In-Medium Properties of Hadrons - Observables II

Abstract

In this review we discuss the observable consequences of in-medium changes of hadronic properties in reactions with elementary probes, and in particular photons, on nuclei. After an outline of the theoretical method used we focus on a discussion of actual observables in photonuclear reactions; we discuss in detail $2\pi$- and vector-meson production. We show that the $2{\pi }^0$ photoproduction data can be well described by final state interactions of the pions produced whereas the semi-charged ${\pi }^0{\pi }^{\pm }$ channel exhibits a major discrepancy with theory. For $\omega$ production on nuclei in the TAPS/CB@ELSA experiment we analyse the ${\pi }^0\gamma$ decay channel, and illustrate the strength of the method by simulating experimental acceptance problems. 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 and make predictions for the on-going G7 experiment at JLAB. Finally we discuss that hadron production in nuclei at 10 -- 20 GeV photon energies can give important information on the hadronization process, and in particular on the time-scales involved. We show here detailed calculations for the low-energy (12 GeV) run at HERMES and predictions for planned experiments at JLAB.

Invited Talk by U. Mosel, Proceedings of the Int. School on Nuclear Physics, 26th Course, "Lepton scattering and the structure of hadrons and nuclei", Erice (Sicily), September 16th-24th, 2004, short piece of text added

References in corpus (48)

• 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
• rho^0 Production and Possible Modification in Au+Au and p+p Collisions at sqrt(s_NN) = 200 GeV
• Hadron Formation in Deep-Inelastic Positron Scattering in a Nuclear Environment
• What QCD sum rules tell about the rho meson
• Semiclassical transport of particles with dynamical spectral functions
• Nuclear Hadronization: Within or Without?
• Modification of the $\varphi$-meson spectrum in nuclear matter
• Hadronic Spectral Functions 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 attenuation in deep inelastic lepton-nucleus scattering
• Hadron production in deep inelastic lepton-nucleus scattering
• Towards a test particle description of transport processes for states with continuous mass spectra
• Nuclear bound states of $\omega$ mesons
• Quenching of hadron spectra in DIS on nuclear targets
• The $\rho$ Spectral Function in a Relativistic Resonance Model
• Dilepton production in heavy ion collisions at intermediate energies
• The $\sigma$ meson in a nuclear medium through two pion photoproduction
• Photoabsorption on nuclei
• The $\pi \pi$ interaction in nuclear matter from a study of the ${\pi }^{+}A\to {\pi }^{+}{\pi }^{\pm }{A}^{\prime }$ reactions
• On QCD sum rules for vector mesons in nuclear medium
• Photoproduction of phi mesons from nuclei
• Phases of QCD, Thermal Quasiparticles and Dilepton Radiation from a Fireball
• e+ e- pairs from pi- A reactions
• Inclusive omega photoproduction off nuclei
• Hadron formation and attenuation in deep inelastic lepton scattering off nuclei
• 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
• Shadowing in the nuclear photoabsorption above the resonance region
• Low-energy pi pi photoproduction off nuclei
• In-medium modifications of the S11(1535) resonance and eta photoproduction
• Final state interaction in semi-inclusive DIS off nuclei
• $e^{+}{e}^{-}$ 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
• In-medium Properties of Hadrons -- Observables
• Eta electroproduction on nuclei in the nucleon resonance region

Cited by in corpus (7)

• Charged Current Neutrino Nucleus Interactions at Intermediate Energies
• The spectral function of the omega meson in nuclear matter from a coupled-channel resonance model
• Time Dependent Hadronization via HERMES and EMC Data Consistency
• Neutral current neutrino-nucleus interactions at intermediate energies
• In-medium Hadrons - Properties, Interaction and Formation
• Modelling Nuclear Effects in Neutrino Scattering
• In-Medium Effects in Photo- and Neutrino-Induced Reactions on Nuclei