CLAS Physics Database

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Measurement E151M92

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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 :	0.0291 GeV²
W :	1325 GeV
ε :	0.82
E_beam :	1.0539 GeV
ε_L:	0.1029

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
0.15	42	0.545	0.7961	0.0689
0.25	30	-0.6582	0.692	0.0807
0.25	42	-0.4912	0.6355	0.0634
0.25	54	1.2639	0.7593	0.1469
0.35	30	-0.6806	0.6598	0.083
0.35	42	1.4777	0.6359	0.1708
0.35	54	-1.0614	0.6417	0.1244
0.45	30	0.165	0.5141	0.0354
0.45	42	1.8528	0.5936	0.2129
0.45	54	-0.1179	0.6355	0.0329
0.55	42	0.3305	0.6823	0.0481
0.55	54	0.7684	0.7838	0.0924
0.55	234	-0.552	0.4456	0.0696
0.55	246	-0.5137	0.4254	0.0657
0.55	258	0.5096	0.4376	0.0653
0.55	270	-0.3611	0.5464	0.0509
0.65	138	-0.3029	0.6806	0.0457
0.65	150	0.1503	0.6579	0.0345
0.65	162	0.1399	0.7163	0.034
0.65	174	-0.2904	0.7757	0.0446
0.65	186	-0.1411	0.7908	0.034
0.65	210	0.127	0.7335	0.0333
0.65	222	0.2794	0.5342	0.0437
0.65	234	0.3969	0.4276	0.0542
0.65	246	-0.4267	0.4125	0.0571
0.65	258	-0.0269	0.3736	0.0302
0.65	270	0.8147	0.5156	0.0974
0.75	138	0.7439	0.7005	0.0898
0.75	150	0.0544	0.5517	0.0306
0.75	162	-0.5234	0.5259	0.0667
0.75	174	-0.4225	0.5321	0.0567
0.75	186	-0.3914	0.6292	0.0537
0.75	222	1.7388	0.5667	0.2001
0.75	234	-0.2578	0.4074	0.042
0.75	246	0.2478	0.4277	0.0412
0.75	258	0.0822	0.392	0.0314
0.75	270	0.1649	0.4267	0.0354
0.75	282	-0.1446	0.6841	0.0342
0.85	138	-0.8868	0.5843	0.1053
0.85	150	-0.4991	0.556	0.0642
0.85	162	-0.6613	0.569	0.081
0.85	174	0.0942	0.7022	0.0319
0.85	222	-0.9339	0.5528	0.1104
0.85	234	-0.3308	0.4352	0.0481
0.85	246	0.546	0.3618	0.069
0.85	258	0.4539	0.4478	0.0597
0.85	270	-0.0724	0.3797	0.0311
0.85	282	1.0912	0.6902	0.1277
0.95	138	-0.28	0.5088	0.0438
0.95	246	0.1579	0.4678	0.035
0.95	258	-0.0126	0.579	0.03