CLAS Physics Database

Measurement E151M3090

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: 0.1399
Q2: 0.1435 GeV2
W: 1565.0 GeV
Ebeam: 1.9889 GeV
ε: 0.8118

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALU uncertainty
0.45 282.0 0.2821 0.27
0.55 282.0 -0.0472 0.274
0.65 114.0 0.0297 0.2553
0.65 126.0 0.0917 0.2676
0.65 234.0 0.3628 0.2418
0.65 294.0 -0.2 0.2062
0.75 114.0 -0.1973 0.2401
0.75 126.0 0.3234 0.2489
0.75 138.0 0.4537 0.2389
0.75 198.0 0.4111 0.2454
0.75 210.0 0.0636 0.2351
0.75 222.0 0.1891 0.2172
0.75 234.0 -0.2216 0.2498
0.75 246.0 -0.1287 0.2702
0.75 294.0 -0.3781 0.245
0.85 90.0 0.318 0.2271
0.85 126.0 0.0813 0.2727
0.85 210.0 -0.043 0.2759
0.85 222.0 -0.0651 0.218
0.85 246.0 -0.1865 0.1937
0.85 258.0 -0.4849 0.2561
0.95 90.0 0.2878 0.2493
0.95 102.0 -0.0758 0.2827
0.95 222.0 0.1992 0.2639
0.95 234.0 -0.3106 0.251
0.95 246.0 -0.09 0.2791
0.95 258.0 -0.6738 0.1866