2007/02/01 by Jörg Ruppert, Jorg Ruppert, Thorsten Renk · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1088/0954-3899/34/8/s153
published as J.Phys.G34:S1047-S1050,2007 · Contributed to 19th International Conference on Ultrarelativistic Nucleus-Nucleus Collisions: Quark Matter 2006 (QM 2006), Shanghai, China, 14- 20 Nov 2006
arxiv created 2007/02/01 · openalex publication_date 2007/07/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Recently the NA60 collaboration has presented high precision measurements of dimuon spectra double differential in invariant mass M and transverse pair momentum p T in In–In collisions at 158 A GeV. While the M -dependence is important for an understanding of in-medium changes of light vector mesons and is p T integrated insensitive to collective expansion, the p T -dependence arises from an interplay between emission temperature and collective transverse flow. This fact can be exploited to derive constraints on the evolution model and in particular on the contributions of different phases of the evolution to dimuon radiation into a given M window. We present arguments that a thermalized evolution phase with T > 170 MeV leaves its imprint on the spectra.