CLAS Physics Database

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Measurement E151M669

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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 :	1625 GeV
ε :	0.8139
E_beam :	1.9889 GeV
ε_L:	0.0261

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	0.6224	0.8082	0.0485
0.45	78	-0.271	0.7485	0.0343
0.45	90	2.9673	2.9673	0.184
0.45	138	-0.6282	0.7229	0.0487
0.45	270	1.0059	0.7669	0.0684
0.45	282	0.6466	0.8145	0.0496
0.55	78	0.0885	0.7121	0.0305
0.55	198	1.9873	0.9016	0.1252
0.55	210	-0.8554	0.5688	0.0603
0.55	270	0.1289	0.5919	0.031
0.55	282	-0.4877	0.6742	0.0423
0.65	126	0.1228	0.6894	0.0309
0.65	138	-0.7638	0.581	0.0555
0.65	150	-1.025	0.6923	0.0695
0.65	210	1.193	0.8397	0.0789
0.65	222	-0.5979	0.6252	0.0473
0.65	282	-0.0732	0.6954	0.0303
0.75	66	0.3182	0.7542	0.0358
0.75	78	0.6543	0.7826	0.05
0.75	210	0.7046	0.6521	0.0525
0.75	222	0.7236	0.6432	0.0535
0.75	270	-0.5428	0.5243	0.0447
0.75	282	-0.3812	0.5712	0.038
0.75	294	1.2115	0.7895	0.0799
0.85	114	0.3712	0.6983	0.0376
0.85	126	-0.0519	0.5416	0.0302
0.85	138	-1.1515	0.5581	0.0765
0.85	198	2.2808	0.6878	0.1427
0.85	210	-0.0942	0.6266	0.0305
0.85	222	-0.3128	0.5911	0.0356