In-medium modification of the Delta(1232) resonance at SIS energies

Details In-medium modification of the Delta(1232) resonance at SIS energies In-medium modification of the Delta(1232) resonance at SIS energies

1999-02-12

arxiv.org/abs/nucl-ex/9902006v1

Physics

Nuclear Physics

Nuclear Experiment

9 pages, LaTeX, 4 figures, 1 table, Talk presented at the 15th Winter Workshop on Nuclear Dynamics Park City, Utah

Scientific paper

From the pion production rates n_{pi} / A_{part} and the pion charge ratios R_{pi} = n_{pi^-} / n_{pi^+} and S_{pi} = n_{pi^0} / (n_{pi^-} + n_{pi^+}), measured in p + A and A + A reactions, it is concluded that the mass of the Delta(1232) resonance is reduced in dense nuclear matter. This conclusion is supported by the Delta(1232) mass distribution extracted from correlated (p,pi^{+-}) pairs and the pi^{+-} transverse momentum distributions.

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