CLAS Physics Database

Your browser does not support JavaScript or JavaScript is turned off in your browser. It is strongly recommended to turn JavaScript on in order to view this page. Some features may not work if JavaScript is turned off.

Measurement E151M414

You are not logged in.

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 :	0.0707 GeV²
W :	1535 GeV
ε :	0.6413
E_beam :	1.3383 GeV
ε_L:	0.0668

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
0.55	138	-0.2616	0.6986	0.0341
0.55	210	0.6962	1.2564	0.0516
0.55	222	-0.0591	0.558	0.0397
0.55	234	-0.0147	0.5698	0.0649
0.55	246	-0.4154	0.487	0.0396
0.65	138	-1.166	0.4125	0.0772
0.65	150	-0.9061	0.4495	0.0631
0.65	162	-0.0432	0.6489	0.0301
0.65	210	1.233	1.1659	0.0801
0.65	222	0.6016	0.4791	0.0484
0.65	234	0.5932	0.5026	0.0503
0.65	246	1.0196	0.557	0.0695
0.75	138	-1.3017	0.5382	0.086
0.75	150	-0.3626	0.7068	0.0375
0.75	162	-0.0043	0.7206	0.03
0.75	222	1.0424	0.6307	0.0712
0.75	234	-0.9343	0.4974	0.0776
0.75	246	0.0221	0.4829	0.0398
0.85	222	0.9384	0.6327	0.0654
0.85	234	1.6409	0.5261	0.1059
0.85	246	0.7569	0.6125	0.0556
0.95	114	0.9394	0.6228	0.0654
0.95	126	1.1106	0.5891	0.075
0.95	234	0.5584	0.5929	0.0458
0.75	258	0.4736	0.9809	0.0414
0.85	222	0.8034	1.1598	0.0569
0.85	234	-0.6407	0.5482	0.0489
0.85	246	1.2591	1.0496	0.0815
0.85	258	-0.1745	0.9168	0.0318