CLAS Physics Database

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Measurement E151M731

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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 :	0.0707 GeV²
W :	1235 GeV
ε :	0.9751
E_beam :	2.2596 GeV
ε_L:	0.4745

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	Stat. error	Syst. error
0.45	78	0.1044	0.3527	0.0342
0.55	78	-0.1811	0.3774	0.0523
0.65	270	0.257	1.7492	0.0382
0.75	258	-0.4491	1.9947	0.0512
0.75	270	-1.3859	1.8702	0.1314
0.85	114	3.2287	3.2763	0.2995
0.85	126	-1.5659	2.2189	0.1476
0.85	138	-3.7694	2.5773	0.3492
0.85	150	-0.9906	3.0366	0.0962
0.95	126	-5.849	7.4094	0.5407
0.95	138	3.5106	8.2701	0.3254
0.95	150	1.9993	8.29	0.1869
0.95	162	-0.8251	7.1621	0.0818
0.55	270	0.3964	0.4754	0.0397
0.65	90	0.2367	0.4555	0.0338
0.65	270	0.7994	0.4555	0.0604
0.75	246	-0.3697	0.4216	0.0386
0.75	258	0.3092	0.4046	0.0362
0.75	270	0.6092	0.4021	0.05
0.85	126	0.3566	0.4604	0.038
0.85	138	0.3636	0.4503	0.0383
0.85	150	-0.1782	0.5565	0.0322
0.85	246	0.4584	0.4633	0.0425
0.85	258	-0.9513	0.3304	0.0693
0.95	114	2.2034	0.7787	0.1477
0.95	126	1.0612	0.8506	0.0758
0.95	150	-0.1921	0.6677	0.0325
0.95	162	-0.5104	0.7622	0.045
0.95	174	0.701	0.9402	0.0549
0.95	186	-0.1837	0.8767	0.0323