CLAS Physics Database

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Measurement E151M1793

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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_LL,

Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁺n, polarization: none

Q² :	0.1715 GeV²
W :	1415 GeV
ε :	0.8872
E_beam :	1.9889 GeV
ε_L:	0.3203

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_LL,
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_LL	Stat. error	Syst. error
0.25	54	-2.4872	2.4872	0.1537
0.35	66	0.6834	0.7141	0.0511
0.35	78	-0.5633	0.7074	0.0454
0.35	282	0.5077	0.7005	0.043
0.35	294	1.1681	0.6343	0.0769
0.45	78	1.6948	0.7291	0.107
0.45	282	1.1452	0.7708	0.0756
0.45	294	-1.3513	0.7021	0.0872
0.55	66	-0.4504	0.8303	0.0406
0.55	102	1.2263	0.7852	0.0801
0.55	114	0.2127	0.8862	0.0327
0.55	270	-0.917	0.7101	0.0631
0.55	282	1.3403	0.7383	0.0866
0.65	66	-1.3103	0.7948	0.0849
0.65	102	0.2594	0.6318	0.0339
0.65	114	-0.3049	0.6783	0.0352
0.65	126	0.5471	0.8488	0.0447
0.65	246	-0.135	0.5802	0.0311
0.65	258	0.8424	0.6436	0.0592
0.65	270	-1.1668	0.7146	0.0768
0.75	90	-0.2539	0.6599	0.0337
0.75	102	0.571	0.6644	0.0458
0.75	114	1.1596	0.625	0.0764
0.75	126	0.5551	0.6389	0.0451
0.75	138	-1.5895	0.6244	0.1009
0.75	222	0.0244	0.8367	0.03
0.75	234	1.0123	0.6372	0.0683
0.75	246	0.9794	0.6323	0.0665
0.75	258	0.3084	0.5791	0.0353
0.75	270	-0.3331	0.6379	0.0362
0.85	78	0.0421	0.7627	0.0301
0.85	90	-0.6866	0.7867	0.0513
0.85	102	-0.2303	0.5172	0.0331
0.85	114	-0.6252	0.6584	0.0483
0.85	126	0.2246	0.5947	0.0329
0.85	138	0.5042	0.7452	0.0428
0.85	150	-0.0826	0.7779	0.0304
0.85	198	0.679	0.8384	0.0509
0.85	210	-0.0445	0.6626	0.0301
0.85	222	-0.1499	0.6358	0.0313
0.85	234	0.4943	0.5593	0.0424
0.85	246	0.2843	0.6043	0.0346
0.85	258	-0.0347	0.5315	0.0301
0.85	270	0.2651	0.5717	0.034
0.85	282	-0.2149	0.546	0.0327
0.85	294	0.1502	0.7411	0.0314
0.95	78	0.8653	0.5063	0.0604
0.95	114	0.809	0.775	0.0575
0.95	234	-0.0452	0.588	0.0301
0.95	246	0.7157	0.5691	0.0527
0.95	258	-0.3977	0.5161	0.0385
0.95	270	0.052	0.5024	0.0302
0.95	282	0.5106	0.476	0.0431