- Stepanyan, S; Hicks, K; Carman, DS; Pasyuk, E; Schumacher, RA; Smith, ES; Tedeschi, DJ; Todor, L; Adams, G; Ambrozewicz, P; Anciant, E; Anghinolfi, M; Asavapibhop, B; Audit, G; Avakian, H; Bagdasaryan, H; Ball, JP; Barrow, SP; Battaglieri, M; Beard, K; Bektasoglu, M; Bellis, M; Berman, BL; Bianchi, N; Biselli, AS; Boiarinov, S; Bouchigny, S; Bradford, R; Branford, D; Briscoe, WJ; Brooks, WK; Burkert, VD; Butuceanu, C; Calarco, JR; Carnahan, B; Chen, S; Ciciani, L; Cole, PL; Coleman, A; Cords, D; Corvisiero, P; Crabb, D; Crannell, H; Cummings, JP; de Sanctis, E; Degtyarenko, PV; Denizli, H; Dennis, L; DeVita, R; Dharmawardane, KV; Dhuga, KS; Djalali, C; Dodge, GE; Doughty, D; Dragovitsch, P; Dugger, M; Dytman, S; Dzyubak, OP; Egiyan, H; Egiyan, KS; Elouadrhiri, L; Empl, A; Eugenio, P; Fatemi, R; Feuerbach, RJ; Ficenec, J; Forest, TA; Funsten, H; Garçon, M; Gavalian, G; Gilfoyle, GP; Giovanetti, KL; Gordon, CIO; Gothe, R; Griffioen, K; Guidal, M; Guillo, M; Guo, L; Gyurjyan, V; Hadjidakis, C; Hakobyan, RS; Hardie, J; Heddle, D; Heimberg, P; Hersman, FW; Hicks, RS; Holtrop, M; Hu, J; Hyde-Wright, CE; Ito, MM; Jenkins, D; Joo, K; Juengst, HG; Kellie, JD; Khandaker, M; Kim, KY; Kim, K; Kim, W; Klein, A; Klein, FJ
- An exotic S = +1 baryon was observed in exclusive photoproduction from the deuteron. The peak was at 1.542±0.005 GeV/c2 with a measured width of 0.021 GeV/c2 FWHM, which is largely determined by experimental mass resolution. Photon beams were produced by 2.474 and 3.115 GeV electrons incident on a bremsstrahlung radiator of thickness 10-4 radiation lengths. The mass and width of the observed peak were found to be consistent with a narrow S = +1 baryon by other experimental groups.
- December 19, 2003
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