CLAS Physics Database

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Measurement E151M234

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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 :	0.0143 GeV²
W :	1265 GeV
ε :	0.9379
E_beam :	1.3383 GeV
ε_L:	0.0879

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	Data errors	Systematic errors
0.65	234	0.1165	0.6468	0.0308
0.65	246	0.1095	0.5251	0.0307
0.65	258	0.0185	0.5627	0.03
0.65	270	-1.0454	0.3619	0.0697
0.75	162	0.88	0.9203	0.0609
0.75	234	-0.4166	0.6034	0.0391
0.75	246	-0.1201	0.5077	0.0309
0.75	258	0.0141	0.5149	0.03
0.75	270	0.5597	0.7002	0.0451
0.85	162	0.5207	0.937	0.0434
0.85	234	-0.8482	0.4189	0.0592
0.85	246	-0.3901	0.5202	0.0381
0.85	258	-0.1379	0.6058	0.0311
0.55	246	-0.0476	0.5196	0.0301
0.55	258	-0.1435	0.5174	0.0313
0.65	234	-0.2072	0.4998	0.0326
0.65	246	-0.1126	0.3763	0.0308
0.65	258	-0.3698	0.3492	0.0377
0.65	270	0.0811	0.4339	0.0304
0.75	150	-0.5809	0.4737	0.0468
0.75	234	0.5807	0.503	0.0468
0.75	246	0.0178	0.3906	0.03
0.75	258	0.3907	0.4118	0.0385
0.75	270	-0.5037	0.3716	0.0433
0.85	234	0.4978	0.4846	0.043
0.85	246	-0.0661	0.4469	0.0303
0.85	258	0.007	0.3994	0.03