Measurement E213M1189

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:	2.1 — 2.125 GeV
E_beam:	5.754 GeV

Measurement data
ψ(π⁻), [deg]	dσ/dψ(π⁻), [μb/rad]	uncertainty	syst. uncert.	total uncert.
18.0	0.146	0.0142	0.0368	0.0394
54.0	0.1389	0.0206	0.0292	0.0357
90.0	0.1954	0.0125	0.0357	0.0378
126.0	0.297	0.0265	0.0464	0.0534
162.0	0.3911	0.024	0.0532	0.0584
198.0	0.3577	0.0239	0.0498	0.0553
234.0	0.2935	0.0249	0.0457	0.052
270.0	0.227	0.0164	0.0383	0.0416
306.0	0.1744	0.0183	0.0318	0.0367
342.0	0.138	0.0159	0.0361	0.0394

CLAS Physics Database