CLAS Physics Database

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Measurement E151M479

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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 :	0.1205 GeV²
W :	1235 GeV
ε :	0.956
E_beam :	1.9889 GeV
ε_L:	0.6926

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	66	1.1027	0.5515	0.0738
0.45	66	0.1981	0.5817	0.0324
0.45	78	0.784	0.5108	0.0566
0.45	282	0.328	0.5013	0.0361
0.55	78	0.0005	0.468	0.03
0.55	270	0.4995	0.4247	0.0428
0.55	282	0.1343	0.4519	0.0311
0.65	258	-0.3679	0.5064	0.0375
0.65	270	-0.0158	0.3206	0.03
0.65	282	-0.4744	0.3711	0.0417
0.75	102	0.6422	0.5771	0.0494
0.75	258	0.624	0.4584	0.0485
0.75	270	-0.1912	0.3393	0.0322
0.75	282	-0.1824	0.3851	0.032
0.85	90	0.5469	0.4893	0.0449
0.85	102	0.0557	0.4433	0.0302
0.85	114	0.0438	0.3605	0.0301
0.85	126	0.5421	0.409	0.0447
0.85	138	-0.2771	0.4643	0.0345
0.85	258	0.439	0.443	0.0403
0.85	270	0.6811	0.4401	0.0513
0.95	90	-0.0037	0.4279	0.03
0.95	102	-0.3064	0.3446	0.0354
0.95	114	0.329	0.4091	0.0361
0.95	126	-0.1139	0.3382	0.0308
0.95	138	0.5282	0.4439	0.0441
0.95	150	-0.2831	0.3561	0.0346
0.95	162	0.1504	0.4243	0.0314
0.95	174	-0.1552	0.4392	0.0315
0.95	186	1.902	1.902	0.1201
0.95	246	0.5674	0.4849	0.0459