Search for narrow nucleon resonances below pion threshold in the H(e,eπ+)X and 2H(e,ep)X reactions

M. Kohl et al.
Phys. Rev. C 67, 065204 – Published 25 June 2003
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Abstract

In two series of high-resolution coincidence experiments at the three-spectrometer facility at MAMI, the H(e,eπ+)X and 2H(e,ep)X reactions were studied to search for narrow nucleon resonances below pion threshold. The missing-mass resolution was 0.61.6MeV/c2 full width at half maximum in the proton experiment and 0.91.3MeV/c2 in the deuteron experiment. The experiments covered the missing-mass region from the neutron mass up to about 1050 and 1100MeV/c2, respectively. None of our measurements showed a signal for narrow resonances to a level of down to 104 with respect to the neutron peak in the missing-mass spectra.

  • Received 18 December 2002

DOI:https://doi.org/10.1103/PhysRevC.67.065204

©2003 American Physical Society

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Vol. 67, Iss. 6 — June 2003

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