CLAS Physics Database

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Measurement E151M942

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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 :	0.2445 GeV²
W :	1205 GeV
ε :	0.9724
E_beam :	2.999 GeV
ε_L:	1.257

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	0.1811	0.6115	0.0328
0.45	294	-0.0261	0.5852	0.0301
0.55	282	0.2555	0.6057	0.0353
0.55	294	0.2542	0.6046	0.0353
0.65	270	0.5585	0.6006	0.0507
0.65	282	0.6517	0.629	0.0563
0.65	294	0.127	0.4741	0.0314
0.75	66	-0.2032	0.6211	0.0335
0.75	78	0.2408	0.5655	0.0348
0.75	90	-0.8501	0.428	0.069
0.75	270	-0.2357	0.5031	0.0346
0.75	282	0.5326	0.5322	0.0491
0.75	294	0.1832	0.5376	0.0329
0.85	54	-0.833	0.4788	0.0679
0.85	66	-0.607	0.43	0.0536
0.85	78	0.6256	0.518	0.0547
0.85	90	-0.6358	0.3901	0.0553
0.85	102	-0.3119	0.4545	0.0377
0.85	258	-0.2022	0.5924	0.0334
0.85	270	1.4879	0.6712	0.1128
0.85	282	0.1378	0.5446	0.0316
0.85	294	-0.0732	0.5619	0.0305
0.95	30	0.8707	0.6534	0.0704
0.95	54	-0.9521	0.4056	0.0758
0.95	66	0.6913	0.583	0.0588
0.95	78	0.2281	0.525	0.0343
0.95	90	-0.2954	0.4966	0.037
0.95	102	0.5918	0.6143	0.0526
0.95	114	-0.6549	0.4675	0.0565