CLAS Physics Database

Measurement E213M543

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: 1.75 — 1.775 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.7693 0.0471 0.1266 0.135
54.0 0.7958 0.039 0.0992 0.1066
90.0 0.8103 0.0354 0.0937 0.1002
126.0 0.7883 0.0391 0.0896 0.0978
162.0 0.7746 0.0516 0.0857 0.1
198.0 0.817 0.0394 0.0892 0.0976
234.0 0.7221 0.1583 0.0815 0.1781
270.0 0.7409 0.0321 0.0875 0.0932
306.0 0.8006 0.0404 0.0991 0.107
342.0 0.8169 0.0383 0.1311 0.1365