CLAS Physics Database

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Measurement E151M149

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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 :	0.0121 GeV²
W :	1415 GeV
ε :	0.7141
E_beam :	1.0539 GeV
ε_L:	0.0236

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	-0.4735	0.8241	0.0617
0.35	30	3.0204	3.0204	0.3449
0.35	42	-0.478	0.5876	0.0621
0.35	54	0.558	0.6442	0.0702
0.45	30	1.1374	0.8732	0.1328
0.45	42	-0.0802	0.5335	0.0314
0.45	54	-0.0788	0.542	0.0313
0.45	66	0.5861	0.8055	0.0731
0.45	222	-0.3521	0.7165	0.0501
0.45	234	0.6986	0.6661	0.085
0.45	246	1.2254	0.8123	0.1426
0.55	18	0.5314	0.8101	0.0675
0.55	30	1.0382	0.7353	0.1219
0.55	42	0.2253	0.4786	0.0395
0.55	54	-0.6883	0.5055	0.0839
0.55	66	-0.0821	0.842	0.0314
0.55	138	-1.1077	0.7099	0.1295
0.55	150	-1.3064	0.6373	0.1516
0.55	162	-0.7979	0.6667	0.0956
0.55	210	0.8829	0.889	0.1048
0.55	222	-0.5251	0.5526	0.0669
0.55	234	0.619	0.7003	0.0766
0.55	246	1.2554	0.6204	0.1459
0.55	258	0.9729	0.7306	0.1147
0.65	30	-0.647	0.7912	0.0795
0.65	42	3.1686	3.1686	0.3617
0.65	54	-0.994	0.6803	0.117
0.65	138	0.5266	0.9125	0.067
0.65	150	0.0043	0.6636	0.03
0.65	162	-1.0923	0.5863	0.1278
0.65	210	0.9628	0.7515	0.1136
0.65	222	0.0886	0.5165	0.0316
0.65	234	-0.0888	0.4961	0.0317
0.65	246	-1.1628	0.4049	0.1356
0.65	258	0.4777	0.7738	0.0621
0.75	42	-0.0787	0.849	0.0313
0.75	138	-0.3856	0.7054	0.0531
0.75	150	-0.8651	0.7347	0.1029
0.75	162	0.4047	0.8741	0.055
0.75	174	0.5666	0.8555	0.0711
0.75	210	0.2833	0.7126	0.044
0.75	222	-0.1072	0.537	0.0324
0.75	234	0.6233	0.5482	0.077
0.75	246	-0.0149	0.4738	0.03
0.75	258	1.722	0.6811	0.1982
0.85	150	-0.76	0.7125	0.0915
0.85	210	-0.0986	0.7229	0.032
0.85	222	0.7748	0.5784	0.0931
0.85	234	0.2574	0.4769	0.0419
0.85	246	0.306	0.4342	0.046
0.85	258	-0.4601	0.587	0.0603