CLAS Physics Database

Measurement E213M372

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: 2.0 — 2.025 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(p), [deg] dσ/dψ(p), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.8008 0.0398 0.1665 0.1712
54.0 0.8498 0.0444 0.1355 0.1426
90.0 0.8386 0.0429 0.1269 0.1339
126.0 0.8859 0.045 0.1335 0.1409
162.0 0.9482 0.0514 0.1354 0.1448
198.0 1.0379 0.0607 0.1413 0.1538
234.0 0.8719 0.0426 0.1308 0.1376
270.0 0.8195 0.0508 0.1242 0.1342
306.0 0.8285 0.0452 0.1324 0.1399
342.0 0.8321 0.0476 0.1648 0.1716