CLAS Physics Database

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Measurement E151M637

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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 :	0.0291 GeV²
W :	1565 GeV
ε :	0.8567
E_beam :	1.9889 GeV
ε_L:	0.0344

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	-0.2499	0.712	0.0337
0.35	270	-0.3737	0.6888	0.0377
0.35	282	0.4078	0.7262	0.039
0.45	78	1.1543	0.8018	0.0767
0.45	270	2.1483	0.7816	0.1348
0.55	90	1.0591	1.0238	0.0714
0.55	138	-0.5739	0.7968	0.0462
0.55	222	2.0081	0.7253	0.1264
0.55	270	1.2322	0.8151	0.0811
0.55	282	-0.2948	0.6506	0.035
0.65	126	-0.645	0.7161	0.0496
0.65	138	0.5433	0.6128	0.0448
0.65	198	0.3334	0.8194	0.0363
0.65	210	0.8188	0.6565	0.0584
0.65	222	-0.281	0.6491	0.0346
0.65	270	0.346	0.7879	0.0367
0.75	78	0.5202	0.7978	0.0437
0.75	126	-0.9107	0.7133	0.0633
0.75	138	0.4083	0.7659	0.039
0.75	210	0.1823	0.6343	0.032
0.75	222	0.6638	0.7614	0.0505
0.75	234	-0.6405	0.6112	0.0493
0.75	270	-0.0878	0.7647	0.0305
0.75	282	-0.844	0.5788	0.0597
0.85	114	-0.2975	0.694	0.0351
0.85	126	-1.2995	0.5656	0.085
0.85	210	0.3783	0.6415	0.0379
0.85	222	0.1076	0.7935	0.0307
0.85	234	0.651	0.6503	0.0499