CLAS Physics Database

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Measurement E151M409

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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 :	0.0291 GeV²
W :	1535 GeV
ε :	0.6788
E_beam :	1.3383 GeV
ε_L:	0.0308

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	18	-0.9963	0.6288	0.0671
0.45	30	0.3697	1.0453	0.0374
0.45	42	0.7822	1.2572	0.0558
0.45	210	-0.0141	1.0277	0.03
0.45	222	0.71	1.2215	0.0522
0.45	234	-0.6268	0.7987	0.0482
0.55	138	0.3178	1.1021	0.0356
0.55	150	-0.6201	0.9003	0.0479
0.55	210	0.0846	0.8874	0.0304
0.55	222	0.0569	0.8754	0.0302
0.55	234	0.0819	0.7729	0.0304
0.55	246	0.7176	1.1944	0.0526
0.65	138	-0.439	0.9177	0.04
0.65	162	-0.0091	1.0665	0.03
0.65	210	3.7467	3.7467	0.2276
0.65	222	1.7536	0.988	0.1098
0.65	234	0.344	0.8535	0.0365
0.65	246	2.1343	1.1523	0.132
0.75	162	-1.3252	0.568	0.0853
0.75	210	2.13	1.2191	0.1317
0.75	222	2.3801	2.3801	0.1464
0.75	234	0.4576	0.8428	0.0407
0.75	246	-0.4338	0.7217	0.0398
0.85	210	1.6033	1.3986	0.1011
0.85	222	0.0512	0.7416	0.0302
0.85	234	-0.1559	0.6619	0.0314
0.85	246	0.6306	0.9317	0.0484
0.95	234	3.0422	3.0422	0.1856
0.35	42	0.3817	0.6866	0.0382
0.45	30	-0.2739	0.6033	0.0345
0.45	42	0.1576	0.7108	0.0315
0.45	222	0.5579	0.6798	0.0458
0.55	138	-1.4392	0.5386	0.094
0.55	150	-0.5742	0.5783	0.0465
0.55	234	0.2241	0.6111	0.0331
0.65	138	-1.8929	0.4701	0.121
0.65	150	0.4976	0.6214	0.043
0.65	162	0.5733	0.6923	0.0465
0.65	210	-0.1469	0.6273	0.0313
0.65	222	0.5023	0.6225	0.0432
0.65	234	0.7818	0.5918	0.057
0.65	246	-0.2694	0.6325	0.0343
0.75	150	-0.9262	0.6568	0.0647
0.75	162	0.0978	0.6676	0.0306
0.75	210	0.5467	0.6415	0.0452
0.75	222	-0.1254	0.6411	0.031
0.75	234	1.0082	0.5762	0.0693
0.75	246	1.1486	0.5636	0.0772
0.85	138	1.5957	0.5937	0.1033
0.85	150	-1.1036	0.6328	0.0746
0.85	210	0.5544	0.6982	0.0456
0.85	222	-0.3042	0.6182	0.0354
0.85	234	0.7721	0.5744	0.0564