CLAS Physics Database

Measurement E213M156

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+πp
Polarization: none
Quantity: dσ/dψ(p)
Q2: 2.0 — 2.4 GeV2
W: 1.4 — 1.425 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.3311 0.0111 0.1743 0.1746
54.0 0.3492 0.0217 0.1664 0.1678
90.0 0.3355 0.0142 0.1546 0.1553
126.0 0.3803 0.0176 0.1499 0.1509
162.0 0.3599 0.026 0.1391 0.1415
198.0 0.3786 0.0176 0.1425 0.1436
234.0 0.3829 0.0175 0.149 0.15
270.0 0.353 0.0157 0.1574 0.1582
306.0 0.3369 0.0128 0.1658 0.1663
342.0 0.3179 0.0098 0.1717 0.172