Three-pion initial states in the dielectron production below rho(770)
|Prof. Ing. Peter Lichard, DrSc.
||Institute of Physics, Silesian University in Opava and IEAP CTU in Prague
PHENIX Collaboration at RHIC has recently observed a large excess of
the dielectron yield in the central gold-gold collisions and suggested that
it might come from a partonic phase. In order to confirm such an origin,
all possible hadronic sources have to be ruled out, including those ignored
so far. We calculate the dielectron rate resulting from the reactions with
three pions in the initial state and compare it to the standard two-pion annihilation rate. The three-pion rate strongly depends on the a1-rho-pi interaction Lagrangian and we discuss the ways how to resolve this ambiguity
using the recent results of the SLU/IEAP particle theory group.