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Measurements of the γvp→p′π+π- cross section with the CLAS detector for 0.4 GeV2<Q2<1.0 GeV2 and 1.3 GeV<W<1.825 GeV
Journal
Physical Review C
Date Issued
2018-08-21
Author(s)
Fedotov, G. V.
Skorodumina, Iu A.
Burkert, V. D.
Gothe, R. W.
Hicks, K.
Mokeev, V. I.
Adhikari, S.
Armstrong, Whitney R.
Avakian, H.
Ball, J.
Balossino, I.
Barion, L.
Bashkanov, M.
Battaglieri, M.
Batourine, V.
Bedlinskiy, I.
Biselli, A. S.
Boiarinov, S.
Briscoe, W. J.
Carman, D. S.
Celentano, A.
Charles, G.
Chetry, T.
Ciullo, G.
Clary, Brandon A.
Cole, P. L.
Contalbrigo, M.
Cortes, O.
D'Angelo, A.
Dashyan, N.
De Vita, R.
De Sanctis, E.
Defurne, M.
Deur, A.
Djalali, C.
Dupre, R.
Egiyan, H.
Fassi, L. El
Eugenio, P.
Fersch, R.
Gavalian, G.
Ghandilyan, Y.
Gilfoyle, G. P.
Girod, F. X.
Golovatch, E.
Griffioen, K. A.
Guo, L.
Hafidi, K.
Hanretty, C.
Harrison, N.
Hattawy, M.
Heddle, D.
Holtrop, M.
Ilieva, Y.
Ireland, D. G.
Ishkhanov, B. S.
Isupov, E. L.
Jenkins, D.
Jo, H. S.
Johnston, S.
Joosten, S.
Kabir, M. L.
Keller, D.
Khachatryan, G.
Khachatryan, M.
Khandaker, M.
Kim, A.
Kim, W.
Klein, A.
Klein, F. J.
Kubarovsky, V.
Lanza, L.
Lenisa, P.
Livingston, K.
MacGregor, I. J.D.
Markov, N.
McKinnon, B.
Montgomery, R. A.
Camacho, C. Munoz
Nadel-Turonski, P.
Niccolai, S.
Niculescu, G.
Osipenko, M.
Paolone, M.
Paremuzyan, R.
Park, K.
Pasyuk, E.
Pogorelko, O.
Price, J. W.
Procureur, S.
Prok, Y.
Protopopescu, D.
Ripani, M.
Riser, D.
Ritchie, B. G.
Rizzo, A.
Abstract
New results on the single-differential and fully integrated cross sections for the process γvp → p
π+π− are
presented. The experimental data were collected with the CLAS detector at Jefferson Laboratory. Measurements
were carried out in the kinematic region of the reaction invariant mass W from 1.3 to 1.825 GeV and the photon
virtuality Q2 from 0.4 to 1.0 GeV2
. The cross sections were obtained in narrow Q2 bins (0.05 GeV2
) with the
smallest statistical uncertainties achieved in double-pion electroproduction experiments to date. The results were
found to be in agreement with previously available data where they overlap. A preliminary interpretation of
the extracted cross sections, which was based on a phenomenological meson-baryon reaction model, revealed
substantial relative contributions from nucleon resonances. The data offer promising prospects to improve
knowledge on the Q2 evolution of the electrocouplings of most resonances with masses up to ∼1.8 GeV.
π+π− are
presented. The experimental data were collected with the CLAS detector at Jefferson Laboratory. Measurements
were carried out in the kinematic region of the reaction invariant mass W from 1.3 to 1.825 GeV and the photon
virtuality Q2 from 0.4 to 1.0 GeV2
. The cross sections were obtained in narrow Q2 bins (0.05 GeV2
) with the
smallest statistical uncertainties achieved in double-pion electroproduction experiments to date. The results were
found to be in agreement with previously available data where they overlap. A preliminary interpretation of
the extracted cross sections, which was based on a phenomenological meson-baryon reaction model, revealed
substantial relative contributions from nucleon resonances. The data offer promising prospects to improve
knowledge on the Q2 evolution of the electrocouplings of most resonances with masses up to ∼1.8 GeV.
Subjects
