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

Krusche, B., Ahrens, J., Beck, R., MacGregor, I.J.D. , McGeorge, J.C., Metag, V. and Stroher, H. (2001) In-medium properties of the D13(1520)nucleon resonance. Physical Review Letters, 86(21), 4764 -4767. (doi:10.1103/PhysRevLett.86.4764)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevLett.86.4764

Abstract

The in-medium properties of the D13(1520) nucleon resonance were studied via photoproduction of pi (0) 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 → N rho decay. The exclusive single pi (0) 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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McGeorge, Dr John and MacGregor, Professor I
Authors: Krusche, B., Ahrens, J., Beck, R., MacGregor, I.J.D., McGeorge, J.C., Metag, V., and Stroher, H.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114

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