Beam–target helicity asymmetry E in K+Σ− photoproduction on the neutron
- Zachariou, N.
- Watts, D.P.
- Fleming, J.
- Sarantsev, A.V.
- Nikonov, V.A.
- D'Angelo, A.
- Bashkanov, M.
- Hanretty, C.
- Kageya, T.
- Klein, F.J.
- Lowry, M.
- Lu, H.
- Sandorfi, A.
- Wei, X.
- Zonta, I.
- Adhikari, K.P.
- Adhikari, S.
- Amaryan, M.J.
- Angelini, G.
- Asryan, G.
- Atac, H.
- Barion, L.
- Bass, C.
- Battaglieri, M.
- Bedlinskiy, I.
- Benmokhtar, F.
- Bianconi, A.
- Biselli, A.S.
- Bossù, F.
- Boiarinov, S.
- Briscoe, W.J.
- Brooks, W.K.
- Bulumulla, D.
- Burkert, V.
- Carman, D.S.
- Carvajal, J.C.
- Celentano, A.
- Charles, G.
- Chatagnon, P.
- Chetry, T.
- Ciullo, G.
- Cole, P.L.
- Contalbrigo, M.
- Dashyan, N.
- De Vita, R.
- Deur, A.
- Diehl, S.
- Djalali, C.
- Dupre, R.
- Egiyan, H.
- Ehrhart, M.
- El Alaoui, A.
- Eugenio, P.
- Fegan, S.
- Fersch, R.
- Filippi, A.
- Gavalian, G.
- Gevorgyan, N.
- Ghandilyan, Y.
- Gilfoyle, G.P.
- Girod, F.X.
- Gohn, W.
- Golovatch, E.
- Gothe, R.W.
- Griffioen, K.A.
- Guidal, M.
- Hafidi, K.
- Hakobyan, H.
- Hattawy, M.
- Heddle, D.
- Hicks, K.
- Ho, D.
- Holtrop, M.
- Ilieva, Y.
- Ireland, D.G.
- Ishkhanov, B.S.
- Isupov, E.L.
- Jenkins, D.
- Jo, H.S.
- Joo, K.
- Joosten, S.J.
- Keller, D.
- Khachatryan, M.
- Khanal, A.
- Khandaker, M.
- Kim, C.W.
- Kim, W.
- Kubarovsky, V.
- Lanza, L.
- Leali, M.
- Lenisa, P.
- Livingston, K.
- MacGregor, I.J.D.
- Marchand, D.
- Markov, N.
- Marsicano, L.
- Mascagna, V.
- Mayer, M.
- McKinnon, B.
- Meziani, Z.E.
- Mineeva, T.
- Mokeev, V.
- Munevar, E.
- Munoz Camacho, C.
- Nadel Turonski, P.
- O'Connell, T.R.
- Osipenko, M.
- Ostrovidov, A.I.
- Paolone, M.
- Pappalardo, L.L.
- Park, K.
- Pasyuk, E.
- Peng, P.
- Phelps, W.
- Pogorelko, O.
- Poudel, J.
- Price, J.W.
- Prok, Y.
- Puckett, A.J.R.
- Raue, B.A.
- Ripani, M.
- Rizzo, A.
- Rosner, G.
- Salgado, C.
- Schmidt, A.
- Schumacher, R.A.
- Shrestha, U.
- Sokhan, D.
- Soto, O.
- Sparveris, N.
- Strakovsky, I.I.
- Strauch, S.
- Tan, J.A.
- Tyler, N.
- Ungaro, M.
- Venturelli, L.
- Voskanyan, H.
- Voutier, E.
- Walford, N.K.
- Whisnant, C.S.
- Wood, M.H.
- Zhang, J.
- Zhao, Z.W.
DOIAbstract
We report a measurement of a beam–target double-polarisation observable (E) for the γ→n→(p) →K+Σ−(p)reaction. The data were obtained impinging the circularly-polarised energy-tagged photon beam of Hall B at Jefferson Lab on a longitudinally-polarised frozen-spin hydrogen deuteride (HD) nuclear target. The Eobservable for an effective neutron target was determined for centre-of-mass energies 1.70 ≤W≤2.30GeV, with reaction products detected over a wide angular acceptance by the CLAS spectrometer. These new double-polarisation data give unique constraints on the strange decays of excited neutron states. Inclusion of the new data within the Bonn-Gatchina theoretical model results in significant changes for the extracted photocouplings of a numb...
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