CLAS Physics Database

Measurement E213M182

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: 2.0 — 2.4 GeV2
W: 1.475 — 1.5 GeV
Ebeam: 5.754 GeV

Measurement data
ψ(π+), [deg] dσ/dψ(π+), [μb/rad] uncertainty syst. uncert. total uncert.
18.0 0.7683 0.0358 0.163 0.1669
54.0 0.8028 0.0434 0.1658 0.1714
90.0 0.8609 0.0465 0.1719 0.178
126.0 0.9873 0.0782 0.1838 0.263
162.0 1.1493 0.0547 0.2012 0.287
198.0 1.1404 0.0742 0.1997 0.2856
234.0 1.0312 0.0855 0.1896 0.2653
270.0 0.8254 0.0407 0.1679 0.1728
306.0 0.7897 0.0414 0.1662 0.1713
342.0 0.8498 0.0416 0.1726 0.1776