CLAS Physics Database

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Measurement E151M229

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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 :	0.1715 GeV²
W :	1235 GeV
ε :	0.866
E_beam :	1.3383 GeV
ε_L:	0.7849

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
0.45	270	0.6182	0.8723	0.0478
0.45	282	0.4864	0.7193	0.0419
0.45	294	0.5471	0.8753	0.0446
0.55	270	-0.5293	0.4741	0.0438
0.55	282	-0.6166	0.4569	0.0477
0.55	294	-0.8267	0.4244	0.0581
0.65	258	-0.2923	0.4978	0.0348
0.65	270	-0.0578	0.5097	0.0302
0.65	282	1.1984	0.73	0.0782
0.75	258	-0.0319	0.6229	0.0301
0.75	270	-0.6763	0.3867	0.0506
0.75	282	-0.2951	0.4837	0.0349
0.75	294	-0.3509	0.4787	0.0367
0.85	90	-0.1616	0.6698	0.0315
0.85	102	0.3492	0.7875	0.0366
0.85	114	0.5135	0.7815	0.0431
0.85	126	-0.7827	0.493	0.0559
0.85	138	-0.0408	0.7835	0.0301
0.85	258	-0.5047	0.4512	0.0427
0.95	90	0.4052	0.8321	0.0387
0.95	102	-0.0716	0.5335	0.0303
0.95	114	1.3827	0.886	0.0885
0.95	126	0.4697	0.8296	0.0412
0.95	138	-0.2578	0.5781	0.0338
0.95	150	0.1936	0.6826	0.0322
0.95	162	-0.675	0.4575	0.0505
0.95	186	0.0105	0.6518	0.03
0.35	282	-0.4964	0.49	0.043
0.35	294	-0.2169	0.4733	0.0329
0.45	282	-0.2099	0.4597	0.0327
0.55	258	0.1209	0.5326	0.0309
0.55	270	0.2843	0.4372	0.0348
0.55	282	-0.6073	0.4317	0.0481
0.55	294	0.1887	0.5154	0.0322
0.65	258	0.1247	0.4351	0.031
0.65	270	-0.134	0.519	0.0311
0.65	282	-0.0169	0.429	0.03
0.65	294	-0.0497	0.4011	0.0302
0.75	258	-0.3427	0.419	0.0367
0.75	270	0.5403	0.3765	0.0449
0.75	282	0.184	0.4575	0.0321
0.75	294	-0.0985	0.4674	0.0306
0.85	90	-0.9971	0.4287	0.0686
0.85	102	-0.321	0.4218	0.036
0.85	114	0.4261	0.3946	0.04
0.85	126	0.6558	0.4359	0.0505
0.85	138	-0.583	0.4196	0.0469
0.85	258	0.8131	0.4245	0.0586
0.85	270	-0.372	0.434	0.0378
0.85	282	-0.0536	0.4046	0.0302
0.95	90	0.041	0.4425	0.0301
0.95	102	0.0593	0.4568	0.0302
0.95	114	-0.2948	0.3574	0.0351
0.95	126	-0.0446	0.3903	0.0301
0.95	138	0.0308	0.3907	0.0301
0.95	150	-0.0888	0.4307	0.0305
0.95	162	0.4046	0.4132	0.0391
0.95	174	-0.4814	0.3913	0.0423
0.95	198	0.1802	0.44	0.032