Baryonic contributions to e(+)e(-) yields in a hydrodynamic model of Pb + Au collisions at the SPS

We analyze e(+)e(-) yields from matter containing baryons in addition to me sons using a hydrodynamic approach to describe Pb+Au collisions at 158 A Ge V/c. We use two distinctly different e(+)e(-) production rates to provide c ontrast. Although the presence of baryons leads to significant enhancement of e(+)e(-) emission relative to that from mesons-only matter, the calculat ed results fall below the data in the range 400 < Me+e-/MeV < 600. The calc ulated results are, however, only 1.3-1.5 standard deviations below the dat a, which may not be statistically significant.