CLAS Physics Database

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Measurement E151M646

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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 :	0.1435 GeV²
W :	1565 GeV
ε :	0.8118
E_beam :	1.9889 GeV
ε_L:	0.1399

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
0.45	282	-0.1116	0.7683	0.0308
0.55	282	0.7114	0.8254	0.0529
0.65	114	-0.4496	0.7184	0.0407
0.65	126	-0.6705	0.7308	0.0508
0.65	234	0.1793	0.7127	0.0319
0.65	294	-0.3044	0.5585	0.0353
0.75	114	-1.188	0.5817	0.0786
0.75	126	-0.204	0.7919	0.0325
0.75	138	-0.4341	0.7023	0.0401
0.75	198	0.0661	0.8266	0.0303
0.75	210	-0.4763	0.6383	0.0418
0.75	222	-0.1696	0.6201	0.0317
0.75	234	-0.4641	0.6415	0.0413
0.75	246	0.1197	0.7579	0.0309
0.75	294	0.1819	0.7422	0.032
0.85	90	0.2878	0.7134	0.0348
0.85	126	0.7529	0.8505	0.055
0.85	210	-1.3911	0.5911	0.0902
0.85	222	0.138	0.6203	0.0312
0.85	246	0.9545	0.5763	0.0656
0.85	258	0.0454	0.7586	0.0301
0.95	90	-0.0067	0.7011	0.03
0.95	102	-0.2081	0.7188	0.0326
0.95	222	-0.421	0.6443	0.0395
0.95	234	0.7314	0.7154	0.0539
0.95	246	0.8267	0.7765	0.0588
0.95	258	-0.3494	0.652	0.0368