CLAS Physics Database

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Measurement E151M123

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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 :	0.0023 GeV²
W :	1385 GeV
ε :	0.7727
E_beam :	1.0539 GeV
ε_L:	0.0057

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	0.4926	0.9173	0.0636
0.45	54	0.7253	0.6541	0.0878
0.45	222	0.2213	0.6572	0.0392
0.45	234	0.1246	0.8067	0.0332
0.55	42	-0.3284	0.6652	0.0479
0.55	54	0.102	0.5696	0.0322
0.55	66	0.7309	0.9229	0.0884
0.55	150	-0.2711	0.6771	0.043
0.55	162	1.0382	0.9251	0.1219
0.55	174	-0.941	0.7015	0.1112
0.55	210	0.3367	0.743	0.0487
0.55	222	0.6054	0.7173	0.0751
0.55	234	0.2211	0.485	0.0392
0.55	246	-0.3721	0.5741	0.0519
0.55	258	0.4198	0.8252	0.0564
0.65	18	-0.3391	0.7705	0.0489
0.65	30	1.9124	0.6295	0.2196
0.65	42	0.3181	0.5424	0.047
0.65	54	0.9576	0.4718	0.113
0.65	66	-0.5038	0.8015	0.0647
0.65	138	0.5318	0.8537	0.0675
0.65	150	0.1768	0.7558	0.0361
0.65	162	1.1677	0.7281	0.1362
0.65	174	-0.0095	0.7464	0.03
0.65	186	-1.8689	0.6087	0.2147
0.65	210	-0.0479	0.6807	0.0305
0.65	222	-0.2989	0.5443	0.0453
0.65	234	0.1063	0.4311	0.0323
0.65	246	0.0148	0.494	0.03
0.65	258	-0.2547	0.7338	0.0417
0.75	54	-0.1659	0.6749	0.0354
0.75	150	-1.0496	0.7222	0.1231
0.75	162	0.1196	0.7999	0.0329
0.75	186	-0.8859	0.7525	0.1052
0.75	210	0.2648	0.6244	0.0425
0.75	222	1.1023	0.5379	0.129
0.75	234	-0.3917	0.4399	0.0537
0.75	246	0.5171	0.5002	0.066
0.75	258	-0.9084	0.6975	0.1076
0.85	210	0.0327	0.7947	0.0302
0.85	222	0.6042	0.6261	0.075
0.85	234	-0.1213	0.5172	0.033
0.85	246	1.0343	0.5695	0.1214