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Study of Chiral Symmetry Restoration through Di-lepton Enhancement at RHIC and Beyond

This study investigates the restoration of Chiral Symmetry through di-lepton enhancement in high-energy collisions. By analyzing the spectral functions and baryon densities at various energy levels, models incorporating vector-meson functions and Quark-Gluon Plasma radiation are tested. Precise di-lepton measurements at RHIC, LHC, and FAIR can provide insights into the dissolution of vector mesons and the presence of thermal radiation. An upgrade to RHIC is needed for high-luminosity runs to address fundamental questions in QCD.

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Study of Chiral Symmetry Restoration through Di-lepton Enhancement at RHIC and Beyond

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  1. A tool to study Chiral Symmetry Restoration • Abroadened spectral function describes di-lepton enhancement from SPS at 17.3 GeV to top RHIC energy from STAR. • The total baryon density does not change significantly from 17.3 to 200 GeV. This provides robust test for models incorporating vector-meson spectral function with smooth connection to QGP radiation. • With precise spectrum and v2 measurements over a broad beam energy range, di-leptons can test if vector mesons completely dissolve and if thermal radiation exists at the same mass range (qqbarl+l-). • Precise di-lepton measurements over a broad beam energy scan at RHIC, LHC and FAIR provides a unique opportunity to study Chiral Symmetry Restoration. • Need RHIC upgrade BES-II high luminosity run to study one of the two fundamental issues in QCD (Quark confinement and Chiral symmetry Restoration) NA60, Eur.Phys.J.C59(2009)607 Lijuan Ruan, Rapporteur talk, QM2012 STAR: Cui, Dong, Geurts, Huang, Huck; PHENIX: Tserruya

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