Measurement E213M937

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:	1.4 — 1.425 GeV
E_beam:	5.754 GeV

Measurement data
ψ(π⁻), [deg]	dσ/dψ(π⁻), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.1064	0.0103	0.0505	0.0515
54.0	0.0921	0.0107	0.0386	0.0554
90.0	0.1246	0.014	0.0394	0.0561
126.0	0.1083	0.0112	0.0347	0.0365
162.0	0.1439	0.015	0.0393	0.042
198.0	0.1385	0.0137	0.0386	0.0409
234.0	0.1246	0.0129	0.0377	0.0398
270.0	0.1085	0.0124	0.0368	0.0517
306.0	0.106	0.011	0.041	0.0581
342.0	0.0851	0.0068	0.0463	0.0468

CLAS Physics Database