CLAS Physics Database

Measurement E213M524

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: 1.7 — 1.725 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π+), [deg] dσ/dψ(π+), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.9574 0.0519 0.1611 0.1693
54.0 0.9102 0.0452 0.1579 0.2214
90.0 0.9974 0.0436 0.1698 0.1753
126.0 1.1297 0.059 0.1865 0.1956
162.0 1.1461 0.054 0.1874 0.1951
198.0 1.1646 0.0471 0.1894 0.1952
234.0 1.0252 0.0453 0.1734 0.1793
270.0 1.0285 0.0466 0.1726 0.1788
306.0 0.8722 0.0408 0.1535 0.2152
342.0 1.0108 0.0407 0.1683 0.1732