Experimental study of the P-11(1440) and D-13(1520) resonances from the CLAS data on ep -> e 'pi(+)pi(-)p
- Mokeev, V
- Burkert, V
- Elouadrhiri, L
- Fedotov, G
- Golovatch, E
- Gothe, R
- Ishkhanov, B
- Isupov, E
- Adhikari, K
- Aghasyan, M
- Anghinolfi, M
- Avakian, H
- Baghdasaryan, H
- Ball, J
- Baltzell, N
- Battaglieri, M
- Batourine, V
- Bedlinskiy, I
- Biselli, A
- Bookwalter, C
- Boiarinov, S
- Briscoe, W
- Brooks, W
- Carman, D
- Celentano, A
- Charles, G
- Cole, P
- Contalbrigo, M
- Crede, V
- Daniel, A
- Dashyan, N
- De Vita, R
- De Sanctis, E
- Deur, A
- Djalali, C
- Doughty, D
- Dupre, R
- El Alaoui, A
- Eugenio, P
- Fegan, S
- Fradi, A
- Giovanetti, K
- Girod, F
- Gohn, W
- Graham, L
- Griffioen, K
- Guegan, B
- Guidal, M
- Guo, L
- Hafidi, K
- Hakobyan, H
- Hanretty, C
- Hicks, K
- Ho, D
- Holtrop, M
- Ilieva, Y
- Ireland, D
- Jo, H
- Joo, K
- Keller, D
- Khandaker, M
- Khetarpal, P
- Kim, A
- Kim, W
- Klein, A
- Klein, F
- Koirala, S
- Kubarovsky, A
- Kubarovsky, V
- Kuleshov, S
- Kvaltine, N
- Livingston, K
- Lu, H
- MacGregor, I
- Mao, Y
- Markov, N
- Martinez, D
- Mayer, M
- McKinnon, B
- Meyer, C
- Mineeva, T
- Mirazita, M
- Moutarde, H
- Munevar, E
- Nadel Turonski, P
- Nepali, C
- Ostrovidov, A
- Pappalardo, L
- Paremuzyan, R
- Park, K
- Park, S
- Pasyuk, E
- Pereira, S
- Pisano, S
- Pogorelko, O
- Pozdniakov, S
- Price, J
- Procureur, S
- Protopopescu, D
- Raue, B
- Ricco, G
- Rimal, D
- Ripani, M
- Rosner, G
- Rossi, P
- Sabatie, F
- Saini, M
- Salgado, C
- Schott, D
- Schumacher, R
- Seder, E
- Seraydaryan, H
- Sharabian, Y
- Smith, G
- Smith, L
- Sober, D
- Sokhan, D
- Stepanyan, S
- Stepanyan, S
- Stoler, P
- Strakovsky, I
- Strauch, S
- Tang, W
- Taylor, C
- Tian, Y
- Tkachenko, S
- Trivedi, A
- Ungaro, M
- Vineyard, M
- Voskanyan, H
- Voutier, E
- Walford, N
- Wood, M
- Zachariou, N
- Zhao, Z
- Zonta, I.
- D'ANGELO, ANNALISA
DOIAbstract
The transition helicity amplitudes from the proton ground state to the P-11(1440) and D-13(1520) excited states (gamma(v)pN* electrocouplings) were determined from the analysis of nine independent one-fold differential pi(+)pi(-)p electroproduction cross sections off a proton target, taken with CLAS at photon virtualities of 0.25 < Q(2) < 0.60 GeV2. The phenomenological reaction model was employed for separation of the resonant and nonresonant contributions to the final state. The P-11(1440) and D-13(1520) electrocouplings were obtained from the resonant amplitudes parametrized within the framework of a unitarized Breit-Wigner ansatz. They are consistent with results obtained in the previous CLAS analyses of the pi(+)n and pi(0)p channels. ...
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