CLAS Physics Database

Measurement E151M1883

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: ALL
εL: 0.1065
Q2: 0.1205 GeV2
W: 1595.0 GeV
Ebeam: 1.9889 GeV
ε: 0.7989

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALL uncertainty syst. uncert.
0.45 270.0 -1.2437 0.8635 0.0811
0.45 282.0 0.3456 0.9518 0.0366
0.45 294.0 -0.0923 0.9053 0.0305
0.55 114.0 -0.6047 0.9281 0.0474
0.55 126.0 0.2308 0.848 0.0331
0.55 282.0 -1.3773 0.9196 0.0887
0.65 114.0 0.5857 0.9483 0.0465
0.65 126.0 1.0261 0.9378 0.069
0.65 138.0 0.0737 1.0051 0.0303
0.65 294.0 -1.1554 0.739 0.0762
0.75 114.0 0.6235 0.9654 0.0482
0.75 126.0 0.317 0.9778 0.0356
0.75 198.0 0.7759 0.8981 0.0558
0.75 210.0 -1.4552 0.8151 0.0931
0.75 222.0 0.2372 0.8505 0.0333
0.75 234.0 0.5117 0.826 0.0431
0.75 246.0 -0.765 0.9302 0.0552
0.85 90.0 -1.7761 0.6858 0.1117
0.85 222.0 -0.9801 0.737 0.0665
0.85 234.0 -0.1521 0.6693 0.0314
0.95 114.0 -0.7837 0.8004 0.0562
0.95 222.0 -0.0272 0.7363 0.03
0.95 234.0 0.36 0.812 0.0371
0.95 258.0 -0.7984 0.7872 0.0569