correlations in reactions
II. Physikalisches Institut, University of Gießen, Germany
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Preliminary differential cross-sections of the reactions and with A = 1 H, 12 C, and nat Pb are presented. A significant nuclear-mass dependence of the invariant-mass distribution is found in the channel. The dependence is not observed in the channel. The in-medium observation in the channel is consistent with an in-medium modification of the interaction in the I = J = 0 channel, changing width and pole position of a resonant state.
© Società Italiana di Fisica and Springer-Verlag, 2003