The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model

Abstract

We calculate the spectral function of the omega meson in nuclear matter at zero temperature by means of the low-density theorem. The omega N forward scattering amplitude is calculated within a unitary coupled-channel effective Lagrangian model that has been applied successfully to the combined analysis of pion- and photon-induced reactions. While the peak of the omega spectral distribution is shifted only slightly, we find a considerable broadening of the omega meson due to resonance-hole excitations. For omega mesons at rest with respect to the surrounding nuclear medium, we find an additional width of about 60 MeV at saturation density.

arXiv comment26 pages, 10 figures, added short discussion

References in corpus (40)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• First Measurement of the rho Spectral Function in High-Energy Nuclear Collisions
• Current correlation functions, QCD sum rules and vector mesons in baryonic matter
• Enhancement of low-mass dileptons in heavy-ion collisions
• Low-mass e+e- pair production in 158 A GeV Pb-Au collisions at the CERN SPS, its dependence on multiplicity and transverse momentum
• First observation of in-medium modifications of the omega meson
• Photon- and meson-induced reactions on the nucleon
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV I: pion-induced results and hadronic parameters
• A unitary model for meson-nucleon scattering
• Dilepton Production at SPS Energies
• Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m_N < sqrt(s) < 2 GeV II: photon-induced results
• What QCD sum rules tell about the rho meson
• P-Wave Polarization of the $\rho$-Meson and the Dilepton Spectrum in Dense Matter
• Coupled-channel analysis of the $\omega$-meson production in $\pi N$ and $\gamma N$ reactions for c.m. energies up to 2 GeV
• Dilepton Production from AGS to SPS Energies within a Relativistic Transport Approach
• Hadronic Spectral Functions in Nuclear Matter
• e^+e^- Pair Production from $\gamma$ A Reactions
• Observation of $\rho /\omega$ Meson Modification in Nuclear Matter
• Analysis of the HELIOS-3 ${\mu }^{+}{\mu }^{-}$ Data within a Relativistic Transport Approach
• Nuclear bound states of $\omega$ mesons
• Recent results from Pb-Au collisions at 158 GeV/c per nucleon obtained with the CERES spectrometer
• Sigma and omega meson propagation in a dense nuclear medium
• Photoproduction of phi mesons from nuclei
• Inclusive omega photoproduction off nuclei
• Rho-omega mixing in asymmetric nuclear matter via QCD sum rule approach
• Spin-5/2 resonance contributions to the pion-induced reactions for energies $\sqrt{s}⩽$2.0 GeV
• Coupling of Baryon Resonances to the $N\omega$ channel
• In-medium spectral change of omega mesons as a probe of QCD four-quark condensate
• Latest Results from CERES/NA45
• Evidence for In-Medium Changes of Four-Quark Condensates
• omega-nucleus bound states in the Walecka model
• Self-consistent description of vector-mesons in matter
• Properties of the $\omega$ Meson at Finite Temperature and Density
• Factorization and Non-Factorization of In-Medium Four-Quark Condensates
• Hadrons in the Nuclear Medium
• Omega meson propagation in dense nuclear matter and collective excitations
• QCD sum rules at finite density in the large-N_c limit: The coupling of the rho-nucleon system to the D_{13}(1520)
• In-medium Properties of Hadrons -- Observables
• Dilepton emission rates from hot hadronic matter
• In-Medium Properties of Hadrons - Observables II

Cited by in corpus (33)

• Hadrons in strongly interacting matter
• Meson-nucleus potentials and the search for meson-nucleus bound states
• QCD sum rules for D and B mesons in nuclear matter
• Inclusive $\omega$ photoproduction from nuclei and $\omega$ in the nuclear medium
• The role of the $\Lambda (1405)$ in the $pp\to p{K}^{+}\Lambda (1405)$ reaction
• Momentum dependence of the imaginary part of the $\omega$- and ${\eta }^{\prime }$-nucleus optical potential
• More about the $B$ and $D$ mesons in nuclear matter
• ${\bar{K}}^{\ast }$ meson in dense matter
• Dilepton production in heavy-ion collisions with in-medium spectral functions of vector mesons
• Dilepton Radiation from Strongly Interacting Systems
• How Sensitive are Di-Leptons from Rho Mesons to the High Baryon Density Region?
• Study of possible ωbound states in nuclei with the (γ,p) reaction
• Medium Modifcations of Mesons in Elementary Reactions and Heavy-Ion Collisions
• Experimental approaches for determining in-medium properties of hadrons from photo-nuclear reactions
• Dynamical coupled channel calculation of pion and omega meson production
• Dilepton production in microscopic transport theory with in-medium $\rho$-meson spectral function
• The reaction $\pi N\to \omega N$ in a dynamical coupled-channel approach
• The width of the omega meson in the nuclear medium
• Hadrons in Nuclei -- from High (200 GeV) to Low (1 GeV) energies
• In-medium vector mesons and low mass lepton pairs from heavy ion collisions
• The $\pi \rho$ Cloud Contribution to the $\omega$ Width in Nuclear Matter
• Analysis of $\omega$ self-energy at finite temperature and density in the real-time formalism
• Anomaly-induced Chiral Mixing in Cold and Dense Matter
• Absorption of $\omega$ and $\varphi$ mesons in the inclusive photonuclear reaction
• Interactions of $\omega$-Mesons in Nuclear Matter and with Nuclei
• In-medium modification and decay asymmetry of omega mesons in cold nuclear matter
• Chiral Symmetry in Nuclei -- Theoretical Expectations and Hard Facts
• Nuclear effects on the $\rho$ meson produced in the inclusive photonuclear reaction
• In-medium Hadrons - Properties, Interaction and Formation
• Transparency of the $\gamma (n,p){\pi }^{-}$ reaction in nuclei
• Hadrons in Medium -- Theory meets Experiment
• Resonance nucleon scattering amplitude in the photonuclear reaction
• Omega mesons in medium - revisited