CLAS Physics Database

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Measurement E151M987

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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 :	0.5925 GeV²
W :	1325 GeV
ε :	0.9152
E_beam :	2.999 GeV
ε_L:	0.8865

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
0.55	78	-0.4277	0.6712	0.0433
0.55	282	0.4399	0.7311	0.044
0.65	90	-1.0055	0.5519	0.0794
0.65	282	0.2595	0.7217	0.0355
0.75	66	1.0357	0.7454	0.0814
0.75	78	0.4997	0.7503	0.0473
0.75	258	1.0851	0.6749	0.0848
0.75	282	-1.4945	0.3411	0.1133
0.75	294	0.6372	0.6451	0.0554
0.75	306	-0.6143	0.6035	0.054
0.85	66	-0.8568	0.5574	0.0694
0.85	78	0.0911	0.6527	0.0307
0.85	90	-0.3971	0.5417	0.0417
0.85	102	1.3557	0.7991	0.1035
0.85	114	0.6857	0.8841	0.0584
0.85	234	0.5375	0.736	0.0494
0.85	258	-0.3491	0.5855	0.0394
0.85	270	0.1112	0.607	0.0311
0.85	282	-1.5927	0.3743	0.1202
0.85	294	-1.1273	0.4756	0.0877
0.85	306	-1.0184	0.5254	0.0803
0.85	318	-0.4681	0.6106	0.0455
0.85	330	-0.4868	0.5788	0.0465
0.95	234	0.1352	0.711	0.0316
0.95	246	-0.0973	0.6179	0.0308
0.95	258	0.0018	0.6425	0.03
0.95	270	0.905	0.7429	0.0726