CLAS Physics Database

Measurement E213M525

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: 2.4 — 3.0 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 0.9849 0.0504 0.1894 0.1959
54.0 0.9331 0.0386 0.144 0.2069
90.0 0.9786 0.0496 0.1384 0.147
126.0 1.0251 0.0439 0.1404 0.1471
162.0 1.1019 0.0468 0.1461 0.1534
198.0 1.0827 0.0478 0.1433 0.1511
234.0 0.9643 0.0408 0.1327 0.1389
270.0 0.9951 0.0437 0.1407 0.1473
306.0 1.0115 0.0473 0.1533 0.2126
342.0 1.033 0.0669 0.1959 0.207