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

Kohl, M. and Ases Antelo, M. and Ayerbe, C. and Baumann, D. and Bohm, R. and Bosnar, Damir and Ding, M. and Distler, M. O. and Friedrich, J. and Garcia Llongo, J. and Jennewein, P. and Jover Manas, G. and Merkel, H. and Merle, P. and Muller, U. and Neuhausen, R. and Nungesser, L. and Perez Benito, R. and Pochodzalla, J. and Potokar, M. and Rangacharyulu, C. and Richter, A. and Schrieder, G. and Seimetz, M. and Walcher, Th. and Weis, M. (2003) Search for narrow nucleon resonances below pion threshold in the H(e,e′π+)X and 2H(e,e′p)X reactions. Physical Review C, 67 (6). pp. 65204-6. ISSN 0556-2813

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In two series of high-resolution coincidence experiments at the three-spectrometer facility at MAMI, the H(e, epi+)X and 2H(e, ep)X reactions were studied to search for narrow nucleon resonances below pion threshold. The missing-mass resolution was 0.6-1.6 MeV/c2 full width at half maximum in the proton experiment and 0.9-1.3 MeV/c2 in the deuteron experiment. The experiments covered the missing-mass region from the neutron mass up to about 1050 and 1100 MeV/c2, respectively. None of our measurements showed a signal for narrow resonances to a level of down to 10-4 with respect to the neutron peak in the missing-mass spectra.

Item Type: Article
Keywords: nuclei with mass number 1 to 5 ; electron-nucleus reactions ; pion production ; proton production ; baryon production
Date: June 2003
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2003) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 0119259
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 05 Jun 2014 08:46
Last Modified: 05 Jun 2014 08:46

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