CLAS Physics Database

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Measurement E151M52

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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 :	1265 GeV
ε :	0.8595
E_beam :	1.0539 GeV
ε_L:	0.2536

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
0.15	42	1.1483	0.6516	0.134
0.25	42	-0.1394	0.499	0.0339
0.35	30	0.3748	0.6131	0.0521
0.35	42	0.2077	0.4925	0.0382
0.35	54	-0.6078	0.5996	0.0754
0.45	42	0.9896	0.6818	0.1165
0.45	270	0.5666	0.5545	0.0711
0.45	282	0.3285	0.4419	0.0479
0.55	246	-1.4564	0.3434	0.1684
0.55	258	0.4976	0.4609	0.0641
0.55	270	0.478	0.3573	0.0621
0.55	282	0.6529	0.4134	0.0801
0.65	234	-0.1596	0.484	0.0351
0.65	246	0.0847	0.3613	0.0315
0.65	258	0.025	0.3207	0.0301
0.65	270	-0.0637	0.3038	0.0309
0.65	282	0.1563	0.3483	0.0349
0.75	138	-0.1594	0.4686	0.0351
0.75	150	0.6754	0.4991	0.0825
0.75	162	-0.0981	0.455	0.032
0.75	174	-0.6721	0.5015	0.0821
0.75	186	-0.0848	0.5767	0.0315
0.75	198	0.7824	0.5904	0.0939
0.75	210	-0.298	0.5663	0.0453
0.75	234	0.0958	0.5152	0.0319
0.75	246	0.1816	0.3444	0.0364
0.75	258	0.2146	0.3023	0.0387
0.75	270	-0.3316	0.3152	0.0482
0.75	282	-0.1201	0.3717	0.033
0.75	294	-0.0386	0.5327	0.0303
0.85	126	-0.2593	0.4313	0.0421
0.85	138	-0.3026	0.3984	0.0457
0.85	150	0.1908	0.3807	0.037
0.85	162	0.5633	0.3978	0.0708
0.85	174	-0.0705	0.3861	0.0311
0.85	186	0.0293	0.4008	0.0302
0.85	198	0.0383	0.4184	0.0303
0.85	210	0.0536	0.5107	0.0306
0.85	234	-0.2884	0.4034	0.0445
0.85	246	-0.0098	0.3503	0.03
0.85	258	-0.3353	0.2974	0.0485
0.85	270	-0.1133	0.3468	0.0327
0.85	282	-0.2145	0.421	0.0387
0.95	114	-0.6432	0.4199	0.0791
0.95	138	0.3038	0.451	0.0458
0.95	150	-0.2652	0.3856	0.0425
0.95	162	0.6295	0.4857	0.0776
0.95	174	-0.2109	0.3902	0.0384
0.95	186	0.131	0.4136	0.0335
0.95	198	0.2279	0.4431	0.0397
0.95	222	-0.3929	0.4494	0.0538
0.95	258	-0.5192	0.4237	0.0662