Measurement of target and double-spin asymmetries for the e- p- →eπ+(n) reaction in the nucleon resonance region at low Q2
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Pre-printDate
2016-10-19Author
Zheng, XAdhikari, KP
Bosted, P
Deur, A
Drozdov, V
El Fassi, L
Kang, H
Kovacs, K
Kuhn, S
Long, E
Phillips, SK
Ripani, M
Slifer, K
Smith, LC
Adikaram, D
Akbar, Z
Amaryan, MJ
Anefalos Pereira, S
Asryan, G
Avakian, H
Badui, RA
Ball, J
Baltzell, NA
Battaglieri, M
Batourine, V
Bedlinskiy, I
Biselli, AS
Briscoe, WJ
Bültmann, S
Burkert, VD
Carman, DS
Celentano, A
Chandavar, S
Charles, G
Chen, JP
Chetry, T
Choi, S
Ciullo, G
Clark, L
Colaneri, L
Cole, PL
Compton, N
Contalbrigo, M
Crede, V
D'Angelo, A
Dashyan, N
De Vita, R
De Sanctis, E
Djalali, C
Dodge, GE
Dupre, R
Egiyan, H
El Alaoui, A
Elouadrhiri, L
Eugenio, P
Fanchini, E
Fedotov, G
Fersch, R
Filippi, A
Fleming, JA
Gevorgyan, N
Ghandilyan, Y
Gilfoyle, GP
Giovanetti, KL
Girod, FX
Gleason, C
Golovach, E
Gothe, RW
Griffioen, KA
Guidal, M
Guler, N
Guo, L
Hanretty, C
Harrison, N
Hattawy, M
Hicks, K
Holtrop, M
Hughes, SM
Ilieva, Y
Ireland, DG
Ishkhanov, BS
Isupov, EL
Jenkins, D
Jiang, H
Jo, HS
Joosten, S
Keller, D
Khachatryan, G
Khandaker, M
Kim, A
Kim, W
Klein, FJ
Kubarovsky, V
Lanza, L
Lenisa, P
Livingston, K
MacGregor, IJD
Markov, N
McKinnon, B
Mirazita, M
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http://hdl.handle.net/20.500.12613/5003
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10.1103/PhysRevC.94.045206Abstract
© 2016 American Physical Society. We report measurements of target- and double-spin asymmetries for the exclusive channel e - p - →eπ+(n) in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH3 target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3, and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low Q2 range from 0.0065 to 0.35(GeV/c)2. The Q2 access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as 6. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID, and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models.Citation to related work
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http://dx.doi.org/10.34944/dspace/4985