φ-meson production in In-In collisions at Elab=158A GeV: Evidence for relics of a thermal phase

被引：5

作者：

Santini, E. ^{[1
]}

Petersen, H. ^{[2
]}

Bleicher, M. ^{[3
]}

机构：

[1] Goethe Univ Frankfurt, Inst Theoret Phys, D-60438 Frankfurt, Germany

[2] Duke Univ, Dept Phys, Durham, NC 27708 USA

[3] FIAS, D-60438 Frankfurt, Germany

来源：

PHYSICS LETTERS B | 2010年 / 687卷 / 4-5期

关键词：

Monte Carlo simulations; Relativistic heavy-ion collisions; Particle and resonance production; HEAVY-ION COLLISIONS; RELATIVISTIC HYDRODYNAMICS; STRANGENESS; TRANSITION;

D O I：

10.1016/j.physletb.2010.02.085

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Yields and transverse mass distributions of the phi-mesons reconstructed in the phi -> mu(+)mu(-) channel in In+In collisions at E-lab = 158A GeV are calculated within an integrated Boltzmann+hydrodynamics hybrid approach based on the Ultrarelativistic Quantum Molecular Dynamics (UrQMD) transport model with an intermediate hydrodynamic stage. The analysis is performed for various centralities and a comparison with the corresponding NA60 data in the muon channel is presented. We find that the hybrid model, that embeds an intermediate locally equilibrated phase subsequently mapped into the transport dynamics according to thermal phase-space distributions, gives a good description of the experimental data, both in yield and slope. On the contrary, the pure transport model calculations tend to fail in catching the general properties of the phi meson production: not only the yield, but also the slope of the m(T) spectra, compare poorly with the experimental observations at top SPS energies. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：320 / 326

页数：7

共 17 条

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