Measurement E213M1172

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	0.1966	0.0161	0.0487	0.0512
54.0	0.216	0.0173	0.0516	0.0545
90.0	0.3031	0.032	0.0636	0.0712
126.0	0.3201	0.0191	0.0642	0.067
162.0	0.4062	0.0218	0.0721	0.0754
198.0	0.4192	0.0248	0.0741	0.0781
234.0	0.3302	0.0227	0.0657	0.0695
270.0	0.2729	0.0274	0.0608	0.0667
306.0	0.2152	0.0175	0.0511	0.0541
342.0	0.1886	0.0138	0.048	0.0499

CLAS Physics Database