CLAS Physics Database

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Measurement E151M386

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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 :	0.0121 GeV²
W :	1505 GeV
ε :	0.7368
E_beam :	1.3383 GeV
ε_L:	0.016

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
0.55	30	3.3122	3.3122	0.2017
0.55	42	1.2571	0.3779	0.104
0.55	138	-1.1353	0.5638	0.0747
0.55	150	-0.6751	0.5803	0.0515
0.55	210	-0.4018	0.735	0.0385
0.55	222	1.7484	1.1161	0.1095
0.55	234	-0.1992	0.3894	0.0454
0.65	126	-0.5082	0.6064	0.0435
0.65	138	0.2213	0.9509	0.0328
0.65	210	0.1257	0.4658	0.0314
0.65	222	1.0888	0.4758	0.0752
0.75	210	-0.8681	0.4924	0.0603
0.75	222	0.4942	0.8428	0.0423
0.75	234	2.0572	2.0572	0.1275
0.85	222	0.4246	0.832	0.0394
0.85	234	-0.0103	0.7052	0.03
0.65	234	0.7506	0.5434	0.0553
0.75	210	0.1374	0.5926	0.0312
0.75	222	0.7109	0.5288	0.0533
0.75	234	-0.6607	0.5126	0.0507
0.85	126	-1.271	0.4987	0.0842
0.85	222	0.6464	0.5606	0.05
0.85	234	0.1059	0.4975	0.0307