Phi meson production in In-In collisions at $E_{\mathrm{lab}}$=158$A$ GeV: evidence for relics of a thermal phase

Abstract

Yields and transverse mass distributions of the $\varphi$-mesons reconstructed in the $\varphi \to {\mu }^{+}{\mu }^{-}$ channel in In+In collisions at $E_{\mathrm{lab}}$=158$A$ 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 $\varphi$ meson production: not only the yield, but also the slope of the $m_T$ spectra, very poorly compare with the experimental observations.

References in corpus (18)

• Fully integrated transport approach to heavy ion reactions with an intermediate hydrodynamic stage
• Transport Coefficients of Hadronic Matter near $T_c$
• Shear-Viscosity to Entropy Density Ratio of a Relativistic Hadron Gas
• Energy dependence of phi meson production in central Pb+Pb collisions at sqrt(s_nn) = 6 to 17 GeV
• Mass ordering of differential elliptic flow and its violation for phi mesons
• Shear viscosity of a hadronic gas mixture
• (3+1)-Dimensional Hydrodynamic Expansion with a Critical Point from Realistic Initial Conditions
• Viscosity in the excluded volume hadron gas model
• Effects of a phase transition on HBT correlations in an integrated Boltzmann+Hydrodynamics approach
• Ideal hydrodynamics and elliptic flow at SPS energies: Importance of the initial conditions
• Production and evolution path of dileptons at HADES energies
• $<m_T>$ excitation function: Freeze-out and equation of state dependence
• $\varphi$ Production in In-In Collisions at 158 AGeV
• How Sensitive are Di-Leptons from Rho Mesons to the High Baryon Density Region?
• Centrality and system size dependence of (multi-strange) hyperons at 40$A$ and 158$A$ GeV: A comparison between a binary collision and a Boltzmann + hydrodynamic hybrid model
• Medium effects on phi decays to dilepton and kaon-antikaon pairs in relativistic heavy ion reactions
• The phi meson at high temperatures and densities
• A transport calculation with an embedded (3+1)d hydrodynamic evolution: Elliptic flow as a function of transverse momentum at SPS energies

Cited by in corpus (3)

• Dilepton production and resonance properties within a new hadronic transport approach in the context of the GSI-HADES experimental data
• Dimuon radiation at the CERN SPS within a (3+1)d hydrodynamic+cascade model
• Low mass dimuons within a hybrid approach