CLAS Physics Database

Measurement E213M794

Experiment: E1-6, 2025
Year: 2001

Measurement comment:

The angle ψ is the angle between the plane defined by the three-momenta of the hadron (in parentheses) and the target proton, and the plane defined by the three-momenta of the other two final-state hadrons

Experiment comment:

Experiment year: 2001—2002
Spokespersons: R.W. Gothe, A. Trivedi
Reaction: ep → π+πp
Polarization: none
Quantity: dσ/dψ(π+)
Q2: 3.0 — 3.5 GeV2
W: 1.725 — 1.75 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π+), [deg] dσ/dψ(π+), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6073 0.0324 0.0827 0.0888
54.0 0.5307 0.0327 0.0767 0.0834
90.0 0.6218 0.0371 0.0854 0.0931
126.0 0.6538 0.0342 0.0893 0.0956
162.0 0.6904 0.0389 0.0914 0.0993
198.0 0.7679 0.0421 0.0978 0.1064
234.0 0.852 0.0732 0.105 0.128
270.0 0.6676 0.0385 0.0899 0.0978
306.0 0.6161 0.0339 0.0841 0.0907
342.0 0.6112 0.0337 0.0825 0.0891