Probing the hot and dense nuclear matter with $K^{\ast },{\bar{K}}^{\ast }$ vector mesons

Abstract

We investigate probing the hot and dense nuclear matter with strange vector mesons ($K^{\ast },{\bar{K}}^{\ast }$). Our analysis is based on PHSD which incorporates partonic and hadronic dof and describes the full dynamics of HICs. This allows to study the $K^{\ast }$ and ${\bar{K}}^{\ast }$ meson formation from the QGP and the in-medium effects related to the modification of their properties during the propagation in dense and hot matter. We employ relativistic Breit-Wigner spectral functions for the $K^{\ast },{\bar{K}}^{\ast }$ mesons with self-energies obtained from a G-matrix approach to study the role of in-medium effects on the $K^{\ast }$ and ${\bar{K}}^{\ast }$ meson dynamics in HIC from FAIR/NICA to LHC energies. According to our analysis most of the final $K^{\ast }/{\bar{K}}^{\ast }$s, that can be observed experimentally, are produced during the late hadronic phase and stem dominantly from the $K(\bar{K})+\pi \to K^{\ast }({\bar{K}}^{\ast })$ formation channel. The amount of $K^{\ast }/{\bar{K}}^{\ast }$s originating from the QGP channel is comparatively small even at LHC energies and such $K^{\ast }/{\bar{K}}^{\ast }$s can hardly be reconstructed experimentally due to the rescattering of final pions and (anti-)kaons. This mirrors the results from our previous study on the strange vector-meson production in HICs at RHIC energies. The influence of the in-medium effects on the dynamics of the $K^{\ast }/{\bar{K}}^{\ast }$ is rather small since they are mostly produced at low baryon densities. Additional cuts on the shape of the observed signal and the range of the invariant mass region of the $K^{\ast }/{\bar{K}}^{\ast }$ also affect the final spectra. We demonstrate that the $K^{\ast }/{\bar{K}}^{\ast }$ in-medium effects are more visible at lower beam energy, e.g. FAIR/NICA and BES RHIC energies, where the production of $K^{\ast }/{\bar{K}}^{\ast }$s occurs at larger baryon densities. Finally, we present the experimental procedures to extract information on the in-medium masses and widths by fitting final mass spectra at LHC energies.

24 pages, 34 figures, extended version as published in Phys. Rev. C

References in corpus (17)

• The QCD transition temperature: results with physical masses in the continuum limit II.
• The QCD Equation of State with almost Physical Quark Masses
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• From Kadanoff-Baym dynamics to off-shell parton transport
• Dynamical quasiparticles properties and effective interactions in the sQGP
• Dilepton production and off-shell transport dynamics at SIS energies
• QCD thermodynamics and confinement from a dynamical quasiparticle point of view
• Chiral approach to antikaon s- and p-wave interactions in dense nuclear matter
• Interaction of vector mesons with baryons and nuclei
• Chiral symmetry restoration in heavy-ion collisions at intermediate energies
• Strange mesons in nuclear matter at finite temperature
• Influence of the hadronic phase on observables in ultrarelativistic heavy ion collisions
• Formation and decay of hadronic resonances in the QGP
• Antikaons and hyperons in nuclear matter with saturation
• ${\bar{K}}^{\ast }$ meson in dense matter
• $K^{\ast }$ vector meson resonances dynamics in heavy-ion collisions
• 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
• Evidence of rescattering effect in Pb-Pb collisions at the LHC through production of ${\mathrm{K}}^{\ast }(892{)}^0$ and $\varphi (1020)$ mesons
• In-medium effects in strangeness production in heavy-ion collisions at (sub-)threshold energies
• Production of the $\rho$(770)${}^0$ meson in pp and Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Delta mass shift as a thermometer of kinetic decoupling in Au+Au reactions at 1.23 AGeV
• Hadronic resonance production and interaction in p-Pb collisions at LHC energies in EPOS3
• Strange mesons in strong magnetic fields
• Spectral functions of strange vector mesons in asymmetric hyperonic matter
• Space-time structure of particle emission and femtoscopy scales in ultrarelativistic heavy-ion collisions
• Probing Late-Stage Hadronic Interactions at High Baryon Density via $K^{\ast 0}$ Production in the RHIC Beam Energy Scan Program
• Resonance Production in Heavy-Ion Collisions
• Medium modification of strange hadronic resonances at SIS, RHIC and LHC energies
• Applicability of Hydrodynamics in Hadronic Phase of Heavy-Ion Collisions