Measurement E213M1090

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:	1.825 — 1.85 GeV
E_beam:	5.754 GeV

Measurement data
ψ(π⁻), [deg]	dσ/dψ(π⁻), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.2834	0.0208	0.057	0.0607
54.0	0.3429	0.0269	0.0467	0.0539
90.0	0.348	0.026	0.0475	0.0542
126.0	0.379	0.0286	0.0515	0.0589
162.0	0.4237	0.0323	0.0532	0.0623
198.0	0.4318	0.0339	0.0546	0.0643
234.0	0.3586	0.0345	0.0498	0.0606
270.0	0.3188	0.0233	0.0442	0.05
306.0	0.2925	0.0248	0.0422	0.049
342.0	0.2722	0.0339	0.0564	0.0658

CLAS Physics Database