CLAS Physics Database

Measurement E213M264

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(p)
Q2: 2.0 — 2.4 GeV2
W: 1.7 — 1.725 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 1.4584 0.0784 0.2811 0.2918
54.0 1.395 0.066 0.2092 0.2194
90.0 1.1975 0.0568 0.1732 0.1823
126.0 1.4331 0.0742 0.1857 0.1999
162.0 1.5765 0.0741 0.1922 0.206
198.0 1.5529 0.0684 0.1918 0.2036
234.0 1.4622 0.0641 0.1887 0.1993
270.0 1.4442 0.0672 0.1941 0.2054
306.0 1.515 0.0671 0.2213 0.2312
342.0 1.6352 0.0755 0.3003 0.3096