Q2 dependence of the S11(1535) photocoupling and evidence for a P-wave resonance in η electroproduction


Journal Article

New cross sections for the reaction ep→e'ηp are reported for total center-of-mass energy W=1.5-2.3 GeV and invariant squared momentum transfer Q2=0.13-3.3 GeV2. This large kinematic range allows the extraction of new information about response functions, photocouplings, and ηN coupling strengths of baryon resonances. A sharp structure is seen at W~1.7 GeV. The shape of the differential cross section is indicative of the presence of a P-wave resonance that persists to high Q2. Improved values are derived for the photocoupling amplitude for the S11(1535) resonance. The new data greatly expand the Q2 range covered, and an interpretation of all data with a consistent parametrization is provided. © 2007 The American Physical Society.

Full Text

Duke Authors

Cited Authors

  • Denizli, H; Mueller, J; Dytman, S; Leber, ML; Levine, RD; Miles, J; Kim, KY; Adams, G; Amaryan, MJ; Ambrozewicz, P; Anghinolfi, M; Asavapibhop, B; Asryan, G; Avakian, H; Bagdasaryan, H; Baillie, N; Ball, JP; Baltzell, NA; Barrow, S; Batourine, V; Battaglieri, M; Beard, K; Bedlinskiy, I; Bektasoglu, M; Bellis, M; Benmouna, N; Bianchi, N; Biselli, AS; Bonner, BE; Bouchigny, S; Boiarinov, S; Bradford, R; Branford, D; Briscoe, WJ; Brooks, WK; Bültmann, S; Burkert, VD; Butuceanu, C; Calarco, JR; Careccia, SL; Carman, DS; Cetina, C; Chen, S; Cole, PL; Coleman, A; Collins, P; Coltharp, P; Cords, D; Corvisiero, P; Crabb, D; Crede, V; Cummings, JP; Dashyan, N; Vita, RD; Sanctis, ED; Degtyarenko, PV; Dennis, L; Deur, A; Dhuga, KS; Dickson, R; Djalali, C; Dodge, GE; Donnelly, J; Doughty, D; Dragovitsch, P; Dugger, M; Dzyubak, OP; Egiyan, H; Egiyan, KS; Fassi, LE; Elouadrhiri, L; Empl, A; Eugenio, P; Farhi, L; Fatemi, R; Fedotov, G; Feldman, G; Feuerbach, RJ; Forest, TA; Frolov, V; Funsten, H; Gaff, SJ; Garçon, M; Gavalian, G; Gilfoyle, GP; Giovanetti, KL; Girard, P; Girod, FX; Goetz, JT; Gonenc, A; Gothe, RW; Griffioen, KA; Guidal, M; Guillo, M; Guler, N; Guo, L; Gyurjyan, V; Hafidi, K; Hakobyan, H; Hakobyan, RS

Published Date

  • July 27, 2007

Published In

Volume / Issue

  • 76 / 1

Electronic International Standard Serial Number (EISSN)

  • 1089-490X

International Standard Serial Number (ISSN)

  • 0556-2813

Digital Object Identifier (DOI)

  • 10.1103/PhysRevC.76.015204

Citation Source

  • Scopus