CLAS Physics Database

Measurement E151M648

Experiment: EG4
Year: 2016

Experiment comment:

Final asymmetry results for the ep-> e pi+ (n) channel extracted from CLAS/EG4 data obtained using a longitudinally polarized beam and a longitudinally polarized NH3 target (CAA HS07-02).
Spokesperson: Xiaochao Zheng
Reaction: ep → π+n
Polarization: beam (longitudinal), target (longitudinal)
Quantity: AUL
εL: 0.1805
Q2: 0.205 GeV2
W: 1565.0 GeV
Ebeam: 1.9889 GeV
ε: 0.7866

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] AUL uncertainty
0.65 114.0 -0.7746 0.6971
0.65 126.0 -1.5066 0.6282
0.65 222.0 1.2022 0.8543
0.65 294.0 1.0132 0.7764
0.75 102.0 -0.6493 0.7333
0.75 126.0 0.8283 0.7826
0.75 222.0 -0.2878 0.6587
0.75 246.0 0.432 0.7321
0.85 222.0 -0.2437 0.5895
0.85 234.0 1.1548 0.6252
0.85 246.0 1.4934 0.7289
0.85 258.0 0.2505 0.6431
0.85 270.0 -0.1437 0.7481
0.95 210.0 0.9386 0.7004
0.95 246.0 0.8901 0.6351
0.95 270.0 0.0077 0.599