CLAS Physics Database

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Measurement E151M33

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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 :	0.0707 GeV²
W :	1235 GeV
ε :	0.8648
E_beam :	1.0539 GeV
ε_L:	0.4208

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_UL,
Plot measurement data

Parameter (X axis): φ(π⁺), degrees

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Measured data:

cos(θ_π⁺)	φ(π⁺), degrees	A_UL	Data errors	Systematic errors
0.05	42	-0.0453	0.5898	0.0304
0.15	42	0.7919	0.5444	0.095
0.15	54	0.8466	0.5887	0.1009
0.25	42	0.7141	0.5558	0.0866
0.25	54	-0.1091	0.6191	0.0325
0.35	282	-0.2797	0.4643	0.0437
0.45	270	0.3292	0.4423	0.048
0.45	282	0.118	0.4086	0.0329
0.45	294	-0.0168	0.4914	0.0301
0.55	258	0.1982	0.4201	0.0375
0.55	270	0.0386	0.3234	0.0303
0.55	282	0.0118	0.3043	0.03
0.55	294	-0.33	0.3717	0.0481
0.65	246	0.1185	0.5029	0.0329
0.65	258	0.1991	0.3654	0.0376
0.65	270	0.3469	0.2935	0.0496
0.65	282	-0.1569	0.287	0.0349
0.65	294	0.0157	0.4404	0.0301
0.75	138	0.9754	0.5702	0.115
0.75	234	-0.9713	0.3739	0.1145
0.75	246	0.116	0.4475	0.0328
0.75	258	0.2937	0.3142	0.0449
0.75	270	-0.0335	0.2869	0.0302
0.75	282	0.2123	0.3434	0.0385
0.75	294	-0.3884	0.4047	0.0534
0.85	114	0.6923	0.5651	0.0843
0.85	126	0.2794	0.4528	0.0437
0.85	138	-0.5252	0.3441	0.0669
0.85	150	-0.1812	0.343	0.0364
0.85	162	0.0133	0.3166	0.03
0.85	174	-0.1249	0.3519	0.0332
0.85	186	-0.1174	0.3323	0.0328
0.85	198	0.2272	0.4131	0.0396
0.85	210	-1.0011	0.2882	0.1178
0.85	222	-0.3461	0.4779	0.0495
0.85	246	0.0075	0.4444	0.03
0.85	258	-0.16	0.3686	0.0351
0.85	270	0.2474	0.3302	0.0411
0.85	282	-0.2937	0.3571	0.0449
0.95	126	0.0019	0.3869	0.03
0.95	138	0.1194	0.3508	0.0329
0.95	150	-0.4943	0.2564	0.0637
0.95	162	-0.0828	0.3105	0.0314
0.95	174	0.1614	0.3297	0.0352
0.95	186	-0.2687	0.2973	0.0428
0.95	198	0.5369	0.3798	0.0681
0.95	210	0.6932	0.3727	0.0844