CLAS Physics Database

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Measurement E151M474

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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 :	0.0496 GeV²
W :	1235 GeV
ε :	0.9717
E_beam :	1.9889 GeV
ε_L:	0.352

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	Stat. error	Syst. error
0.45	78	-0.3429	0.3985	0.0366
0.55	78	1.066	0.456	0.0718
0.55	90	-0.0237	0.4261	0.03
0.55	270	-0.1863	0.5013	0.0321
0.65	90	-0.3707	0.4988	0.0376
0.65	246	-0.5282	0.442	0.0441
0.65	258	-0.4381	0.3349	0.0402
0.65	270	-0.1143	0.404	0.0308
0.75	114	0.7664	0.5593	0.0557
0.75	126	0.0449	0.4784	0.0301
0.75	138	1.6757	0.4176	0.1068
0.75	234	0.1209	0.5637	0.0309
0.75	246	-0.0767	0.3649	0.0304
0.75	258	-0.2149	0.3438	0.0328
0.75	270	0.3829	0.3724	0.0381
0.85	114	0.0558	0.454	0.0302
0.85	126	-0.1389	0.3487	0.0312
0.85	138	-0.0065	0.3593	0.03
0.85	150	-0.2637	0.3392	0.0341
0.85	162	-0.2599	0.3996	0.034
0.85	174	0.3081	0.4228	0.0354
0.85	186	-0.2406	0.4498	0.0334
0.85	234	-0.4357	0.4101	0.0401
0.85	246	0.4741	0.4364	0.0417
0.85	258	-0.4208	0.434	0.0395
0.95	126	0.7171	0.4947	0.0531
0.95	150	0.306	0.4353	0.0354
0.95	162	-0.2637	0.3954	0.0341
0.95	174	0.3709	0.5048	0.0376
0.95	186	0.4218	0.4511	0.0396