CLAS Physics Database

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Measurement E151M115

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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 :	0.0415 GeV²
W :	1355 GeV
ε :	0.7694
E_beam :	1.0539 GeV
ε_L:	0.1132

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
0.25	42	-1.5823	0.5767	0.1825
0.25	54	-0.4721	0.7055	0.0615
0.35	30	0.6778	0.7759	0.0827
0.35	42	1.359	0.7531	0.1575
0.35	54	-0.1123	0.8793	0.0326
0.45	30	0.502	0.8365	0.0645
0.45	42	0.4254	0.5997	0.0569
0.45	54	-0.4689	0.7936	0.0612
0.45	258	0.0061	0.7839	0.03
0.55	42	-0.1577	0.77	0.035
0.55	54	0.8424	0.9352	0.1004
0.55	234	-0.253	0.6602	0.0416
0.55	246	-0.2675	0.5425	0.0427
0.55	258	-0.1701	0.5523	0.0357
0.55	270	-0.1012	0.7308	0.0321
0.65	138	-0.4438	0.7327	0.0587
0.65	150	-0.7911	0.5492	0.0949
0.65	162	-1.1509	0.6753	0.1343
0.65	174	-0.486	0.7594	0.0629
0.65	186	-0.6973	0.7311	0.0848
0.65	210	0.7233	0.8419	0.0876
0.65	222	0.4335	0.6807	0.0577
0.65	234	-0.4549	0.4148	0.0598
0.65	246	-0.6313	0.4372	0.0778
0.65	258	0.2391	0.4753	0.0405
0.65	270	-0.8728	0.4779	0.1037
0.75	126	0.4654	0.8651	0.0609
0.75	138	-0.8692	0.6832	0.1033
0.75	150	0.1642	0.7302	0.0353
0.75	162	0.7682	0.7451	0.0924
0.75	174	0.206	0.7181	0.0381
0.75	186	0.0755	0.6823	0.0312
0.75	210	-0.1113	0.775	0.0326
0.75	222	-0.1891	0.5707	0.0369
0.75	234	0.6018	0.5698	0.0748
0.75	246	0.1334	0.4554	0.0336
0.75	258	0.1792	0.4611	0.0363
0.75	270	0.4803	0.4882	0.0623
0.85	126	0.4323	0.8247	0.0576
0.85	150	-1.2693	0.6411	0.1475
0.85	162	-0.0358	0.6636	0.0303
0.85	174	-0.2405	0.6688	0.0406
0.85	210	0.0946	0.7652	0.0319
0.85	222	1.2805	0.6768	0.1487
0.85	234	-0.8404	0.4883	0.1002
0.85	246	0.0919	0.4448	0.0318
0.85	258	0.0806	0.3819	0.0314
0.85	270	-0.3752	0.4266	0.0522
0.85	282	0.5992	0.7136	0.0745
0.95	234	0.4647	0.6392	0.0608
0.95	246	0.2889	0.4599	0.0445
0.95	258	0.0644	0.485	0.0309