CLAS Physics Database

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Measurement E151M1010

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

Q² :	0.5925 GeV²
W :	1385 GeV
ε :	0.9026
E_beam :	2.999 GeV
ε_L:	0.7085

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_UL,
Plot measurement data

Parameter (X axis): φ(π⁺), degrees

Click here to get data in text file, delimited with tabs.

Measured data:

cos(θ_π⁺)	φ(π⁺), degrees	A_UL	Stat. error	Syst. error
0.55	78	0.7659	0.7783	0.0635
0.55	90	-0.6799	0.6759	0.058
0.55	270	-0.7038	0.6358	0.0595
0.65	78	-0.881	0.6564	0.071
0.65	90	-0.7964	0.6384	0.0655
0.65	102	0.6219	0.8748	0.0545
0.65	258	-0.8057	0.6375	0.0661
0.75	78	0.0813	0.7639	0.0306
0.75	90	-0.2445	0.6245	0.0349
0.75	102	0.6387	0.8694	0.0555
0.75	258	0.2826	0.8353	0.0364
0.75	282	-0.5788	0.6587	0.0519
0.75	294	0.2226	0.7132	0.0341
0.85	78	0.0042	0.7745	0.03
0.85	90	1.5304	0.8972	0.1158
0.85	102	-0.636	0.6545	0.0553
0.85	114	-0.7121	0.6697	0.0601
0.85	222	-0.8884	0.6101	0.0715
0.85	234	-0.1245	0.7046	0.0313
0.85	246	-0.1755	0.6488	0.0326
0.85	270	0.1029	0.7062	0.0309
0.85	282	-0.6215	0.5049	0.0544
0.85	294	-0.6127	0.5597	0.0539
0.85	306	-0.7933	0.5076	0.0653
0.85	318	-0.5639	0.5799	0.051
0.85	330	-0.3573	0.6477	0.0398
0.95	222	-0.0667	0.7132	0.0304
0.95	258	0.6392	0.7548	0.0555
0.95	270	0.2169	0.6276	0.0339
0.95	282	0.2851	0.6978	0.0365