CLAS Physics Database

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Measurement E151M498

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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 :	0.2915 GeV²
W :	1265 GeV
ε :	0.9062
E_beam :	1.9889 GeV
ε_L:	0.9096

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	66	-0.0823	0.4957	0.0304
0.35	66	-0.6797	0.4959	0.0513
0.55	282	0.1893	0.5407	0.0322
0.65	270	0.8771	0.5408	0.0615
0.65	282	0.189	0.4295	0.0321
0.65	294	0.0503	0.5391	0.0302
0.75	78	0.4423	0.6373	0.0404
0.75	90	-0.5723	0.4357	0.0461
0.75	102	1.2384	0.5588	0.0815
0.75	258	1.3475	0.549	0.0877
0.75	270	-0.1502	0.5241	0.0314
0.75	282	-0.0312	0.4955	0.0301
0.75	294	-0.9486	0.4179	0.0653
0.85	66	-0.0036	0.6038	0.03
0.85	78	0.7042	0.4685	0.0525
0.85	90	0.5347	0.6936	0.0444
0.85	102	-0.3488	0.492	0.0368
0.85	114	-0.6143	0.4567	0.0481
0.85	246	-0.3962	0.4972	0.0386
0.85	258	0.2131	0.5331	0.0327
0.85	270	-0.0578	0.5468	0.0302
0.85	282	0.0734	0.4455	0.0303
0.85	294	0.8286	0.5262	0.0589
0.95	90	-0.023	0.483	0.03
0.95	126	-0.3785	0.4172	0.0379
0.95	150	-0.2977	0.5219	0.0351
0.95	294	1.2301	0.471	0.081