CLAS Physics Database

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Measurement E151M155

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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 :	0.0348 GeV²
W :	1415 GeV
ε :	0.6858
E_beam :	1.0539 GeV
ε_L:	0.0628

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	Data errors	Systematic errors
0.25	42	-0.2047	0.5757	0.038
0.25	54	1.0069	0.8257	0.1184
0.35	30	0.2388	0.8172	0.0405
0.35	42	0.8644	0.649	0.1028
0.35	54	-0.7878	0.5326	0.0945
0.45	30	0.9084	0.865	0.1076
0.45	42	0.3844	0.56	0.053
0.45	54	-0.4415	0.6765	0.0585
0.45	234	0.0342	0.7163	0.0303
0.45	246	0.6212	0.7484	0.0768
0.45	258	-0.4915	0.7276	0.0635
0.55	42	0.3094	0.6781	0.0462
0.55	54	0.7132	0.8866	0.0865
0.55	150	0.4667	0.8126	0.061
0.55	222	-0.2926	0.7028	0.0448
0.55	234	0.6754	0.6398	0.0825
0.55	246	-0.0548	0.5515	0.0306
0.55	258	0.6103	0.6495	0.0756
0.65	138	1.4074	0.9342	0.1629
0.65	150	0.0349	0.6697	0.0303
0.65	162	0.0048	0.7881	0.03
0.65	222	0.6892	0.6311	0.084
0.65	234	-0.2059	0.4196	0.0381
0.65	246	0.001	0.4541	0.03
0.65	258	-0.0583	0.5305	0.0307
0.65	270	-0.1813	0.7826	0.0364
0.75	138	0.8841	0.7175	0.105
0.75	150	-0.3598	0.6661	0.0508
0.75	162	-1.5282	0.6219	0.1764
0.75	174	0.9023	0.7766	0.1069
0.75	210	-0.1846	0.7768	0.0366
0.75	222	0.2011	0.6335	0.0377
0.75	234	0.332	0.5788	0.0482
0.75	246	0.7993	0.4658	0.0958
0.75	258	-0.1996	0.4351	0.0376
0.75	270	-0.0138	0.6274	0.03
0.85	138	0.4593	0.8559	0.0602
0.85	150	-1.443	0.635	0.1669
0.85	222	-0.189	0.665	0.0369
0.85	234	-0.1632	0.4246	0.0353
0.85	246	-0.1564	0.4217	0.0349
0.85	258	0.0199	0.4562	0.0301
0.85	270	-0.5131	0.5409	0.0656
0.95	138	-0.5512	0.6011	0.0695
0.95	234	-0.4286	0.5525	0.0573
0.95	246	-1.0131	0.4435	0.1191
0.95	258	0.9701	0.6003	0.1144