Measurement E213M1109

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(π⁺)
Q²:	3.5 — 4.2 GeV²
W:	1.875 — 1.9 GeV
E_beam:	5.754 GeV

Measurement data
ψ(π⁺), [deg]	dσ/dψ(π⁺), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.3035	0.022	0.0591	0.0631
54.0	0.291	0.0206	0.0584	0.062
90.0	0.3726	0.0345	0.0695	0.0776
126.0	0.4011	0.0334	0.0737	0.081
162.0	0.5322	0.0438	0.0878	0.0981
198.0	0.5009	0.0319	0.0844	0.0902
234.0	0.4747	0.0531	0.0823	0.098
270.0	0.4324	0.0443	0.0766	0.0885
306.0	0.3479	0.0296	0.0654	0.0718
342.0	0.2927	0.0461	0.0576	0.0738

CLAS Physics Database