Low-mass dileptons and dropping rho meson mass

Using the transport model, we have studied dilepton production from heavy-i on collisions at Bevalac energies. It is found that the enhanced production of low-mass dileptons observed in the experiment by the DLS collaboration cannot be explained by the dropping of hadron masses, in particular the p-m eson mass, in dense matter. (C) 1999 Elsevier Science B.V. All rights reser ved.