Measurement E213M874

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:	3.0 — 3.5 GeV²
W:	1.95 — 1.975 GeV
E_beam:	5.754 GeV

Measurement data
ψ(π⁻), [deg]	dσ/dψ(π⁻), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.3481	0.0211	0.0728	0.0758
54.0	0.3754	0.0259	0.0556	0.0613
90.0	0.4716	0.0309	0.0667	0.0735
126.0	0.5746	0.0386	0.078	0.087
162.0	0.6331	0.055	0.0824	0.0991
198.0	0.6662	0.0421	0.0867	0.0964
234.0	0.6113	0.0388	0.0817	0.0905
270.0	0.5048	0.0373	0.0692	0.0786
306.0	0.3858	0.0319	0.0571	0.0654
342.0	0.3428	0.0238	0.0717	0.0756

CLAS Physics Database