Electroproduction of ppi+pi- off protons at 0.2<0.6 GeV^2 and 1.3 < W < 1.57 GeV with CLAS.

Fedotov, Gleb; Mokeev, Viktor; Burkert, Volker; Elouadrhiri, Latifa; Golovach, Evgeny; Ishkhanov, Boris; Isupov, Evgeny; Shvedunov, Nikolay

doi:10.1103/PhysRevC.79.015204

Title: Electroproduction of ppi+pi- off protons at 0.2<0.6 GeV^2 and 1.3 < W < 1.57 GeV with CLAS.

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.79.015204· OSTI ID:956210

Fedotov, Gleb; Mokeev, Viktor; Burkert, Volker; Elouadrhiri, Latifa; Golovach, Evgeny; Ishkhanov, Boris; Isupov, Evgeny; Shvedunov, Nikolay

This paper reports on the most comprehensive data set obtained on differential and fully integrated cross sections for the process $$e p \rightarrow e' p \pi^{+} \pi^{-} $$. The data were collected with the CLAS detector at Jefferson Laboratory. Measurements were carried out in the so-far unexplored kinematic region of photon virtuality 0.2 $$<$$ $$Q^{2}$$ $$<$$ 0.6 GeV$$^{2}$$ and invariant mass of the final hadron system $$W$$ from 1.3 to 1.57~GeV. For the first time, nine independent 1-fold differential cross sections were determined in each bin of $$W$$ and $$Q^{2}$$ covered by the measurements. A phenomenological analysis of the data allowed us to establish the most significant mechanisms contributing to the reaction. The non-resonant mechanisms account for a major part of cross-sections. However, we find sensitivity to s-channel excitations of low-mass nucleon resonances, especially to the $$N(1440)P_{11}$$ and $$N(1520)D_{13}$$ states in kinematical dependencies of the 1-fold

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-060R23177

OSTI ID:: 956210

Report Number(s):: JLAB-PHY-08-871; arXiv:0809.1562; DOE/OR/23177-0464; PRVCAN; TRN: US1004940

Journal Information:: Physical Review C, Vol. 79; ISSN 0556-2813

Country of Publication:: United States

Language:: English

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Title: Electroproduction of ppi+pi- off protons at 0.2<0.6 GeV^2 and 1.3 < W < 1.57 GeV with CLAS.

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