CLAS Physics Database

Measurement E151M3148

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: 0.0705
Q2: 0.1205 GeV2
W: 1685.0 GeV
Ebeam: 1.9889 GeV
ε: 0.7186

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] ALU uncertainty syst. uncert.
0.45 270.0 0.49 0.2518 0.0316
0.55 270.0 0.0301 0.2617 0.03
0.65 138.0 -0.7935 0.1689 0.0339
0.75 210.0 -0.2429 0.2667 0.0304
0.75 222.0 -0.362 0.2563 0.0309
0.75 282.0 -0.2322 0.2557 0.0304
0.85 102.0 0.0285 0.2468 0.03
0.85 198.0 0.3624 0.2646 0.0309
0.85 234.0 -0.2989 0.2349 0.0306
0.85 246.0 -0.5006 0.2409 0.0316
0.95 234.0 -0.1877 0.274 0.0302