CLAS Physics Database

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Measurement E151M291

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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 :	0.0143 GeV²
W :	1355 GeV
ε :	0.8862
E_beam :	1.3383 GeV
ε_L:	0.0476

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	42	1.2178	0.6114	0.0812
0.55	222	0.4649	0.5926	0.0416
0.55	234	0.2882	0.4608	0.0349
0.55	246	-0.3146	0.4611	0.0358
0.55	258	-0.4968	0.5393	0.043
0.65	138	-0.9118	0.5482	0.0639
0.65	150	0.1624	0.5952	0.0316
0.65	162	-0.3613	0.5888	0.0374
0.65	210	0.7432	0.6219	0.0549
0.65	222	-0.0819	0.4943	0.0304
0.65	234	-0.0564	0.4359	0.0302
0.65	246	0.7195	0.5134	0.0537
0.65	258	-0.226	0.5525	0.0331
0.75	126	-0.3666	0.603	0.0376
0.75	138	-0.045	0.5129	0.0301
0.75	150	-0.9272	0.4504	0.0648
0.75	210	0.4853	0.6382	0.0425
0.75	222	0.223	0.5494	0.033
0.75	234	-0.4417	0.4281	0.0406
0.75	246	-0.0122	0.4607	0.03
0.75	258	-0.9342	0.4526	0.0652
0.85	222	0.3237	0.5449	0.0361
0.85	234	-0.3168	0.4765	0.0358
0.85	246	-0.1178	0.3939	0.0309
0.85	258	0.2923	0.5432	0.035
0.35	42	-0.1145	0.8199	0.0308
0.45	42	0.1409	0.9524	0.0312
0.55	234	-1.2521	0.4734	0.0811
0.55	246	-0.1987	0.7679	0.0323
0.65	138	-0.7006	0.7003	0.0518
0.65	150	0.7024	1.1673	0.0519
0.65	222	-0.744	0.498	0.0539
0.65	234	-0.6884	0.4704	0.0512
0.65	246	-0.4201	0.6505	0.0392
0.75	126	0.2651	0.9862	0.034
0.75	138	-1.2108	0.5531	0.0788
0.75	150	-0.5845	0.7071	0.0462
0.75	222	-0.1728	0.6143	0.0318
0.75	234	-0.1012	0.4995	0.0306
0.75	246	-0.2851	0.5946	0.0346
0.75	258	0.5937	1.0191	0.0467
0.85	222	0.8099	1.0093	0.0573
0.85	234	0.0124	0.5531	0.03
0.85	246	0.9676	0.7802	0.0655
0.85	258	0.7534	0.8034	0.0544