CLAS Physics Database

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Measurement E151M2303

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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 :	0.496 GeV²
W :	1565 GeV
ε :	0.8672
E_beam :	2.999 GeV
ε_L:	0.3553

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
0.55	90	-1.6117	0.8773	0.1207
0.65	102	-0.693	0.8479	0.0585
0.65	114	-0.5048	0.993	0.0473
0.65	246	-0.4583	1.0293	0.0448
0.75	66	0.0214	0.8562	0.03
0.75	102	0.5376	0.91	0.0492
0.75	222	-0.0931	0.9284	0.0307
0.75	234	-1.2977	0.7686	0.0988
0.75	246	1.4909	0.8762	0.1122
0.85	54	-0.6833	0.9922	0.0579
0.85	210	0.1164	0.9402	0.0312
0.85	222	-1.0236	0.8462	0.0801
0.85	234	-0.6335	0.8309	0.0549
0.85	246	1.7586	0.719	0.131
0.85	258	0.767	0.7948	0.0632
0.85	270	0.0069	0.8701	0.03
0.85	282	-0.2871	0.8691	0.0365
0.85	294	-0.7428	0.8814	0.0617
0.95	222	0.32	0.879	0.0379
0.95	234	-0.1855	0.9022	0.0329
0.95	246	-1.9499	0.7227	0.1445
0.95	258	0.6511	0.8647	0.0559
0.95	270	0.4809	0.8934	0.046
0.95	282	-1.0459	0.6138	0.0816
0.95	294	0.8419	0.6119	0.068
0.95	306	-1.1287	0.7243	0.0872
0.95	318	0.2667	0.7767	0.0357