Electroproduction of p π⁺π⁻ off protons at 0.2 < Q² < 0.6 GeV² and 1.3 < W < 1.57 GeV with the CLAS detector

Authors

M. J. Amaryan, Old Dominion UniversityFollow
H. Baghdasaryan, Old Dominion University
M. Bektasoglu, Old Dominion University
S. Bültmann, Old Dominion UniversityFollow
S. L. Careccia, Old Dominion University
G. E. Dodge, Old Dominion UniversityFollow
G. Gavalian, Old Dominion University
N. Guler, Old Dominion University
C. E. Hyde, Old Dominion UniversityFollow
W. Kim, Old Dominion University
A. Klein, Old Dominion University
F. J. Klein, Old Dominion University
A. Klimenko, Old Dominion University
S. E. Kuhn, Old Dominion UniversityFollow
S. Tkachenko, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
et al.
CLAS Collaboration

Document Type

Article

Publication Date

2009

DOI

10.1103/PhysRevC.79.015204

Publication Title

Physical Review C

Volume

79

Issue

1

Pages

1-23

Abstract

This paper reports on the most comprehensive data set obtained on differential and fully integrated cross sections for the process ep → e'pπ⁺π^-. The data were collected with the CLAS detector at Jefferson Laboratory. Measurements were carried out in the as yet unexplored kinematic region of photon virtuality 0.2 < Q² < 0.6 GeV² and invariant mass of the final hadron system W from 1.3 to 1.57 GeV. For the first time, nine independent one-fold differential cross sections were determined in each bin of W and Q² covered by the measurements. A phenomenological analysis of the data allowed us to establish the most significant mechanisms contributing to the reaction. The nonresonant 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)P₁₁ and N(1520)D₁₃ states in kinematic dependencies of the one-fold differential cross sections.

Comments

© 2009 The American Physical Society

"Yes, the author or the author's employer may use all or part of the APS published article, including the APS-prepared version (e.g., the PDF from the online journal) without revision or modification, on the author's or employer's website as long as a fee is not charged. If a fee is charged, then APS permission must be sought. In all cases, the appropriate bibliographic citation and notice of the APS copyright must be included."

Publisher's version available at: https://doi.org/10.1103/PhysRevC.79.015204.

Original Publication Citation

Amaryan, M. J., Bültmann, S., Dodge, G.E., Hyde, C.E., Kuhn, S.E., et al., CLAS Collaboration (2009). Electroproduction of p π⁺π⁻ off protons at 0.2 < Q² < 0.6 GeV² and 1.3 < W < 1.57 GeV with the CLAS detector. Physical Review C, 79(1), 1-23, Article 015204. https://doi.org/10.1103/PhysRevC.79.015204

ORCID

0000-0003-1582-2376 (Dodge), 0000-0001-7282-8120 (Hyde), 0000-0003-2243-6836 (Kuhn)

Repository Citation

Amaryan, M. J.; Baghdasaryan, H.; Bektasoglu, M.; Bültmann, S.; Careccia, S. L.; Dodge, G. E.; Gavalian, G.; Guler, N.; Hyde, C. E.; Kim, W.; Klein, A.; Klein, F. J.; Klimenko, A.; Kuhn, S. E.; Tkachenko, S.; Weinstein, L. B.; et al.; and CLAS Collaboration, "Electroproduction of p π⁺π⁻ off protons at 0.2 < Q² < 0.6 GeV² and 1.3 < W < 1.57 GeV with the CLAS detector" (2009). Physics Faculty Publications. 482.
https://digitalcommons.odu.edu/physics_fac_pubs/482