CLAS Physics Database

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Measurement E151M301

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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 :	0.0844 GeV²
W :	1355 GeV
ε :	0.84
E_beam :	1.3383 GeV
ε_L:	0.2309

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
0.55	258	0.2017	0.4991	0.0328
0.55	270	-0.1709	0.4329	0.0325
0.65	114	1.0369	0.6352	0.0709
0.65	126	-0.0729	0.4593	0.0596
0.65	138	-0.6854	0.4518	0.0578
0.65	234	-0.5944	0.4271	0.0559
0.65	246	-0.4247	0.3745	0.0404
0.65	258	-0.1647	0.376	0.0327
0.65	270	0.3334	0.4438	0.0466
0.75	114	-0.0161	0.4751	0.0312
0.75	126	-0.1836	0.3605	0.0322
0.75	138	0.8264	0.4059	0.0593
0.75	150	-0.5109	0.5473	0.0436
0.75	162	-0.27	0.6137	0.0343
0.75	222	0.5541	0.4492	0.0454
0.75	234	-0.3702	0.3379	0.038
0.75	246	-0.4261	0.318	0.0398
0.75	258	0.0372	0.3742	0.0372
0.75	270	-0.9167	0.286	0.0634
0.75	282	0.6853	0.5094	0.0523
0.85	114	-0.9056	0.3473	0.063
0.85	126	-0.5257	0.3363	0.0441
0.85	138	0.3711	0.3933	0.0408
0.85	150	0.1727	0.408	0.032
0.85	162	0.4162	0.5763	0.0395
0.85	174	-0.7525	0.6572	0.0543
0.85	222	0.0485	0.4584	0.0338
0.85	234	0.002	0.3742	0.0301
0.85	246	0.2588	0.3499	0.041
0.85	258	-0.302	0.3381	0.0491
0.85	270	-0.1489	0.3415	0.0343
0.85	282	-0.0468	0.3492	0.0442
0.95	78	-0.1513	0.5577	0.0314
0.95	90	0.2677	0.3729	0.0351
0.95	102	-0.0114	0.4035	0.0354
0.95	114	0.282	0.4438	0.0382
0.95	138	0.1538	0.731	0.0314
0.95	222	-0.1121	0.5232	0.0308
0.95	234	1.0268	0.4393	0.0701
0.95	246	-0.3112	0.2951	0.0363
0.95	258	-0.305	0.3727	0.0581
0.95	270	-0.2738	0.3066	0.0345
0.95	282	0.0065	0.3779	0.0308