$K^{\ast }$ vector meson resonances dynamics in heavy-ion collisions

Abstract

We study the strange vector meson ($K^{\ast },{\bar{K}}^{\ast }$) dynamics in relativistic heavy-ion collisions based on the microscopic Parton-Hadron-String Dynamics (PHSD) transport approach which incorporates partonic and hadronic degrees-of-freedom, a phase transition from hadronic to partonic matter - Quark-Gluon-Plasma (QGP) - and a dynamical hadronization of quarks and antiquarks as well as final hadronic interactions. We investigate the role of in-medium effects on the $K^{\ast },{\bar{K}}^{\ast }$ meson dynamics by employing Breit-Wigner spectral functions for the $K^{\ast }$'s with self-energies obtained from a self-consistent coupled-channel G-matrix approach. Furthermore, we confront the PHSD calculations with experimental data for p+p, Cu+Cu and Au+Au collisions at energies up to $\sqrt{s_{NN}}=200$~GeV. Our analysis shows that at relativistic energies most of the final $K^{\ast }$s (observed experimentally) are produced during the late hadronic phase, dominantly by the $K+\pi \to K^{\ast }$ channel, such that the fraction of the $K^{\ast }$s from the QGP is small and can hardly be reconstructed from the final observables. The influence of the in-medium effects on the $K^{\ast }$ dynamics at RHIC energies is rather modest due to their dominant production at low baryon densities (but high meson densities), however, it increases with decreasing beam energy. Moreover, we find that the additional cut on the invariant mass region of the $K^{\ast }$ further influences the shape and the height of the final spectra. This imposes severe constraints on the interpretation of the experimental results.

References in corpus (42)

• Non perturbative chiral approach to s-wave \bar{K}N interactions
• Chiral Dynamics and the Low Energy Kaon-Nucleon Interaction
• The QCD transition temperature: results with physical masses in the continuum limit II.
• Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• The QCD Equation of State with almost Physical Quark Masses
• Hidden Local Symmetry at Loop -- A New Perspective of Composite Gauge Boson and Chiral Phase Transition
• Parton-Hadron-String Dynamics: an off-shell transport approach for relativistic energies
• The properties of \bar{K} in the nuclear medium
• Suppression of high transverse momentum D mesons in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Relativistic Transport Approach for Nucleus-Nucleus Collisions from SIS to SPS Energies
• Nuclear kaon dynamics
• Parton-Hadron-String Dynamics at Relativistic Collider Energies
• Dynamically generated resonances from the vector octet-baryon octet interaction
• K(892)* Resonance Production in Au+Au and p+p Collisions at sqrt(sNN) = 200 GeV at RHIC
• From Kadanoff-Baym dynamics to off-shell parton transport
• Effective QCD and transport description of dilepton and photon production in heavy-ion collisions and elementary processes
• Strange Resonance Production: Probing Chemical and Thermal Freeze-out in Relativistic Heavy Ion Collisions
• Dynamical quasiparticles properties and effective interactions in the sQGP
• Dilepton production and off-shell transport dynamics at SIS energies
• Hadronic resonance production and interaction in partonic and hadronic matter in EPOS3 with and without the hadronic afterburner UrQMD
• QCD thermodynamics and confinement from a dynamical quasiparticle point of view
• Antikaon production in A+A collisions at SIS energies within an off-shell G-matrix approach
• Strange hadrons and their resonances: a diagnostic tool of QGP freeze-out dynamics
• Partial wave contributions to the antikaon potential at finite momentum
• Odd Parity Light Baryon Resonances
• Chiral approach to antikaon s- and p-wave interactions in dense nuclear matter
• K*0 production in Cu+Cu and Au+Au collisions at \sqrt{s_NN} = 62.4 GeV and 200 GeV
• Nonequilibrium Quantum-Field Dynamics and Off-Shell Transport for ${\varphi }^4$-theory in 2+1 dimensions
• Interaction of vector mesons with baryons and nuclei
• An Overview of STAR Experimental Results
• Strange mesons in nuclear matter at finite temperature
• Formation and decay of hadronic resonances in the QGP
• System Size and Energy Dependence of Dilepton Production in Heavy-Ion Collisions at SIS Energies
• Antikaons and hyperons in nuclear matter with saturation
• QCD thermodynamics with continuum extrapolated Wilson fermions II
• ${\bar{K}}^{\ast }$ meson in dense matter
• Strange Hadron Resonances: Freeze-Out Probes in Heavy-Ion Collisions
• Resonances as a possible observable of hot and dense nuclear matter
• Properties of strange vector mesons in dense and hot matter
• The width of the omega meson in the nuclear medium
• K*0(892) and phi(1020) resonance production at RHIC

Cited by in corpus (13)

• Parton-Hadron-Quantum-Molecular Dynamics (PHQMD) -- A Novel Microscopic N-Body Transport Approach for Heavy-Ion Collisions, Dynamical Cluster Formation and Hypernuclei Production
• Influence of the hadronic phase on observables in ultrarelativistic heavy ion collisions
• In-medium effects in strangeness production in heavy-ion collisions at (sub-)threshold energies
• $\varphi$ meson self-energy in nuclear matter from $\varphi N$ resonant interactions
• Probing the hot and dense nuclear matter with $K^{\ast },{\bar{K}}^{\ast }$ vector mesons
• Influence of electromagnetic fields in proton-nucleus collisions at relativistic energy
• Hadronic resonance production and interaction in p-Pb collisions at LHC energies in EPOS3
• On the absorption and production cross sections of $K$ and $K^{\ast }$
• Strange mesons in strong magnetic fields
• Configurational entropy and shape complexity of strange vector kaons in AdS/QCD
• Spectral functions of strange vector mesons in asymmetric hyperonic matter
• Medium modification of strange hadronic resonances at SIS, RHIC and LHC energies
• Hadroproduction of neutral Kstar-mesons up to LHC energies