Measurement E213M1171

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:	2.05 — 2.075 GeV
E_beam:	5.754 GeV

Measurement data
ψ(π⁻), [deg]	dσ/dψ(π⁻), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.1558	0.0139	0.0431	0.0452
54.0	0.2046	0.0162	0.0398	0.0429
90.0	0.2179	0.0131	0.0452	0.047
126.0	0.3333	0.0282	0.0595	0.0658
162.0	0.4538	0.037	0.0712	0.0802
198.0	0.4437	0.0319	0.0695	0.0764
234.0	0.324	0.0435	0.0583	0.0727
270.0	0.2571	0.0175	0.0488	0.0518
306.0	0.214	0.0161	0.0403	0.0434
342.0	0.1926	0.031	0.0472	0.0565

CLAS Physics Database