CLAS Physics Database

Measurement E213M336

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: 1.9 — 1.925 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.9174 0.0518 0.1776 0.2471
54.0 0.9418 0.0655 0.1411 0.1556
90.0 1.006 0.0468 0.1365 0.1443
126.0 0.966 0.0511 0.1329 0.1866
162.0 1.0307 0.0548 0.1339 0.19
198.0 0.9284 0.0479 0.124 0.1781
234.0 0.9718 0.0498 0.1324 0.1926
270.0 1.047 0.0555 0.1404 0.1509
306.0 1.0079 0.0493 0.1488 0.1568
342.0 0.9341 0.0553 0.1788 0.2575