> 'Low mass dimuons produced in relativistic nuclear collisions'
Low mass dimuons produced in relativistic nuclear collisions
Phys. Rev. Lett. 100, 162301
The NA60 experiment has measured low mass muon pair production in In-In collisions at 158A GeV with unprecedented precision. We show that these data are reproduced very well by a dynamical model with parameters scaled from fits to measurements of hadronic transverse mass spectra and Hanbury Brown–Twiss correlations in Pb-Pb and Pb-Au collisions at the same energy. The data are consistent with in-medium properties of rho and omega mesons at finite temperature and density as deduced from empirical forward-scattering amplitudes. Inclusion of the vacuum decay of the rho meson after freeze-out is necessary for an understanding of the mass and transverse momentum spectrum of dimuons with M<~0.9 GeV/c2.
Cite article as:
J. Kapusta, "Low mass dimuons produced in relativistic nuclear collisions", Phys. Rev. Lett. 100, 162301 (2008)