CLAS Physics Database

Measurement E151M474

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: AUL
εL: 0.352
Q2: 0.0496 GeV2
W: 1235.0 GeV
Ebeam: 1.9889 GeV
ε: 0.9717

Slice: cos(θπ+) =

Measurement data
cos(θπ+) φ(π+), [deg] AUL uncertainty syst. uncert.
0.45 78.0 -0.3429 0.3985 0.0366
0.55 78.0 1.066 0.456 0.0718
0.55 90.0 -0.0237 0.4261 0.03
0.55 270.0 -0.1863 0.5013 0.0321
0.65 90.0 -0.3707 0.4988 0.0376
0.65 246.0 -0.5282 0.442 0.0441
0.65 258.0 -0.4381 0.3349 0.0402
0.65 270.0 -0.1143 0.404 0.0308
0.75 114.0 0.7664 0.5593 0.0557
0.75 126.0 0.0449 0.4784 0.0301
0.75 138.0 1.6757 0.4176 0.1068
0.75 234.0 0.1209 0.5637 0.0309
0.75 246.0 -0.0767 0.3649 0.0304
0.75 258.0 -0.2149 0.3438 0.0328
0.75 270.0 0.3829 0.3724 0.0381
0.85 114.0 0.0558 0.454 0.0302
0.85 126.0 -0.1389 0.3487 0.0312
0.85 138.0 -0.0065 0.3593 0.03
0.85 150.0 -0.2637 0.3392 0.0341
0.85 162.0 -0.2599 0.3996 0.034
0.85 174.0 0.3081 0.4228 0.0354
0.85 186.0 -0.2406 0.4498 0.0334
0.85 234.0 -0.4357 0.4101 0.0401
0.85 246.0 0.4741 0.4364 0.0417
0.85 258.0 -0.4208 0.434 0.0395
0.95 126.0 0.7171 0.4947 0.0531
0.95 150.0 0.306 0.4353 0.0354
0.95 162.0 -0.2637 0.3954 0.0341
0.95 174.0 0.3709 0.5048 0.0376
0.95 186.0 0.4218 0.4511 0.0396