CLAS Physics Database

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Measurement E151M253

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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 :	0.0143 GeV²
W :	1295 GeV
ε :	0.9232
E_beam :	1.3383 GeV
ε_L:	0.0709

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
0.65	234	0.1604	0.6887	0.0315
0.65	246	-0.211	0.5462	0.0326
0.65	258	2.0377	2.0377	0.1263
0.75	150	-0.4581	0.5383	0.0408
0.75	162	-0.5834	0.6727	0.0462
0.75	174	0.7789	0.9937	0.0557
0.75	222	-0.7422	0.5016	0.0538
0.75	234	-0.5098	0.5196	0.0429
0.75	246	-0.1027	0.5031	0.0306
0.75	258	-0.431	0.5519	0.0397
0.75	270	1.0445	0.8514	0.0697
0.85	246	0.9417	0.6875	0.0642
0.85	258	0.0679	0.6508	0.0303
0.55	246	0.4719	0.5135	0.0419
0.65	234	-0.7069	0.3799	0.0531
0.65	246	0.408	0.4277	0.0392
0.65	258	-0.8436	0.4201	0.0602
0.65	270	-0.0541	0.4802	0.0302
0.75	150	-0.0157	0.5044	0.03
0.75	162	0.7698	0.5839	0.0563
0.75	222	0.0211	0.4897	0.03
0.75	234	0.1198	0.3985	0.0309
0.75	246	-0.3836	0.3631	0.0383
0.75	258	-0.4324	0.4249	0.0402
0.75	270	-0.1825	0.5358	0.0321
0.85	234	-0.5225	0.3969	0.0441
0.85	246	-0.6325	0.4023	0.0493
0.85	258	-0.6291	0.3852	0.0492