In-medium properties of the D-13(1520) nucleon resonance

Citation
B. Krusche et al., In-medium properties of the D-13(1520) nucleon resonance, PHYS REV L, 86(21), 2001, pp. 4764-4767
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
21
Year of publication
2001
Pages
4764 - 4767
Database
ISI
SICI code
0031-9007(20010521)86:21<4764:IPOTDN>2.0.ZU;2-6
Abstract
The in-medium properties of the D-13(1520) nucleon resonance were studied v ia photoproduction of pi (0) mesons from nuclei (C, Ca, Nb, Pb) with the TA PS detector at the Mainz Microton accelerator. The inclusive (single and mu ltiple 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 D-13 --> N rho decay. The exclusive single pi (0) production data show no broadening of the resonance structure beyond F ermi smearing. Both results together cast doubt on attempts to explain the vanishing of the second resonance bump for nuclei by a broadening of the D- 13 resonance.