CLAS Physics Database

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Measurement E151M45

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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 :	1265 GeV
ε :	0.8925
E_beam :	1.0539 GeV
ε_L:	0.0837

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	-0.21	0.6011	0.0384
0.25	54	1.2146	0.7003	0.1414
0.35	42	1.4233	0.5364	0.1647
0.35	54	-0.139	0.4931	0.0339
0.35	66	0.3786	0.6905	0.0525
0.45	30	0.9507	0.5799	0.1122
0.45	42	0.6588	0.4651	0.0807
0.45	54	0.4549	0.5221	0.0598
0.45	258	-0.852	0.4928	0.1015
0.45	270	0.0507	0.5103	0.0305
0.55	30	0.8708	0.6692	0.1035
0.55	42	-0.2753	0.4395	0.0434
0.55	54	0.5254	0.5713	0.0669
0.55	234	0.4173	0.4799	0.0562
0.55	246	0.3246	0.3965	0.0476
0.55	258	-0.0326	0.325	0.0302
0.55	270	-0.1714	0.361	0.0358
0.55	282	-0.1518	0.5217	0.0346
0.65	138	1.0661	0.6621	0.1249
0.65	150	0.5366	0.6218	0.068
0.65	162	0.6703	0.5288	0.082
0.65	174	0.1557	0.4735	0.0348
0.65	186	-0.1683	0.5538	0.0356
0.65	198	-0.2459	0.5947	0.041
0.65	222	1.131	0.5808	0.1321
0.65	234	0.0474	0.3516	0.0305
0.65	246	-0.1858	0.2752	0.0367
0.65	258	-0.0985	0.2528	0.032
0.65	270	-0.8194	0.2873	0.0979
0.65	282	1.0076	0.5376	0.1185
0.75	138	0.0999	0.4803	0.0321
0.75	150	0.8911	0.4681	0.1057
0.75	162	-0.1627	0.4081	0.0353
0.75	174	0.2991	0.4179	0.0454
0.75	186	-0.4318	0.4803	0.0576
0.75	198	0.2302	0.5159	0.0398
0.75	210	-0.4084	0.4435	0.0553
0.75	222	-0.1668	0.4234	0.0355
0.75	234	0.7099	0.356	0.0862
0.75	246	0.0244	0.271	0.0301
0.75	258	-0.1599	0.2442	0.0351
0.75	270	-0.007	0.3349	0.03
0.75	282	1.2095	0.5318	0.1408
0.85	138	0.19	0.6115	0.037
0.85	150	-0.1578	0.5505	0.035
0.85	162	0.3871	0.5334	0.0533
0.85	174	-0.0063	0.484	0.03
0.85	186	0.9464	0.5515	0.1118
0.85	198	0.5397	0.6014	0.0683
0.85	222	0.5756	0.4542	0.072
0.85	234	0.1306	0.3522	0.0335
0.85	246	0.2218	0.288	0.0392
0.85	258	-0.1561	0.361	0.0349
0.85	270	-0.697	0.3779	0.0848