Probing the ρ spectral function in hot and dense nuclear matter by dileptons

被引：82

作者：

Cassing, W ^{[1
]}

Bratkovskaya, EL

Rapp, R

Wambach, J

机构：

[1] Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany

[2] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[3] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

来源：

PHYSICAL REVIEW C | 1998年 / 57卷 / 02期

关键词：

D O I：

10.1103/PhysRevC.57.916

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present a dynamical study e(+)e(-) and mu(+)mu(-) production in proton-nucleus and nucleus-nucleus collisions at CERN-SPS energies on the basis of the covariant transport approach HSD employing a momentum-dependent rho-meson spectral function that includes the pion modifications ill tilt nuclear medium as well as the polarization of the rho meson due to resonant rho-N scattering. We find that the experimental data from the CERES and HELIOS-3 Collaborations can be described equally well as within the dropping rho-mass scenario. Whereas corresponding dilepton q(T) spectra are found to be very similar, the inclusive dilepton yield in the invariant mass range 0.85 less than or equal to M less than or equal to 1.0 GeV should allow us to disentangle the two scenarios experimentally.

引用

页码：916 / 921

页数：6

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