CLAS Physics Database

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Measurement E151M748

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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 :	1265 GeV
ε :	0.9385
E_beam :	2.2596 GeV
ε_L:	0.869

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	282	4.2216	1.6221	0.3908
0.65	282	0.3393	1.6616	0.0434
0.75	90	1.8363	2.0719	0.1721
0.75	102	-4.543	1.4414	0.4204
0.75	270	-0.9256	1.6526	0.0905
0.75	282	0.7765	1.5744	0.0777
0.75	294	2.4234	1.8342	0.2257
0.85	270	-0.9905	1.7535	0.0962
0.85	282	6.1534	6.1534	0.5687
0.85	294	-1.0624	1.4481	0.1025
0.95	78	-8.9784	5.0145	0.8292
0.95	102	7.0438	6.043	0.6508
0.25	66	0.2212	0.4642	0.0333
0.65	270	0.1423	0.4505	0.0314
0.65	282	-0.1855	0.4162	0.0324
0.75	78	0.0259	0.4627	0.03
0.75	90	-0.4789	0.4269	0.0434
0.75	270	-0.0771	0.4213	0.0304
0.75	282	0.4242	0.4458	0.0409
0.85	78	0.479	0.5252	0.0435
0.85	90	-0.165	0.4397	0.0319
0.85	102	0.3025	0.5241	0.036
0.85	114	-0.1754	0.5585	0.0321
0.85	246	-0.1022	0.4785	0.0307
0.85	258	0.0315	0.5284	0.0301
0.85	282	-0.1106	0.4475	0.0309
0.95	270	0.0567	0.8334	0.0302