Abstract
In connection with the claim made at the Quark Matter 2005 Conference that the Brown-Rho scaling is ruled out by NA60 data we consider dimuon production from semicentral In+In collisions in a full dynamical model. It is shown that if only a modification of the density-dependent ρ mass is allowed, the maximum of dimuon invariant mass spectra is only slightly below experimental one. The additional inclusion of the temperature-dependent modification factor shifts the spectrum maximum toward lower invariant masses making calculation results incompatible with data. A further study is needed to disentangle the BR dropping ρ-mass scaling and strong broadening.
- Received 5 October 2005
DOI:https://doi.org/10.1103/PhysRevC.73.021902
©2006 American Physical Society