CLAS Physics Database

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Measurement E151M43

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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 :	0.0101 GeV²
W :	1265 GeV
ε :	0.8964
E_beam :	1.0539 GeV
ε_L:	0.0598

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
0.35	54	-0.1859	0.6547	0.0367
0.45	54	-1.0877	0.5112	0.1273
0.55	42	-1.1366	0.4715	0.1327
0.55	54	-0.1852	0.6435	0.0367
0.55	234	-0.0717	0.4339	0.0311
0.55	246	-0.1805	0.3959	0.0364
0.55	258	0.2261	0.4257	0.0395
0.55	270	-0.0251	0.4387	0.0301
0.65	150	-0.5399	0.5521	0.0684
0.65	162	-0.1599	0.6024	0.0351
0.65	174	0.0869	0.6183	0.0316
0.65	186	0.6856	0.6353	0.0836
0.65	222	-0.4961	0.474	0.0639
0.65	234	0.3286	0.469	0.0479
0.65	246	-0.2099	0.3322	0.0383
0.65	258	-0.3019	0.3316	0.0456
0.65	270	-0.2431	0.4748	0.0408
0.75	150	0.5265	0.5551	0.067
0.75	162	0.9355	0.5577	0.1106
0.75	186	-0.5431	0.5573	0.0687
0.75	222	0.9316	0.5681	0.1102
0.75	234	0.8025	0.404	0.0961
0.75	246	0.3562	0.3528	0.0504
0.75	258	0.1389	0.3593	0.0339
0.75	270	-0.0132	0.4283	0.03
0.85	222	0.7974	0.636	0.0956
0.85	234	-0.3078	0.4547	0.0461
0.85	246	1.0451	0.4601	0.1226
0.85	258	0.1198	0.4705	0.033