CLAS Physics Database

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Measurement E151M1957

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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_LL,

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

Q² :	0.1435 GeV²
W :	1235 GeV
ε :	0.9626
E_beam :	2.2596 GeV
ε_L:	0.7828

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_LL,
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_LL	Stat. error	Syst. error
0.65	270	-4.708	1.7915	0.4337
0.65	282	3.7604	1.8132	0.3469
0.75	258	2.5485	2.3057	0.2361
0.75	270	2.4642	2.2719	0.2284
0.75	282	-0.5684	2.2864	0.0602
0.85	102	-2.8986	2.779	0.2681
0.85	114	2.5122	2.9277	0.2328
0.85	126	0.4497	3.2333	0.0511
0.95	102	-7.8299	8.3368	0.7202
0.95	126	-5.059	9.3339	0.4659
0.55	270	-0.4075	0.5341	0.04
0.55	282	-0.5654	0.4773	0.0475
0.65	270	-0.0703	0.5293	0.0303
0.65	282	0.7595	0.4755	0.0578
0.75	90	-1.1757	0.4953	0.0822
0.75	102	-0.1654	0.5959	0.0319
0.75	258	-0.1822	0.5578	0.0323
0.75	270	0.4942	0.4061	0.044
0.75	282	0.0656	0.4053	0.0303
0.85	78	-0.8984	0.5482	0.0657
0.85	90	0.0523	0.5312	0.0302
0.85	102	0.7686	0.4801	0.0583
0.85	114	0.3486	0.5424	0.0376
0.85	258	0.5024	0.6028	0.0444
0.85	282	-0.267	0.5983	0.0347
0.95	90	-0.2298	0.9401	0.0335
0.95	102	-0.9097	0.907	0.0663
0.95	114	-0.1201	0.8423	0.031
0.95	126	0.2272	0.7973	0.0334
0.95	138	0.3331	0.9467	0.037
0.95	150	-1.4701	0.9917	0.1002