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Measurement E151M8

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Experiment: EG4, 2016

Spokespersons: Xiaochao Zheng

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).

No publications available for this experiment

Quantity measured: AUL,
Target spin asymmetry.
Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π+n, polarization: none

Q2 : 0.0291 GeV2
W : 1205 GeV
ε : 0.9209
Ebeam : 1.0539 GeV
εL: 0.2619 

Select data slice:
cos(θπ+) =
Observable quantity measured (Y axis): AUL,
Plot measurement data

Parameter (X axis): φ(π+), degrees

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Measured data:

cos(θπ+) φ(π+),
degrees 		AUL Data errors Systematic errors
0.25 42 -0.0567 0.5072 0.0307
0.25 54 0.6296 0.5243 0.0777
0.35 54 -0.0997 0.5397 0.0321
0.55 258 0.0039 0.4002 0.03
0.55 270 0.0379 0.3708 0.0303
0.55 282 -0.0893 0.3804 0.0317
0.65 246 -0.2424 0.471 0.0407
0.65 258 0.2092 0.3246 0.0383
0.65 270 -0.0263 0.3165 0.0301
0.65 282 0.225 0.4569 0.0394
0.75 162 0.027 0.508 0.0302
0.75 174 0.2393 0.5092 0.0405
0.75 186 0.0064 0.5087 0.03
0.75 198 -0.1457 0.4869 0.0343
0.75 210 -0.6342 0.4056 0.0781
0.75 246 -0.4366 0.3947 0.058
0.75 258 0.4879 0.4133 0.0631
0.75 270 -0.6589 0.3608 0.0807
0.85 150 0.3331 0.5171 0.0483
0.85 162 0.3366 0.3977 0.0486
0.85 174 0.1686 0.292 0.0356
0.85 186 0.0692 0.352 0.031
0.85 198 0.309 0.4086 0.0462
0.85 210 0.0358 0.3892 0.0303
0.85 222 1.2466 0.4149 0.145