CLAS Physics Database

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Measurement E151M201

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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 :	0.0245 GeV²
W :	1205 GeV
ε :	0.9559
E_beam :	1.3383 GeV
ε_L:	0.2317

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
0.55	258	-0.6354	0.2846	0.0501
0.55	270	-0.2744	0.2817	0.0373
0.55	282	0.8122	0.3011	0.0692
0.65	246	-0.2736	0.3082	0.0362
0.65	258	0.2	0.2822	0.0351
0.65	270	-0.2052	0.2532	0.0363
0.75	150	0.2597	0.7096	0.0338
0.75	174	0.041	0.6978	0.0301
0.75	186	0.0597	0.6895	0.0302
0.75	234	0.5177	0.7723	0.0433
0.75	246	-0.8363	0.2967	0.0586
0.75	258	0.0129	0.4903	0.03
0.75	270	-0.3974	0.4196	0.0384
0.85	138	-0.2417	0.5972	0.0333
0.85	150	-0.6362	0.3763	0.0487
0.85	162	-0.1154	0.5866	0.0308
0.85	174	1.6225	1.6225	0.1022
0.85	186	-0.2476	0.5633	0.0335
0.85	198	0.1685	0.5772	0.0317
0.85	222	0.6176	0.7482	0.0478
0.65	282	1.0513	0.4091	0.0717
0.75	246	-0.3855	0.3858	0.0383
0.75	258	-0.229	0.3481	0.0332
0.75	270	-0.4597	0.3456	0.0414
0.85	150	0.6043	0.417	0.048
0.85	162	0.1812	0.3937	0.032
0.85	174	-0.5284	0.3501	0.0444
0.85	186	-0.4071	0.3072	0.0392
0.85	198	-0.1025	0.3749	0.0307