CLAS Physics Database

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Measurement E151M24

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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 :	0.0143 GeV²
W :	1235 GeV
ε :	0.9145
E_beam :	1.0539 GeV
ε_L:	0.1064

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
0.25	42	0.1535	0.6121	0.0347
0.25	54	0.1966	0.6158	0.0374
0.35	42	-0.1995	0.4168	0.0376
0.35	54	-0.183	0.4779	0.0365
0.35	66	0.0256	0.6012	0.0301
0.45	42	0.3475	0.4895	0.0496
0.45	54	-0.0522	0.4066	0.0306
0.45	258	-0.3158	0.4486	0.0468
0.45	270	-0.1594	0.4161	0.0351
0.55	54	0.3498	0.5359	0.0498
0.55	246	-0.0173	0.3377	0.0301
0.55	258	-0.2083	0.3049	0.0382
0.55	270	0.2058	0.3103	0.0381
0.55	282	0.7069	0.44	0.0858
0.65	162	-0.8402	0.4292	0.1002
0.65	174	0.3462	0.5564	0.0495
0.65	186	0.3509	0.5502	0.0499
0.65	198	0.0538	0.5241	0.0306
0.65	210	-0.8515	0.4769	0.1014
0.65	222	-0.0893	0.4636	0.0317
0.65	234	0.3731	0.3967	0.052
0.65	246	-0.2307	0.2767	0.0399
0.65	258	-0.2478	0.2365	0.0412
0.65	270	-0.1073	0.2805	0.0324
0.65	282	0.8494	0.4191	0.1012
0.75	138	-0.1794	0.5439	0.0363
0.75	150	0.6382	0.5264	0.0786
0.75	162	-0.2107	0.4103	0.0384
0.75	174	-0.0657	0.3377	0.0309
0.75	186	1.0354	0.403	0.1216
0.75	198	-0.1771	0.4489	0.0361
0.75	210	-0.0983	0.4391	0.032
0.75	222	-0.209	0.4238	0.0383
0.75	234	0.0228	0.2994	0.0301
0.75	246	-0.3427	0.2687	0.0492
0.75	258	0.2529	0.2854	0.0416
0.75	270	-0.4914	0.2998	0.0635
0.85	150	-0.0118	0.4306	0.03
0.85	162	-0.3639	0.4584	0.0511
0.85	174	0.1004	0.3755	0.0321
0.85	186	0.3247	0.3676	0.0476
0.85	210	-0.8333	0.4047	0.0994
0.85	222	0.9055	0.502	0.1073
0.85	234	-0.0763	0.4467	0.0312
0.85	246	-0.0525	0.339	0.0306
0.85	258	0.4997	0.4792	0.0643