Electroproduction of {eta} mesons in the S{sub 11}(1535) resonance region at high momentum transfer
Journal Article
·
· Physical Review. C, Nuclear Physics
- University of the Witwatersrand, Johannesburg (South Africa)
- Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)
- North Carolina A and T State University, Greensboro, North Carolina 27411 (United States)
- Bucharest University, Bucharest (Romania)
- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Yerevan Physics Institute, Yerevan (Armenia)
- Hampton University, Hampton, Virginia 23668 (United States)
The differential cross section for the process p(e,e{sup '}p){eta} has been measured at Q{sup 2}{approx}5.7 and 7.0(GeV/c){sup 2} for center-of-mass energies from threshold to 1.8 GeV, encompassing the S{sub 11}(1535) resonance, which dominates the channel. This is the highest momentum-transfer measurement of this exclusive process to date. The helicity-conserving transition amplitude A{sub 1/2}, for the production of the S{sub 11}(1535) resonance, is extracted from the data. Within the limited Q{sup 2} now measured, this quantity appears to begin scaling as Q{sup -3}--a predicted, but not definitive, signal of the dominance of perturbative QCD at Q{sup 2}{approx}5 (GeV/c){sup 2}.
- OSTI ID:
- 21290014
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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