Low Mass Dimuons Produced in Relativistic Nuclear Collisions
High Energy Physics - Phenomenology
2008-11-26 v3
Abstract
The NA60 experiment has measured low-mass muon pair production in In-In collisions at 158 A GeV with unprecedented precision. We show that this data is reproduced very well by a dynamical model with parameters scaled from fits to measurements of hadronic transverse mass spectra and Hanbury-Brown and Twiss correlations in Pb-Pb and Pb-Au collisions at the same energy. The data is consistent with in-medium properties of and -mesons at finite temperature and density as deduced from empirical forward-scattering amplitudes. Inclusion of the vacuum decay of the -meson after freeze-out is necessary for an understanding of the mass and transverse momentum spectrum of dimuons with .
Cite
@article{arxiv.0706.1934,
title = {Low Mass Dimuons Produced in Relativistic Nuclear Collisions},
author = {Jorg Ruppert and Charles Gale and Thorsten Renk and Peter Lichard and Joseph I. Kapusta},
journal= {arXiv preprint arXiv:0706.1934},
year = {2008}
}