CLAS Physics Database

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Measurement E151M69

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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 :	0.0245 GeV²
W :	1295 GeV
ε :	0.8564
E_beam :	1.0539 GeV
ε_L:	0.1094

Select data slice:
cos(θ_π⁺) =

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

Parameter (X axis): φ(π⁺), degrees

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Measured data:

cos(θ_π⁺)	φ(π⁺), degrees	A_UL	Data errors	Systematic errors
0.25	42	-0.2525	0.5788	0.0415
0.25	54	0.5396	0.5055	0.0683
0.35	30	1.4325	0.5863	0.1657
0.35	42	0.1739	0.5376	0.0359
0.35	54	-0.0946	0.5655	0.0319
0.45	30	0.2893	0.5126	0.0445
0.45	42	-0.2771	0.3966	0.0435
0.45	54	0.5409	0.6721	0.0685
0.45	258	-0.7407	0.5778	0.0895
0.45	270	0.78	0.6431	0.0937
0.55	42	-0.2107	0.4956	0.0384
0.55	54	0.7545	0.6172	0.0909
0.55	234	-0.2602	0.5047	0.0422
0.55	246	-0.0077	0.405	0.03
0.55	258	0.5579	0.3779	0.0702
0.55	270	-0.0299	0.4579	0.0302
0.55	282	-1.3835	0.4553	0.1602
0.65	138	0.2807	0.585	0.0438
0.65	150	1.2476	0.5774	0.1451
0.65	162	0.3193	0.6485	0.0471
0.65	210	-0.5408	0.6237	0.0684
0.65	222	-0.2019	0.523	0.0378
0.65	234	0.3592	0.4348	0.0507
0.65	246	0.2366	0.3496	0.0403
0.65	258	0.4187	0.3177	0.0563
0.65	270	0.33	0.3726	0.0481
0.65	282	-0.5692	0.5758	0.0714
0.75	138	-0.0843	0.4882	0.0315
0.75	150	0.4784	0.4929	0.0621
0.75	162	0.5217	0.5009	0.0665
0.75	174	0.0818	0.5207	0.0314
0.75	186	-0.0011	0.5365	0.03
0.75	198	0.475	0.6651	0.0618
0.75	210	1.0699	0.6677	0.1254
0.75	222	0.0579	0.5112	0.0307
0.75	234	0.537	0.3857	0.0681
0.75	246	-0.4165	0.31	0.0561
0.75	258	0.1212	0.3242	0.033
0.75	270	-0.0153	0.3619	0.0301
0.75	282	1.3282	0.6031	0.1541
0.85	126	0.4602	0.7035	0.0603
0.85	138	-0.2423	0.5445	0.0407
0.85	150	0.6725	0.5058	0.0822
0.85	162	-0.1144	0.5258	0.0327
0.85	174	-0.1126	0.4782	0.0326
0.85	186	0.8099	0.7084	0.0969
0.85	210	0.5838	0.697	0.0729
0.85	222	0.3843	0.5996	0.053
0.85	234	0.2365	0.3902	0.0403
0.85	246	-0.2155	0.315	0.0387
0.85	258	-0.0937	0.2997	0.0318
0.85	270	0.7977	0.3911	0.0956
0.85	282	0.0689	0.587	0.031