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Measurement E151M12

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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 : 0.0593 GeV2
W : 1205 GeV
ε : 0.8959
Ebeam : 1.0539 GeV
εL: 0.4697 

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
0.45 282 0.5349 0.4438 0.0678
0.55 270 -0.6291 0.2852 0.0776
0.55 282 -0.0987 0.3499 0.032
0.65 258 -0.9585 0.3156 0.1131
0.65 270 -0.2229 0.3032 0.0393
0.65 282 -0.4175 0.3432 0.0562
0.75 258 -0.4712 0.3766 0.0614
0.75 270 0.5028 0.3742 0.0646
0.75 282 0.5265 0.4688 0.067
0.85 150 0.129 0.3759 0.0334
0.85 162 0.129 0.3869 0.0334
0.85 174 0.1521 0.3711 0.0346
0.85 186 -0.7393 0.2576 0.0893
0.85 198 -0.2427 0.3869 0.0408
0.85 210 0.0447 0.3477 0.0304
0.85 222 0.3356 0.3882 0.0486
0.85 246 -0.3397 0.4243 0.0489
0.85 258 0.1945 0.415 0.0373
0.95 150 0.1941 0.4024 0.0372
0.95 162 -0.1789 0.2971 0.0363
0.95 174 -0.046 0.2903 0.0305
0.95 186 -0.2847 0.3051 0.0441
0.95 198 0.1161 0.3331 0.0328
0.95 210 -0.1443 0.3763 0.0342
0.95 222 0.6071 0.3469 0.0753