CLAS Physics Database

Measurement E213M345

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: 1.925 — 1.95 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.9295 0.0452 0.1702 0.2438
54.0 0.9413 0.049 0.1329 0.1997
90.0 0.9543 0.0461 0.1255 0.171
126.0 0.8862 0.058 0.1187 0.1321
162.0 1.0193 0.0579 0.1262 0.187
198.0 0.9672 0.0493 0.1205 0.1767
234.0 0.9714 0.049 0.1246 0.1794
270.0 0.9924 0.0439 0.1283 0.1356
306.0 0.8449 0.0517 0.1244 0.1812
342.0 0.9292 0.0503 0.1695 0.2436