Low mass dilepton production at ultrarelativistic energies

Abstract

Dilepton production in $pp$ and $Au+Au$ nucleus-nucleus collisions at $\sqrt{s}$ = 200 GeV as well as in $In+In$ and $Pb+Au$ at 158 A$\cdot$GeV is studied within the microscopic HSD transport approach. A comparison to the data from the PHENIX Collaboration at RHIC shows that standard in-medium effects of the $\rho ,\omega$ vector mesons - compatible with the NA60 data for $In+In$ at 158 A$\cdot$GeV and the CERES data for $Pb+Au$ at 158 A$\cdot$GeV - do not explain the large enhancement observed in the invariant mass regime from 0.2 to 0.5 GeV in $Au+Au$ collisions at $\sqrt{s}$ = 200 GeV relative to $pp$ collisions.

13 pages, 6 figures, extended version, Phys. Lett. B, in press

References in corpus (10)

• Dilepton production and off-shell transport dynamics at SIS energies
• Modification of the rho meson detected by low-mass electron-positron pairs in central Pb-Au collisions at 158 A GeV/c
• Study of dielectron production in C+C collisions at 1 AGeV
• Dilepton mass spectra in p+p collisions at sqrt(s)= 200 GeV and the contribution from open charm
• NA60 results on the rho spectral function in In-In collisions
• Low Mass Dimuons Produced in Relativistic Nuclear Collisions
• Enhancement of the dielectron continuum in sqrt{s_NN} = 200 GeV Au+Au collisions
• NA60 results on $p_T$ spectra and the $\rho$ spectral function in In-In collisions
• Theory and Phenomenology of Vector Mesons in Medium
• Intermediate mass dileptons in relativistic nuclear collisions

Cited by in corpus (1)

• NA60 results on thermal dimuons