CLAS Physics Database

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Measurement E151M1128

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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 :	0.2915 GeV²
W :	1685 GeV
ε :	0.8603
E_beam :	2.999 GeV
ε_L:	0.1744

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	270	3.8518	3.8518	0.2831
0.45	282	-0.2615	0.6605	0.0356
0.55	102	0.5538	0.7364	0.0504
0.55	114	-0.5033	0.6797	0.0475
0.55	210	0.3693	0.8559	0.0404
0.55	294	0.5764	0.789	0.0517
0.65	90	-0.5316	0.6297	0.0491
0.65	102	-0.2965	0.5846	0.037
0.65	114	-1.1853	0.5095	0.0917
0.65	198	1.513	0.9148	0.1146
0.65	210	2.5973	2.5973	0.1922
0.65	222	1.4327	0.8051	0.1089
0.65	234	-0.3554	0.6541	0.0397
0.65	294	0.2545	0.6137	0.0353
0.65	306	-1.0271	0.5157	0.0808
0.75	78	-0.5678	0.562	0.0512
0.75	102	-0.89	0.6295	0.0716
0.75	114	-0.8102	0.5144	0.0664
0.75	126	-0.0345	0.8085	0.0301
0.75	186	0.084	0.7194	0.0306
0.75	198	-0.853	0.5707	0.0692
0.75	210	1.3191	0.7563	0.101
0.75	222	0.4948	0.7118	0.047
0.75	234	0.9265	0.6489	0.0741
0.75	246	0.0586	0.7077	0.0303
0.75	294	0.176	0.7294	0.0326
0.85	66	-0.5606	0.4881	0.0508
0.85	78	-0.2761	0.488	0.0362
0.85	90	-0.0569	0.5649	0.0303
0.85	186	-0.6337	0.6338	0.0552
0.85	198	0.5565	0.6517	0.0505
0.85	210	0.3055	0.5968	0.0374
0.85	222	0.7535	0.4653	0.0627
0.85	234	0.6403	0.506	0.0556
0.85	246	-0.2875	0.4287	0.0366
0.85	258	0.3261	0.6552	0.0383
0.85	270	2.5024	2.5024	0.1853
0.95	90	0.1689	0.7264	0.0324
0.95	174	-0.5463	0.5699	0.0499
0.95	198	-0.4935	0.5611	0.0469
0.95	210	0.6309	0.5952	0.055
0.95	222	0.2822	0.55	0.0364
0.95	234	-0.1432	0.4899	0.0318
0.95	246	0.4502	0.5108	0.0445
0.95	258	0.0804	0.4969	0.0306
0.95	270	0.3534	0.4734	0.0396
0.95	282	0.2444	0.5531	0.0349
0.95	294	-0.0153	0.6476	0.03