CLAS Physics Database

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Measurement E151M302

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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 :	0.101 GeV²
W :	1355 GeV
ε :	0.8289
E_beam :	1.3383 GeV
ε_L:	0.264

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	246	0.3759	0.6321	0.038
0.55	258	0.1331	0.9074	0.0311
0.55	270	-0.4431	0.343	0.0777
0.65	114	0.2291	0.6179	0.0332
0.65	126	-0.5453	0.4811	0.0612
0.65	138	0.018	0.6683	0.03
0.65	234	0.8278	0.524	0.0592
0.65	246	-0.1509	0.3869	0.0378
0.65	258	-0.6061	0.3438	0.0518
0.65	270	0.2324	0.4267	0.0359
0.75	114	0.2107	0.4987	0.0439
0.75	126	0.2313	0.4117	0.0418
0.75	138	0.5734	0.4361	0.051
0.75	150	-0.4719	0.4034	0.0533
0.75	222	-0.0686	0.7865	0.0303
0.75	234	-0.278	0.3784	0.0347
0.75	246	-0.0291	0.3931	0.0441
0.75	258	-0.4078	0.3183	0.0457
0.75	270	-0.4732	0.3221	0.0469
0.75	282	-0.3844	0.4105	0.0385
0.85	102	0.1648	0.5555	0.0379
0.85	114	-0.2847	0.3196	0.0393
0.85	126	0.0685	0.4076	0.0342
0.85	138	-0.6414	0.3577	0.0635
0.85	150	-0.3322	0.4368	0.0422
0.85	162	0.3986	0.5089	0.0395
0.85	234	-0.3398	0.3806	0.0369
0.85	246	0.0863	0.348	0.0307
0.85	258	-0.3603	0.3118	0.0373
0.85	270	0.1193	0.3241	0.0309
0.85	282	0.412	0.3194	0.0409
0.85	294	0.3255	0.5016	0.037
0.95	78	0.0527	0.4086	0.0342
0.95	90	-0.2042	0.3297	0.036
0.95	102	0.3968	0.4762	0.0388
0.95	138	0.2255	0.4726	0.0339
0.95	150	0.2547	0.5786	0.0339
0.95	234	-0.6294	0.5313	0.0483
0.95	246	0.2085	0.4043	0.0326
0.95	258	0.2293	0.324	0.0386
0.95	270	-0.1449	0.3978	0.0313
0.95	282	-0.1821	0.3132	0.032