In-medium properties of the D13(1520) nucleon resonance

Abstract

The in-medium properties of the D13(1520) nucleon resonance were studied via photoproduction of pi0-mesons from nuclei (C, Ca, Nb, Pb) with the TAPS-detector at the Mainz MAMI accelerator. The inclusive (single and multiple pion production) data disagree with model predictions which explain the disappearance of the second resonance bump in total photoabsorption via a medium modification of the D13 --> N rho decay. The exclusive single pi0 production data show no broadening of the resonance structure beyond Fermi smearing. Although due to final state interaction effects pion production tests the nucleus at densities less than the average nuclear density, both results together cast doubt on attempts to explain the vanishing of the second resonance bump for heavy nuclei by a broadening of the D13-resonance in nuclear matter.

arXiv comment9 pages, 5 figures

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Cited by in corpus (19)

• Study of Non-Strange Baryon Resonances with Meson Photoproduction
• Photoproduction of pi0-mesons from nuclei
• Photoproduction of pi0pi0 and pi0pi+-pairs off the proton from threshold to the second resonance region
• Coherent pi0-photoproduction from atomic nuclei
• Photoproduction of eta-mesons off nuclei for Eg < 2.2 GeV
• Dilepton production in heavy-ion collisions with in-medium spectral functions of vector mesons
• In-medium broadening of nucleon resonances
• In-Medium rho^0 Spectral Function Study via the 2H, 3He, 12C(gamma,pi+pi-) Reaction
• Surface and volume effects in the photoabsorption of nuclei
• Double pion photoproduction off 40Ca
• Photoproduction of mesons from nuclei - In-medium properties of hadrons
• Photoproduction of $\eta$-mesons off C and Cu nuclei for photon energies below 1.1 GeV
• Self consistent and covariant propagation of pions, nucleon and isobar resonances in cold nuclear matter
• Two Pion Production in Photon Induced Reactions
• In-Medium Properties of Hadrons
• Double Pion Photoproduction from Nuclei
• In-medium properties of nucleon resonances
• A quark model framework for the study of nuclear medium effects
• Experimental Review of Baryons in the Nuclear Medium