CLAS Physics Database

Measurement E213M676

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(π)
Q2: 3.0 — 3.5 GeV2
W: 1.4 — 1.425 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π), [deg] dσ/dψ(π), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.1624 0.0164 0.063 0.0651
54.0 0.1416 0.0143 0.0457 0.0479
90.0 0.1672 0.0162 0.0439 0.0468
126.0 0.1659 0.0147 0.0408 0.0433
162.0 0.1991 0.0171 0.0443 0.0475
198.0 0.1861 0.0161 0.0419 0.0449
234.0 0.1762 0.0153 0.0427 0.0454
270.0 0.1559 0.0162 0.0423 0.0453
306.0 0.1553 0.0158 0.048 0.0505
342.0 0.1367 0.0111 0.0594 0.0604