CLAS Physics Database

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Measurement E151M659

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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 :	0.0844 GeV²
W :	1595 GeV
ε :	0.8139
E_beam :	1.9889 GeV
ε_L:	0.0792

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	Stat. error	Syst. error
0.45	78	1.6953	0.892	0.1079
0.45	282	0.4059	0.8622	0.0389
0.55	222	2.3653	0.7376	0.1477
0.55	270	2.029	0.7006	0.1277
0.55	282	-0.1509	0.7788	0.0314
0.65	126	-0.8169	0.6673	0.0583
0.65	150	-1.3289	0.6044	0.0866
0.65	198	-0.0874	0.8467	0.0305
0.65	210	0.134	0.8403	0.0311
0.65	222	0.5929	0.6791	0.0471
0.65	294	1.2259	0.73	0.0808
0.75	126	-0.4419	0.6802	0.0404
0.75	138	-0.6575	0.6865	0.0502
0.75	210	0.6687	0.8588	0.0507
0.75	222	0.9074	0.9015	0.0631
0.75	234	0.3124	0.5989	0.0356
0.75	246	0.3583	0.8662	0.0372
0.75	270	0.5274	0.7749	0.044
0.75	282	-0.1264	0.5866	0.031
0.75	294	0.8928	0.6591	0.0623
0.85	102	-0.8051	0.6358	0.0577
0.85	114	0.1768	0.7757	0.0319
0.85	210	-0.2129	0.7672	0.0327
0.85	222	0.038	0.5513	0.0301
0.85	234	0.592	0.6613	0.047
0.85	246	0.3663	0.7172	0.0374
0.95	234	0.4216	0.7734	0.0396