Mass shift and width broadening of -mesons produced in heavy ion collisions
V.L. Eletsky1,2 - B.L. Ioffe1 - J.I. Kapusta3
1 Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25,
Moscow 117218, Russia
2 Institut für Theoretische Physik III, Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
3 School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
Received: 28 July 1998 Communicated by F. Lenz
The mass shift and width broadening of -mesons produced in heavy ion collisions is estimated using general formulae which relate the in-medium mass shift of a particle to the real part of the forward scattering amplitude of this particle on constituents of the medium and to the corresponding cross section. It is found that the mass increases by some tens of MeV but, more importantly, the width becomes large, increasing by several hundred MeV at beam energies of a few GeVA and by twice that amount at beam energies of about a hundred GeVA.