CLAS Physics Database

Measurement E151M3132

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: ALU
εL: 0.0516
Q2: 0.0707 GeV2
W: 1655.0 GeV
Ebeam: 1.9889 GeV
ε: 0.7705

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALU uncertainty
0.35 78.0 -0.0185 0.2703
0.45 270.0 -0.13 0.2691
0.45 282.0 0.2529 0.2424
0.55 222.0 0.3845 0.2581
0.65 126.0 -0.3785 0.2417
0.65 138.0 -0.1082 0.2689
0.65 210.0 0.2034 0.2635
0.65 222.0 -0.3117 0.24
0.65 282.0 -0.019 0.2195
0.75 66.0 0.5185 0.2644
0.75 114.0 0.4665 0.2461
0.75 198.0 -0.2979 0.27
0.75 210.0 -0.3223 0.2069
0.75 222.0 -0.0241 0.2659
0.75 270.0 -0.031 0.2543
0.75 282.0 0.0174 0.2351
0.75 294.0 0.0275 0.2737
0.85 114.0 -0.2812 0.2183
0.85 126.0 -0.0267 0.2123
0.85 198.0 -0.2668 0.2526
0.85 210.0 -0.2889 0.222
0.85 222.0 0.2721 0.2746
0.85 234.0 -0.0761 0.2278