Helicity asymmetries in the gamma(pol.) p ---> pi+ pi- reaction
Conference
·
OSTI ID:955543
Beam-helicity asymmetries in the vec gammap ? p?+?- reaction have been measured at Jefferson Lab with the CEBAF Large Acceptance Spectrometer using circularly polarized tagged photons incident on an unpolarized hydrogen target. The experiment covered the resonance region for center-of-mass energies between 1.35 GeV and 2.30 GeV. Here, we show a few examples out of the comprehensive data set and demonstrate the sensitivity of the helicity asymmetries to the dynamics of the reaction by comparing with the results of various phenomenological model calculations.
- Research Organization:
- Thomas Jefferson Lab National Accelerator Facility
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 955543
- Report Number(s):
- JLAB-PHY-04-333; 6328920; DOE/ER/40150-4440
- Country of Publication:
- United States
- Language:
- English
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