CLAS Physics Database

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Measurement E151M852

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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 :	1505 GeV
ε :	0.8813
E_beam :	2.2596 GeV
ε_L:	0.2198

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
0.25	66	-0.3203	1.425	0.0421
0.35	294	0.6381	1.1945	0.0661
0.55	102	-0.4026	1.4915	0.0478
0.55	114	-0.5639	1.5454	0.0601
0.65	102	1.966	1.5176	0.1839
0.65	114	-1.433	1.3599	0.1356
0.65	126	-0.3281	1.6039	0.0426
0.65	246	1.8729	1.5419	0.1754
0.65	294	0.3176	1.3463	0.0419
0.75	102	-0.8917	1.3536	0.0876
0.75	114	0.1265	1.6019	0.0322
0.75	126	0.0953	1.8004	0.0313
0.75	198	1.3763	1.7391	0.1305
0.75	222	2.8094	1.591	0.261
0.75	234	-0.5084	1.3784	0.0557
0.75	246	1.4908	1.583	0.1408
0.75	258	-2.2097	1.2022	0.2061
0.75	294	-1.7225	1.1425	0.1618
0.85	78	2.4695	2.0648	0.2299
0.85	102	-2.7127	1.5522	0.2522
0.85	126	-0.8213	1.7233	0.0815
0.85	138	-4.1911	1.4069	0.388
0.85	210	0.7813	1.8831	0.0781
0.85	234	0.8304	1.5461	0.0823
0.85	246	-1.0655	1.3838	0.1028
0.85	258	-1.4156	1.4182	0.134
0.85	270	-1.7131	1.4506	0.1609
0.95	246	11.0653	4.9367	1.0217
0.95	258	8.417	4.1578	0.7774
0.95	270	4.6339	4.6088	0.4287
0.95	282	7.9015	4.4433	0.7299
0.25	294	0.4348	0.593	0.0414
0.35	66	-0.6001	0.4726	0.0495
0.35	282	0.6528	0.5956	0.0523
0.45	282	-0.6946	0.4536	0.0546
0.45	294	-0.5057	0.4878	0.0447
0.55	114	-0.6961	0.566	0.0546
0.65	102	0.6655	0.6118	0.053
0.65	114	-0.7083	0.5239	0.0553
0.65	234	-0.1115	0.6066	0.0309
0.75	102	-0.1695	0.5566	0.032
0.75	114	-0.2157	0.5803	0.0332
0.75	126	-0.1825	0.6253	0.0323
0.75	222	1.8784	0.5797	0.1269
0.75	234	0.8811	0.7445	0.0651
0.75	246	1.6255	0.6508	0.1108
0.85	78	-0.4441	0.4685	0.0418
0.85	114	-1.2045	0.5614	0.0845
0.85	126	-1.7029	0.4334	0.1157
0.85	222	0.1882	0.705	0.0324
0.85	234	0.0365	0.5846	0.0301
0.85	246	0.8145	0.6434	0.0613
0.85	258	-0.0581	0.6696	0.0302
0.95	246	-0.0007	1.0093	0.03
0.95	270	0.4167	0.9189	0.0406
0.95	282	0.9308	0.9719	0.0681