CLAS Physics Database

Measurement E213M560

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: 2.4 — 3.0 GeV2
W: 1.8 — 1.825 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π+), [deg] dσ/dψ(π+), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.7049 0.0348 0.1092 0.1514
54.0 0.653 0.0435 0.1058 0.1144
90.0 0.7764 0.0449 0.1178 0.1261
126.0 0.8235 0.0393 0.1233 0.1787
162.0 0.8902 0.0599 0.1293 0.1833
198.0 0.8619 0.0431 0.1261 0.1763
234.0 0.8107 0.0418 0.1223 0.1727
270.0 0.6821 0.036 0.1102 0.1159
306.0 0.6717 0.0399 0.1069 0.1141
342.0 0.6133 0.0255 0.0995 0.1451