CLAS Physics Database

Measurement E213M660

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: 2.4 — 3.0 GeV2
W: 2.075 — 2.1 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.5539 0.0357 0.1153 0.1207
54.0 0.4684 0.0226 0.0857 0.0886
90.0 0.5476 0.0337 0.0891 0.0953
126.0 0.4964 0.024 0.0875 0.0907
162.0 0.6076 0.0337 0.0982 0.1039
198.0 0.6554 0.0318 0.1028 0.1076
234.0 0.5151 0.027 0.088 0.092
270.0 0.4934 0.0284 0.0842 0.0889
306.0 0.5423 0.0348 0.0934 0.0997
342.0 0.523 0.0323 0.1109 0.1155