In-medium Properties of Hadrons -- Observables

Abstract

We first briefly review the theoretical basis for calculations of changes of hadronic properties in dense nuclear matter. These changes have usually been investigated by means of relativistic heavy-ion reactions. Here we discuss that observable consequences of such changes can also be seen in more elementary reactions on nuclei. Particular emphasis is put on a discussion of actual observables in photonuclear reactions; we discuss in detail $\eta$- and vector-meson production. We show that photoproduction of $\eta$'s can yield essential information on in-medium properties of the $S_{11}(1535)$ resonance while the $\varphi$ meson properties will probably not be accessible through the $K^{+}{K}^{-}$ decay channel. However, for $\omega$ mesons the ${\pi }^0\gamma$ decay channel, due to its reduced final state interaction, looks more promising in this respect. Completely free of final state interactions is dilepton production in the few GeV range. We show that the sensitivity of this decay channel to changes of hadronic properties in medium in photonuclear reactions on nuclei is as large as in ultrarelativistic heavy ion collisions. Finally we discuss that hadron production in nuclei at 10 -- 20 GeV photon energies can give important information on the hadronization process.

Invited Lecture by U. Mosel at Erice International School on Nuclear Physics 2003

References in corpus (34)

• Relativistic chiral SU(3) symmetry, large N_c sum rules and meson-baryon scattering
• Current correlation functions, QCD sum rules and vector mesons in baryonic matter
• Jet Tomography of Hot and Cold Nuclear Matter
• In-medium Production of Kaons at the Mean-Field Level
• Dielectron Cross Section Measurements in Nucleus-Nucleus Reactions at 1.0 A GeV
• The Spectral Function of the Rho Meson in Nuclear Matter
• Dilepton Production at SPS Energies
• Hadron Formation in Deep-Inelastic Positron Scattering in a Nuclear Environment
• What QCD sum rules tell about the rho meson
• Modification of the $\varphi$-meson spectrum in nuclear matter
• e^+e^- Pair Production from $\gamma$ A Reactions
• The antikaon nuclear potential in hot and dense matter
• In-medium modifications of the $\pi \pi$ interaction in photon-induced reactions
• Hadron production in deep inelastic lepton-nucleus scattering
• Nuclear bound states of $\omega$ mesons
• Quenching of hadron spectra in DIS on nuclear targets
• The $\rho$ Spectral Function in a Relativistic Resonance Model
• Photoabsorption on nuclei
• On QCD sum rules for vector mesons in nuclear medium
• Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball
• Photoproduction of phi mesons from nuclei
• e+ e- pairs from pi- A reactions
• Studying the $\omega$-mass in-medium in $\gamma +A\to {\pi }^0\gamma +X$ reactions
• QCD sum rule analysis for light vector and axial-vector mesons in vacuum and nuclear matter
• Latest Results from CERES/NA45
• Photoproduction of mesons in nuclei at GeV energies
• Final state interaction in semi-inclusive DIS off nuclei
• In-medium modifications of the S11(1535) resonance and eta photoproduction
• $e^{+}{e}^{-}$ pairs from ${\pi }^{-}$A reactions
• Dileptons in High-Energy Heavy-Ion Collisions
• Hadrons in the Nuclear Medium
• Hadron formation in high energy photonuclear reactions
• Incoherent rho^0 electroproduction off nuclei
• $\rho /\omega$ properties from dilepton spectra in $pA$ reactions at 12 GeV

Cited by in corpus (8)

• Charged Current Neutrino Nucleus Interactions at Intermediate Energies
• The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model
• Neutral current neutrino-nucleus interactions at intermediate energies
• In-Medium Properties of Hadrons - Observables II
• Strangeness and hypernuclear production in fragmentation reactions induced by antikaons
• Strangeness production and hypernuclear formation in proton and antiproton induced reactions
• In-medium Hadrons - Properties, Interaction and Formation
• In-Medium Effects in Photo- and Neutrino-Induced Reactions on Nuclei