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

CLAS Collaboration

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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.

Original languageEnglish (US)
Article number025203
JournalPhysical Review C
Volume98
Issue number2
DOIs
StatePublished - Aug 21 2018

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detectors
cross sections
baryons
pions
kinematics
mesons
photons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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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. / CLAS Collaboration.

In: Physical Review C, Vol. 98, No. 2, 025203, 21.08.2018.

Research output: Contribution to journalArticle

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title = "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",
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.",
author = "{CLAS Collaboration} and Fedotov, {G. V.} and Skorodumina, {Iu A.} and Burkert, {V. D.} and Gothe, {R. W.} and K. Hicks and Mokeev, {V. I.} and S. Adhikari and Armstrong, {Whitney R.} and H. Avakian and J. Ball and I. Balossino and L. Barion and M. Bashkanov and M. Battaglieri and V. Batourine and I. Bedlinskiy and Biselli, {A. S.} and S. Boiarinov and Briscoe, {W. J.} and Brooks, {W. K.} and Carman, {D. S.} and A. Celentano and G. Charles and T. Chetry and G. Ciullo and Clary, {Brandon A.} and Cole, {P. L.} and M. Contalbrigo and O. Cortes and A. D'Angelo and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and M. Defurne and A. Deur and C. Djalali and R. Dupre and H. Egiyan and Fassi, {L. El} and P. Eugenio and R. Fersch and G. Gavalian and Y. Ghandilyan and Gilfoyle, {G. P.} and Girod, {F. X.} and E. Golovatch and Griffioen, {K. A.} and L. Guo and K. Hafidi and Barry Ritchie",
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T1 - 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

AU - CLAS Collaboration

AU - Fedotov, G. V.

AU - Skorodumina, Iu A.

AU - Burkert, V. D.

AU - Gothe, R. W.

AU - Hicks, K.

AU - Mokeev, V. I.

AU - Adhikari, S.

AU - Armstrong, Whitney R.

AU - Avakian, H.

AU - Ball, J.

AU - Balossino, I.

AU - Barion, L.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Carman, D. S.

AU - Celentano, A.

AU - Charles, G.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clary, Brandon A.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - D'Angelo, A.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Defurne, M.

AU - Deur, A.

AU - Djalali, C.

AU - Dupre, R.

AU - Egiyan, H.

AU - Fassi, L. El

AU - Eugenio, P.

AU - Fersch, R.

AU - Gavalian, G.

AU - Ghandilyan, Y.

AU - Gilfoyle, G. P.

AU - Girod, F. X.

AU - Golovatch, E.

AU - Griffioen, K. A.

AU - Guo, L.

AU - Hafidi, K.

AU - Ritchie, Barry

PY - 2018/8/21

Y1 - 2018/8/21

N2 - 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.

AB - 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.

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