Title

Beam-helicity asymmetries in double charged pion photoproduction on the proton

Authors

S. Strauch
Angela Biselli, Fairfield UniversityFollow
CLAS Collaboration

Document Type

Article

Article Version

Publisher's PDF

Publication Date

2005

Abstract

Beam-helicity asymmetries for the two-pion-photoproduction reaction gamma + p --> p pi+ pi- have been studied for the first time in the resonance region for center-of-mass energies between 1.35 GeV and 2.30 GeV. The experiment was performed at Jefferson Lab with the CEBAF Large Acceptance Spectrometer using circularly polarized tagged photons incident on an unpolarized hydrogen target. Beam-helicity-dependent angular distributions of the final-state particles were measured. The large cross-section asymmetries exhibit strong sensitivity to the kinematics and dynamics of the reaction. The data are compared with the results of various phenomenological model calculations, and show that these models currently do not provide an adequate description for the behavior of this new observable.

Comments

Copyright American Physical Society

Final Publisher version also available at http://prl.aps.org/abstract/PRL/v95/i16/e162003

Publication Title

Physical Review Letters

Repository Citation

Strauch, S.; Biselli, Angela; and CLAS Collaboration, "Beam-helicity asymmetries in double charged pion photoproduction on the proton" (2005). Physics Faculty Publications. 6.
https://digitalcommons.fairfield.edu/physics-facultypubs/6

Published Citation

S. Strauch et al. [CLAS Collaboration], "Beam-helicity asymmetries in double charged pion photoproduction on the proton", Phys. Rev. Lett. 95, 162003 (2005) DOI: 10.1103/PhysRevLett.95.162003

DOI

10.1103/PhysRevLett.95.162003

Peer Reviewed