CLAS Physics Database

Measurement E213M605

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: 1.925 — 1.95 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π+), [deg] dσ/dψ(π+), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.6183 0.0293 0.1047 0.1513
54.0 0.6297 0.0381 0.1084 0.1149
90.0 0.6608 0.0331 0.113 0.1599
126.0 0.79 0.0351 0.1265 0.1313
162.0 0.9545 0.0702 0.142 0.1995
198.0 0.8724 0.0391 0.1335 0.1928
234.0 0.8403 0.0451 0.131 0.1386
270.0 0.6832 0.0392 0.1149 0.1655
306.0 0.5631 0.0257 0.1019 0.1051
342.0 0.5992 0.0302 0.1028 0.1436