CLAS Physics Database

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Measurement E151M1130

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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 :	0.4155 GeV²
W :	1685 GeV
ε :	0.8348
E_beam :	2.999 GeV
ε_L:	0.2167

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	102	0.0772	0.7086	0.0305
0.55	306	0.4658	0.7804	0.0454
0.65	102	-0.8767	0.6462	0.0708
0.65	114	-1.156	0.587	0.0897
0.65	222	0.2913	0.786	0.0368
0.75	78	-0.7831	0.6386	0.0646
0.75	222	1.421	0.897	0.1081
0.75	234	1.9165	0.8857	0.1433
0.85	66	0.4638	0.6293	0.0453
0.85	78	-0.4888	0.601	0.0467
0.85	90	-0.0493	0.767	0.0302
0.85	198	0.6634	0.8267	0.057
0.85	210	1.765	0.8225	0.1324
0.85	222	0.0884	0.6456	0.0307
0.85	234	0.2366	0.6677	0.0346
0.85	246	0.2491	0.5496	0.0351
0.85	258	-0.1155	0.5707	0.0312
0.85	270	0.2024	0.6607	0.0334
0.95	198	0.1918	0.6481	0.0331
0.95	210	-0.4026	0.6016	0.042
0.95	222	0.1933	0.6075	0.0332
0.95	234	0.2667	0.5676	0.0358
0.95	246	0.4938	0.6459	0.0469
0.95	258	-0.245	0.5173	0.0349
0.95	270	-0.2	0.547	0.0334
0.95	282	0.158	0.5253	0.0321
0.95	294	0.4928	0.7012	0.0469