CLAS Physics Database

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Measurement E151M1881

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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_LL,

Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁺n, polarization: none

Q² :	0.0844 GeV²
W :	1595 GeV
ε :	0.8139
E_beam :	1.9889 GeV
ε_L:	0.0792

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_LL,
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_LL	Stat. error	Syst. error
0.45	78	0.6001	0.9446	0.0471
0.45	282	0.7608	0.909	0.055
0.55	222	0.8554	0.8925	0.0599
0.55	270	0.7052	0.8073	0.0522
0.55	282	-0.1363	0.9335	0.0311
0.65	126	1.1609	0.8687	0.0765
0.65	150	1.0123	0.8747	0.0683
0.65	198	0.055	1.0071	0.0302
0.65	210	0.7609	0.9671	0.055
0.65	222	-0.7104	0.7255	0.0525
0.65	294	0.5606	0.7555	0.0453
0.75	126	-0.511	0.8484	0.0431
0.75	138	0.2778	0.8917	0.0344
0.75	210	1.2553	0.8756	0.0818
0.75	222	1.156	0.9119	0.0762
0.75	234	-1.1135	0.6409	0.0738
0.75	246	0.5195	0.9325	0.0435
0.75	270	0.5278	0.8609	0.0439
0.75	282	-0.885	0.6856	0.0614
0.75	294	0.1947	0.7126	0.0322
0.85	102	-0.6755	0.8443	0.0507
0.85	114	-1.46	0.8724	0.0934
0.85	210	-0.9162	0.8975	0.0631
0.85	222	0.6888	0.6348	0.0514
0.85	234	-2.6162	2.6162	0.1613
0.85	246	0.5328	0.7983	0.0441
0.95	234	0.3573	0.8743	0.037