Measurement of ep → e′ pπ<sup>+</sup> π<sup>-</sup> and Baryon resonance analysis

Measurement of ep → e′ pπ⁺ π^- and Baryon resonance analysis Article

Ripani, M, Burkert, VD, Mokeev, V et al. (2003). Measurement of ep → e′ pπ⁺ π^- and Baryon resonance analysis . PHYSICAL REVIEW LETTERS, 91(2),

Ripani, M; Burkert, VD; Mokeev, V; Battaglieri, M; de Vita, R; Golovach, E; Taiuti, M; Adams, G; Anciant, E; Anghinolfi, M; Asavapibhop, B; Audit, G; Auger, T; Avakian, H; Bagdasaryan, H; Ball, JP; Barrow, S; Beard, K; Bektasoglu, M; Bellis, M; Berman, BL; Bianchi, N; Biselli, AS; Boiarinov, S; Bonner, BE; Bouchigny, S; Bradford, R; Branford, D; Briscoe, WJ; Brooks, WK; Calarco, JR; Carman, DS; Carnahan, B; Cazes, A; Cetina, C; 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; Dharmawardane, KV; Djalali, C; Dodge, GE; Doughty, D; Dragovitsch, P; Dugger, M; Dytman, S; Eckhause, M; Egiyan, H; Egiyan, KS; Elouadrhiri, L; Empl, A; Fatemi, R; Fedotov, G; Feldman, G; Feuerbach, RJ; Ficenec, J; Forest, TA; Funsten, H; Gaff, SJ; Gai, M; Garçon, M; Gavalian, G; Gilad, S; Gilfoyle, GP; Giovanetti, KL; Girard, P; Griffioen, K; Guidal, M; Guillo, M; Guo, L; Gyurjyan, V; Hadjidakis, C; Hardie, J; Heddle, D; Heimberg, P; Hersman, FW; Hicks, K; Hicks, RS; Holtrop, M; Hu, J; Hyde-Wright, CE; Ishkhanov, B; Ito, MM; Jenkins, D; Joo, K; Kelley, JH; Kellie, JD; Khandaker, M; Kim, KY; Kim, K; Kim, W; Klein, A

Some data on a reaction in a wide kinematic range, with higher quality than any previous double-pion production experiment is presented. Phenomenological calculations using existing PDG parameters provided a general good agreement with the new data, except for the structure at W∼1700 MeV. This paper explores on two alternative interpretations of the data.