CLAS Physics Database

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Measurement E151M2869

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

Q² :	0.0205 GeV²
W :	1565 GeV
ε :	0.6388
E_beam :	1.3383 GeV
ε_L:	0.0183

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_LU,
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_LU	Stat. error	Syst. error
0.45	30	-0.0378	0.244	0.03
0.45	42	0.5669	0.1754	0.0323
0.55	42	0.2279	0.2513	0.0303
0.55	210	-0.3711	0.249	0.0309
0.55	222	-0.074	0.2728	0.03
0.55	234	0.2503	0.2318	0.0304
0.65	138	-0.0196	0.2443	0.03
0.65	162	0.0366	0.2754	0.03
0.65	210	-0.0552	0.2737	0.03
0.65	222	-0.1531	0.2487	0.0302
0.65	234	-0.3789	0.2301	0.0309
0.75	222	0.0835	0.2731	0.03
0.75	234	-0.1332	0.274	0.0301
0.75	246	0.0653	0.2726	0.03
0.85	138	0.3895	0.2505	0.031
0.85	150	0.0269	0.2756	0.03
0.85	210	-0.359	0.2519	0.0308
0.85	234	-0.3051	0.2685	0.0306
0.45	54	0.1001	0.3531	0.0301
0.45	234	-0.4007	0.3041	0.0311
0.55	222	0.6043	0.2065	0.0323
0.55	234	0.1728	0.3788	0.0302
0.65	138	-0.3872	0.3629	0.031
0.65	210	-0.4094	0.2936	0.0311
0.65	222	-0.2674	0.3884	0.0305
0.65	234	0.1942	0.3312	0.0303
0.75	210	-0.4879	0.2644	0.0315
0.75	222	-0.2368	0.3205	0.0304
0.75	234	0.3655	0.2831	0.0309
0.85	222	-0.3901	0.341	0.031
0.85	234	0.0654	0.4098	0.03