CLAS Physics Database

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Measurement E151M205

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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 :	0.0496 GeV²
W :	1205 GeV
ε :	0.9438
E_beam :	1.3383 GeV
ε_L:	0.4272

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
0.45	282	0.1772	0.4525	0.0347
0.55	270	-0.4107	0.2782	0.0396
0.55	282	-0.1204	0.3399	0.0311
0.65	258	-0.4011	0.2963	0.0388
0.65	270	-0.2557	0.2606	0.0338
0.65	282	-0.3104	0.2884	0.0499
0.75	258	-0.1641	0.3036	0.0327
0.75	270	-0.0302	0.3003	0.0337
0.85	114	-0.6857	0.4814	0.051
0.85	126	0.4224	0.3894	0.0397
0.85	138	0.0729	0.3284	0.0324
0.85	150	0.489	0.3468	0.0444
0.85	162	-0.2266	0.254	0.0367
0.85	174	-0.3532	0.3027	0.0375
0.85	186	-0.7316	0.3031	0.0636
0.85	198	0.0246	0.3195	0.0348
0.85	210	-0.4409	0.3341	0.0566
0.95	138	0.3307	0.409	0.0363
0.95	150	-0.2106	0.3442	0.0327
0.95	162	0.6165	0.4034	0.0486
0.95	174	0.0894	0.3403	0.0305
0.95	186	-0.1384	0.3685	0.0312
0.95	198	-0.6142	0.3499	0.0484
0.85	270	-0.7717	0.3567	0.0553
0.95	138	-0.0579	0.4705	0.0302
0.95	150	0.7218	0.6871	0.0528
0.95	162	0.0717	0.5236	0.0303
0.95	174	0.2321	0.5934	0.0331
0.95	186	-0.8205	0.2599	0.0578
0.95	198	2.1328	2.1328	0.1319