CLAS Physics Database

Measurement E213M677

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 0.1702 0.0163 0.0459 0.0488
54.0 0.1837 0.018 0.0476 0.0509
90.0 0.1753 0.017 0.0462 0.0493
126.0 0.2079 0.0182 0.051 0.0541
162.0 0.2029 0.0187 0.05 0.0772
198.0 0.2366 0.0191 0.0551 0.0808
234.0 0.2 0.0168 0.0497 0.0525
270.0 0.154 0.014 0.0425 0.0448
306.0 0.1853 0.0148 0.048 0.0502
342.0 0.1654 0.0155 0.0452 0.0477