In-Medium Properties of theD13(1520) Nucleon Resonance

2001/05/21 by B. Krusche, J. Ahrens, R. Beck +5 · 4 citations
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex

paper · pdf · doi:10.1103/physrevlett.86.4764

published as Phys.Rev.Lett. 86 (2001) 4764-4767 · 9 pages, 5 figures

openalex publication_date 2001/05/21 · arxiv created 2003/04/02 · arxiv updated 2009/12/01 · openalex created_date 2021/07/19 · openalex updated_date 2026/07/28

Abstract

The in-medium properties of the D₁₃(1520) nucleon resonance were studied via photoproduction of \ensuremathπ⁰ mesons from nuclei (C, Ca, Nb, Pb) with the TAPS detector at the Mainz Microton 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\ensuremath→N\ensuremathρ decay. The exclusive single \ensuremathπ⁰ production data show no broadening of the resonance structure beyond Fermi smearing. Both results together cast doubt on attempts to explain the vanishing of the second resonance bump for nuclei by a broadening of the D₁₃ resonance.

Cited by

• Photoproduction of π0π0 - and π0π+ -pairs off the proton from threshold to the second resonance region
• Coherent π0-photoproduction from atomic nuclei
• Photoproduction of mesons from nuclei —in-medium properties of hadrons
• Self consistent and covariant propagation of pions, nucleon and isobar resonances in cold nuclear matter