Scopus citations

Abstract

Invariant mass analyses of (p, π±) pairs in 58Ni + Cu collisions at 1.97A GeV have been performed and show correlations resulting from the decays of the Δ resonance, the Δ 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.

Original languageEnglish (US)
Pages (from-to)4345-4348
Number of pages4
JournalPhysical Review Letters
Volume79
Issue number22
DOIs
StatePublished - Jan 1 1997
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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., ... Wolf, K. (1997). Δ resonance production in 58Ni + Cu collisions at E = 1.97A GeV. Physical Review Letters, 79(22), 4345-4348. https://doi.org/10.1103/PhysRevLett.79.4345