TY  - JOUR
A1  - Santini, Elvira
A1  - Petersen, Hannah
A1  - Bleicher, Marcus
T1  - ϕ-meson production in In–In collisions at Elab=158A GeV: Evidence for relics of a thermal phase
T2  - Physics Letters B
N2  - Yields and transverse mass distributions of the ϕ-mesons reconstructed in the ϕ→μ+μ− channel in In+In collisions at Elab=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 ϕ meson production: not only the yield, but also the slope of the mT spectra, compare poorly with the experimental observations at top SPS energies.
KW  - Monte Carlo simulations
KW  - Relativistic heavy-ion collisions
KW  - Particle and resonance production
Y1  - 2010
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76488
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-764886
SN  - 0370-2693
VL  - 687
IS  - 4
SP  - 320
EP  - 326
PB  - Elsevier
CY  - Amsterdam
ER  -