CLAS Physics Database

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Measurement E151M140

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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 :	0.0844 GeV²
W :	1385 GeV
ε :	0.6751
E_beam :	1.0539 GeV
ε_L:	0.1594

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	1.5122	0.7714	0.1746
0.55	234	-0.6353	0.7614	0.0783
0.55	246	-0.1717	0.7724	0.0358
0.55	258	0.2035	0.6619	0.0379
0.65	150	0.9243	0.9018	0.1094
0.65	234	0.6001	0.724	0.0746
0.65	246	-0.7171	0.5813	0.0869
0.65	258	0.3404	0.65	0.049
0.65	270	-0.8529	0.6399	0.1016
0.75	138	1.6256	0.9117	0.1874
0.75	150	0.4423	0.8078	0.0586
0.75	162	-1.2986	0.7065	0.1508
0.75	174	0.4777	0.8132	0.0621
0.75	234	-0.5779	0.6737	0.0723
0.75	246	0.2518	0.6167	0.0415
0.75	258	1.0633	0.6194	0.1246
0.75	270	-1.0814	0.5208	0.1266
0.85	126	-0.2641	0.8438	0.0425
0.85	138	-1.4446	0.6864	0.1671
0.85	150	-0.5291	0.7886	0.0673
0.85	162	0.4263	0.8828	0.057
0.85	174	0.543	0.7551	0.0687
0.85	234	0.3667	0.6938	0.0514
0.85	246	-0.5788	0.4973	0.0724
0.85	258	0.0075	0.5792	0.03
0.85	270	0.4764	0.4833	0.0619
0.85	282	0.9975	0.6152	0.1174
0.95	258	0.1043	0.5494	0.0323
0.95	270	2.2155	2.2155	0.2538