CLAS Physics Database

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Measurement E151M26

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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 :	0.0205 GeV²
W :	1235 GeV
ε :	0.9092
E_beam :	1.0539 GeV
ε_L:	0.1483

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
0.25	30	-0.2383	0.5295	0.0404
0.25	42	0.8843	0.4951	0.105
0.25	54	0.1226	0.433	0.0331
0.35	30	0.5649	0.5548	0.0709
0.35	42	0.4855	0.4029	0.0629
0.35	54	-0.4152	0.4084	0.056
0.45	42	-0.1928	0.3585	0.0372
0.45	54	0.6631	0.4134	0.0812
0.45	66	-0.509	0.4809	0.0652
0.45	246	0.5219	0.5984	0.0665
0.45	258	1.0073	0.4821	0.1185
0.45	270	0.6801	0.3827	0.083
0.45	282	-0.2537	0.3722	0.0416
0.55	234	1.4654	0.5223	0.1694
0.55	246	0.4051	0.3702	0.055
0.55	258	-0.4387	0.2618	0.0582
0.55	270	0.2061	0.287	0.0381
0.55	282	0.0316	0.3394	0.0302
0.65	150	0.9065	0.5367	0.1074
0.65	162	-0.4635	0.5109	0.0607
0.65	174	0.8209	0.5806	0.0981
0.65	186	-0.0359	0.5148	0.0303
0.65	198	-0.481	0.5024	0.0624
0.65	234	0.1091	0.3832	0.0325
0.65	246	-0.449	0.2474	0.0592
0.65	258	-0.0602	0.2237	0.0308
0.65	270	0.4223	0.238	0.0566
0.65	282	-0.2893	0.3393	0.0445
0.75	138	-0.134	0.4915	0.0337
0.75	150	0.1676	0.4306	0.0355
0.75	162	-0.0605	0.366	0.0308
0.75	174	0.3369	0.3331	0.0487
0.75	186	0.2034	0.3359	0.0379
0.75	198	-0.3937	0.3194	0.0539
0.75	210	0.2024	0.4296	0.0378
0.75	222	0.0002	0.3794	0.03
0.75	234	0.0564	0.3317	0.0307
0.75	246	0.0337	0.2505	0.0302
0.75	258	-0.0715	0.2317	0.0311
0.75	270	-0.2031	0.2849	0.0379
0.75	282	-0.2354	0.3997	0.0402
0.85	138	-0.3919	0.4845	0.0537
0.85	150	0.6062	0.3848	0.0752
0.85	162	-0.1144	0.357	0.0327
0.85	174	-0.1064	0.2997	0.0324
0.85	186	0.3558	0.3728	0.0504
0.85	198	0.2471	0.38	0.0411
0.85	210	-0.8245	0.3681	0.0985
0.85	222	0.1198	0.4618	0.0329
0.85	234	0.6367	0.3609	0.0784
0.85	246	0.6973	0.3468	0.0848
0.85	258	0.2721	0.3328	0.0431
0.85	270	0.5389	0.4858	0.0683