CLAS Physics Database

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Measurement E151M686

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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 :	0.0496 GeV²
W :	1655 GeV
ε :	0.78
E_beam :	1.9889 GeV
ε_L:	0.0374

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
0.35	78	0.0689	0.727	0.0303
0.35	90	0.3419	0.7587	0.0366
0.35	270	-0.7068	0.6088	0.0526
0.45	78	-0.3689	0.5737	0.0375
0.45	90	0.5598	0.7976	0.0455
0.45	138	-0.0296	0.74	0.0301
0.45	258	0.9338	0.7673	0.0645
0.45	270	0.099	0.4923	0.0306
0.45	282	1.2671	0.6867	0.0831
0.55	114	-0.4434	0.6806	0.0404
0.55	126	-0.9241	0.6344	0.064
0.55	138	0.3798	0.6991	0.0379
0.55	210	0.9095	0.7908	0.0632
0.55	258	1.688	0.6579	0.1075
0.55	270	0.791	0.5591	0.0569
0.55	282	-0.9043	0.537	0.0629
0.65	138	0.2995	0.6521	0.0351
0.65	150	-0.7586	0.6301	0.0552
0.65	210	0.1076	0.6052	0.0307
0.65	222	1.6202	0.6081	0.1035
0.65	234	1.1953	0.7236	0.079
0.65	282	-0.4123	0.6404	0.0392
0.65	294	0.029	0.6567	0.0301
0.75	66	-0.0817	0.5864	0.0304
0.75	78	-0.3886	0.6006	0.0383
0.75	138	-0.1501	0.7246	0.0314
0.75	198	1.4918	0.5827	0.096
0.75	210	0.172	0.545	0.0318
0.75	222	0.6055	0.5041	0.0477
0.75	234	-0.4501	0.6075	0.0407
0.75	258	0.6389	0.6631	0.0493
0.75	270	0.1483	0.5206	0.0313
0.75	282	0.2714	0.4604	0.0343
0.75	294	-0.3042	0.5596	0.0353
0.85	102	0.7435	0.6753	0.0545
0.85	114	-1.0003	0.4784	0.0681
0.85	126	-0.2255	0.5883	0.033
0.85	198	1.7461	0.6363	0.1109
0.85	210	0.6226	0.6657	0.0485
0.85	222	-0.5082	0.4686	0.0432
0.85	234	0.7157	0.5941	0.0531
0.85	246	0.2791	0.6906	0.0345
0.95	222	-0.036	0.614	0.0301