CLAS Physics Database

Measurement E213M362

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: 2.0 — 2.4 GeV2
W: 1.975 — 2.0 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π+), [deg] dσ/dψ(π+), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.8151 0.0391 0.1395 0.1449
54.0 0.8046 0.0428 0.1444 0.1506
90.0 0.8872 0.05 0.1567 0.1645
126.0 0.9493 0.0542 0.1601 0.169
162.0 1.1119 0.0442 0.1734 0.2458
198.0 1.172 0.0572 0.1769 0.2504
234.0 1.0254 0.0519 0.1652 0.1732
270.0 0.9353 0.0578 0.16 0.1701
306.0 0.8132 0.0392 0.1439 0.1491
342.0 0.7871 0.0422 0.1361 0.1425