Electroproduction of η mesons in the S11(1535) resonance region at high momentum transfer

Dalton, M. M.; Adams, G. S.; Ahmidouch, A.; Angelescu, T.; Arrington, J.; Asaturyan, R.; Baker, O. K.; Benmouna, N.; Bertoncini, C.; Boeglin, W. U.; Bosted, P. E.; Breuer, H.; Christy, M. E.; Connell, S. H.; Cui, Y.; Danagoulian, S.; Day, D.; Dodario, T.; Dunne, J. A.; Dutta, D.; Khayari, N. El; Ent, R.; Fenker, H. C.; Frolov, V. V.; Gan, L.; Gaskell, D.; Hafidi, K.; Hinton, W.; Holt, R. J.; Horn, T.; Huber, G. M.; Hungerford, E.; Jiang, X.; Jones, M. K.; Joo, K.; Kalantarians, N.; Kelly, J. J.; Keppel, C. E.; Kubarovsky, V.; Li, Y.; Liang, Y.; Malace, S.; Markowitz, P.; McKee, P.; Meekins, D. G.; Mkrtchyan, H.; Moziak, B.; Navasardyan, T.; Niculescu, G.; Niculescu, I.; Opper, A. K.; Ostapenko, T.; Reimer, P. E.; Reinhold, J.; Roche, J.; Rock, S. E.; Schulte, E.; Segbefia, E.; Smith, C.; Smith, G. R.; Stoler, P.; Tadevosyan, V.; Tang, L.; Tvaskis, V.; Ungaro, M.; Uzzle, A.; Vidakovic, S.; Villano, A.; Vulcan, W. F.; Wang, M.; Warren, G.; Wesselmann, F. R.; Wojtsekhowski, B.; Wood, S. A.; Xu, C.; Yuan, L.; Zheng, X.; Zhu, H.

doi:10.1103/PhysRevC.80.015205

Title: Electroproduction of $η$ mesons in the $S_{11} (1535)$ resonance region at high momentum transfer

Journal Article · Wed Jul 01 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.80.015205· OSTI ID:962875

Dalton, M. M.; Adams, G. S.; Ahmidouch, A.; Angelescu, T.; Arrington, J.; Asaturyan, R.; Baker, O. K.; Benmouna, N.; Bertoncini, C.; Boeglin, W. U.; Bosted, P. E.; Breuer, H.; Christy, M. E.; Connell, S. H.; Cui, Y.; Danagoulian, S.; Day, D.; Dodario, T.; Dunne, J. A.; Dutta, D. more »

The differential cross section for the process p(e,e{prime}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}.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Science Foundation (NSF); South African National Research Association

DOE Contract Number:: DE-AC02-06CH11357

OSTI ID:: 962875

Report Number(s):: ANL/PHY/JA-61197; PRVCAN; TRN: US0902955

Journal Information:: Physical Review. C, Nuclear Physics, Vol. 80, Issue 1; ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: ENGLISH

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