CLAS Physics Database

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Measurement E151M2019

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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 :	0.205 GeV²
W :	1385 GeV
ε :	0.9171
E_beam :	2.2596 GeV
ε_L:	0.4286

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
0.65	102	0.121	0.7887	0.031
0.65	246	1.311	0.7251	0.0904
0.65	258	-0.3742	0.6495	0.0386
0.75	90	0.6636	0.6445	0.0526
0.75	102	0.7295	0.5577	0.0561
0.75	114	0.5253	0.7054	0.0455
0.75	246	0.6434	0.6932	0.0515
0.75	258	-0.7708	0.6645	0.0584
0.75	270	-1.4514	0.6721	0.0991
0.85	90	0.8751	0.8	0.0643
0.85	102	-1.4793	0.6398	0.1008
0.85	114	-0.2376	0.702	0.0337
0.85	126	-1.0673	0.7331	0.0756
0.85	222	2.0684	0.7276	0.1379
0.85	234	-0.1118	0.915	0.0309
0.85	246	0.1615	0.8533	0.0318
0.85	258	0.405	0.6937	0.0399
0.85	270	0.822	0.7084	0.0613
0.85	282	-0.5379	0.6608	0.0461
0.85	294	-0.2905	0.7042	0.0355
0.95	114	-1.3911	1.2833	0.0953
0.95	234	1.9149	1.1391	0.1281
0.95	246	-1.0381	1.3345	0.0739
0.95	258	-3.4865	0.9803	0.2288
0.95	270	-0.8789	1.0821	0.0646
0.95	282	-0.0521	1.165	0.0302
0.95	294	0.7097	0.9445	0.0551
0.25	66	0.3314	1.1925	0.0428
0.75	90	0.3805	1.2284	0.0461
0.75	102	-1.4268	1.2104	0.1345
0.75	114	1.1889	1.1617	0.1133
0.75	234	-0.3067	1.2947	0.0412
0.75	246	1.8376	1.2377	0.1715
0.75	258	0.3125	1.1252	0.0415
0.75	270	-0.1021	1.149	0.0314
0.85	90	0.7108	1.448	0.0719
0.85	102	0.2279	1.3772	0.0366
0.85	114	2.6717	1.2728	0.2474
0.85	126	1.8067	1.5941	0.1687
0.85	234	1.3184	1.2112	0.1248
0.85	258	-0.2528	1.1882	0.0379
0.85	270	-1.7539	1.0641	0.164
0.85	282	0.1051	1.2244	0.0315
0.95	114	-0.1097	4.255	0.0316
0.95	234	-0.6995	3.7405	0.0709
0.95	246	-1.071	3.6902	0.1029
0.95	270	0.3725	3.8915	0.0455
0.95	282	1.987	3.0143	0.1851
0.95	294	0.4199	3.5074	0.0489