CLAS Physics Database

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Measurement E151M858

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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 :	0.0415 GeV²
W :	1535 GeV
ε :	0.9039
E_beam :	2.2596 GeV
ε_L:	0.0574

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
0.35	78	-0.7095	0.4487	0.0803
0.55	78	-1.2457	0.7497	0.1188
0.55	114	-1.6406	0.7618	0.1544
0.55	126	-0.42	0.8695	0.049
0.55	282	-0.1213	0.7392	0.032
0.65	126	1.2521	1.0664	0.1194
0.65	138	0.1193	0.8794	0.032
0.65	222	-0.5203	0.7687	0.0566
0.75	114	0.3765	1.12	0.0459
0.75	138	-1.7253	0.8314	0.162
0.75	210	-0.5623	0.937	0.0599
0.75	234	-0.1767	0.9238	0.0341
0.75	282	0.1747	0.8103	0.0341
0.85	102	2.1208	1.2319	0.198
0.85	114	-0.3027	1.0684	0.041
0.85	222	0.9418	1.0041	0.092
0.85	234	0.5656	0.8937	0.0602
0.45	66	-0.2353	0.6561	0.0337
0.45	270	0.8752	0.7481	0.0648
0.45	282	0.515	0.726	0.0452
0.55	114	-1.2836	0.5282	0.0894
0.55	138	-1.9664	0.5324	0.1325
0.55	282	2.2244	0.5454	0.149
0.65	126	0.9144	0.8009	0.0671
0.65	150	-0.7177	0.6971	0.0558
0.65	210	0.8003	0.8316	0.0605
0.65	222	0.5458	0.8501	0.0467
0.65	270	0.0647	0.7337	0.0303
0.75	126	-1.3032	0.6785	0.0906
0.75	138	-0.9417	0.6531	0.0687
0.75	210	1.7405	0.9218	0.1181
0.75	222	1.0593	0.8261	0.0757
0.75	234	0.429	0.7843	0.0411
0.75	282	0.8894	0.7732	0.0656
0.85	102	-0.3354	0.7901	0.0372
0.85	114	-0.0064	0.6969	0.03
0.85	210	0.2332	0.8491	0.0337
0.85	222	0.7403	0.8269	0.0571
0.85	234	1.7381	0.9485	0.1179