Measurement E213M1137

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⁺π⁻p
Polarization:	none
Quantity:	dσ/dψ(p)
Q²:	3.5 — 4.2 GeV²
W:	1.95 — 1.975 GeV
E_beam:	5.754 GeV

Measurement data
ψ(p), [deg]	dσ/dψ(p), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.3286	0.0351	0.0834	0.0905
54.0	0.3545	0.0354	0.0734	0.0814
90.0	0.33	0.0208	0.0684	0.0715
126.0	0.336	0.0347	0.0709	0.0789
162.0	0.3557	0.0239	0.0723	0.0762
198.0	0.3427	0.0209	0.0709	0.0739
234.0	0.3045	0.0237	0.0677	0.0717
270.0	0.329	0.0209	0.0683	0.0715
306.0	0.2873	0.0186	0.0635	0.0662
342.0	0.33	0.0293	0.0823	0.0874

CLAS Physics Database