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29 March 2024
 
  » arxiv » 0804.3509

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Electroproduction of Eta Mesons in the S11(1535) Resonance Region at High Momentum Transfer
M. M. Dalton ; G. S. Adams ; A. Ahmidouch ; T. Angelescu ; J. Arrington ; R. Asaturyan ; O. K. Baker ; N. Benmouna ; C. Bertoncini ; W. U. Boeglin ; P. E. Bosted ; H. Breuer ; M. E. Christy ; S. H. Connell ; Y. Cui ; S. Danagoulian ; D. Day ; T. Dodario ; J. A. Dunne ; D. Dutta ; N. El Khayari ; R. Ent ; H. C. Fenker ; V. V. Frolov ; L. Gan ; D. Gaskell ; K. Hafidi ; W. Hinton ; R. J. Holt ; T. Horn ; G. M. Huber ; E. Hungerford ; X. Jiang ; M. K. Jones ; K. Joo ; N. Kalantarians ; J. J. Kelly ; C. E. Keppel ; V. Kubarovsky ; Y. Li ; Y. Liang ; S. Malace ; P. Markowitz ; P. McKee ; D. G. Meekins ; H. Mkrtchyan ; B. Moziak ; T. Navasardyan ; G. Niculescu ; I. Niculescu ; A. K. Opper ; T. Ostapenko ; P. E. Reimer ; J. Reinhold ; J. Roche ; S. E. Rock ; E. Schulte ; E. Segbefia ; C. Smith ; G. R. Smith ; P. Stoler ; V. Tadevosyan ; L. Tang ; V. Tvaskis ;
Date 22 Apr 2008
AbstractThe differential cross-section for the process p(e,e’p)eta has been measured at Q2 ~ 5.7 and 7.0 (GeV/c)2 for centre-of-mass energies from threshold to 1.8 GeV, encompassing the S11(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_1/2, for the production of the S11(1535) resonance, is extracted from the data. This quantity appears to begin scaling as 1/Q3, a predicted signal of the dominance of perturbative QCD, at Q2 ~ 5 (GeV/c)2.
Source arXiv, 0804.3509
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