CLAS Physics Database

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Measurement E151M2987

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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 :	0.2915 GeV²
W :	1355 GeV
ε :	0.8748
E_beam :	1.9889 GeV
ε_L:	0.5774

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
0.15	66	-0.3655	0.2673	0.0309
0.35	66	-0.1171	0.2863	0.0301
0.65	90	-0.3201	0.2317	0.0307
0.65	102	0.1969	0.2657	0.0303
0.65	258	-0.0924	0.237	0.0301
0.75	90	0.0857	0.2695	0.03
0.75	102	0.1626	0.2451	0.0302
0.75	126	0.3028	0.2555	0.0306
0.75	246	-0.2074	0.278	0.0303
0.75	258	0.1711	0.2619	0.0302
0.75	270	-0.2114	0.2673	0.0303
0.75	282	0.3575	0.2167	0.0308
0.85	90	-0.1623	0.2292	0.0302
0.85	102	-0.0289	0.2341	0.03
0.85	114	0.2332	0.2069	0.0304
0.85	222	0.0997	0.2595	0.0301
0.85	234	-0.5909	0.1962	0.0322
0.85	246	0.5164	0.2069	0.0317
0.85	258	-0.5201	0.1839	0.0318
0.85	270	0.0473	0.2284	0.03
0.85	282	0.3219	0.2276	0.0307
0.85	294	0.0936	0.19	0.0301
0.95	90	-0.1956	0.2495	0.0303
0.95	102	0.179	0.2619	0.0302
0.95	258	0.1705	0.2729	0.0302
0.95	270	-0.5677	0.2339	0.0321
0.95	282	-0.3337	0.2388	0.0307
0.95	294	0.0445	0.251	0.03
0.95	306	-0.1681	0.2352	0.0302