Measurement E213M1153

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:	2.0 — 2.025 GeV
E_beam:	5.754 GeV

Measurement data
ψ(π⁻), [deg]	dσ/dψ(π⁻), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.2281	0.0312	0.0492	0.0583
54.0	0.234	0.0213	0.0392	0.0446
90.0	0.3106	0.0272	0.051	0.0578
126.0	0.3662	0.0316	0.0574	0.0655
162.0	0.4452	0.0321	0.0645	0.0721
198.0	0.4857	0.03	0.0686	0.0748
234.0	0.3845	0.0366	0.0593	0.0697
270.0	0.3038	0.0361	0.0498	0.0615
306.0	0.2225	0.0207	0.0378	0.0431
342.0	0.2024	0.0145	0.0466	0.0488

CLAS Physics Database