2007/01/30 by Kevin Dusling, Ismail Zahed, Ismaïl Zahed
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevc.80.014902
published as Phys.Rev.C80:014902,2009 · 10 pages, 5 figures
arxiv created 2007/01/30 · openalex publication_date 2009/07/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Recently the NA60 Collaboration has reported the transverse mass spectra of dimuons coming from In-In collisions at 158 GeV/nucleon. The measured yields display a strong invariant mass dependence not typical of radial flow, suggesting that different sources contribute in different mass regions. We interpret the dimuon transverse mass spectra from an early thermalized partonic phase and hadronic phase constrained by the strictures of broken chiral symmetry. Each phase develops a specific transverse momentum dependence by hydrodynamical expansion. We show that a measurement of the momentum anisotropy at NA60 could provide information on the dominant emission source (hadronic or partonic) in the intermediate mass region 1.5\ensuremath\leqslantM\ensuremath\leqslant3.0 GeV.