CLAS Physics Database

Measurement E151M2870

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: 0.0215
Q2: 0.0245 GeV2
W: 1565.0 GeV
Ebeam: 1.3383 GeV
ε: 0.6351

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALU uncertainty
0.45 30.0 -0.187 0.255
0.45 42.0 -0.2372 0.1918
0.55 138.0 -0.25 0.3449
0.55 150.0 0.1181 0.3502
0.55 162.0 -0.0621 0.2519
0.55 210.0 0.5391 0.2855
0.55 222.0 -0.3663 0.1732
0.55 234.0 0.4974 0.2871
0.65 150.0 0.2477 0.3928
0.65 210.0 -0.1914 0.3333
0.65 222.0 -0.4071 0.3672
0.65 234.0 -0.061 0.387
0.75 222.0 0.1063 0.3125
0.75 234.0 0.5225 0.3358
0.75 246.0 0.1544 0.3803
0.85 222.0 -0.1731 0.3434
0.85 234.0 -0.3087 0.355
0.85 246.0 0.1632 0.3385
0.55 246.0 0.2851 0.2617
0.65 138.0 0.1081 0.2635
0.65 150.0 -0.0417 0.2701
0.65 222.0 0.0445 0.2335
0.75 138.0 0.1076 0.2555
0.75 210.0 -0.2741 0.264
0.75 222.0 0.2124 0.2554
0.75 234.0 -0.0984 0.264
0.75 246.0 -0.2997 0.2414
0.85 210.0 0.4098 0.2632
0.85 222.0 0.3158 0.254
0.85 234.0 -0.4289 0.2073
0.85 246.0 -0.3661 0.2315