CLAS Physics Database

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Measurement E151M1855

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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_LL,

Beam: e, polarization: longitudinal
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁺n, polarization: none

Q² :	0.205 GeV²
W :	1535 GeV
ε :	0.8083
E_beam :	1.9889 GeV
ε_L:	0.2065

Select data slice:
cos(θ_π⁺) =

Observable quantity measured (Y axis): A_LL,
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_LL	Stat. error	Syst. error
0.35	282	-1.224	0.7882	0.08
0.35	294	-0.2095	0.8196	0.0326
0.45	282	-0.4147	0.867	0.0391
0.45	294	0.0054	0.8475	0.03
0.55	114	0.3063	0.9076	0.0353
0.55	306	0.3435	0.8135	0.0365
0.65	102	-0.7845	0.83	0.0562
0.65	114	0.7193	0.7208	0.0529
0.65	222	-1.137	0.8095	0.0751
0.65	234	-0.6047	0.8126	0.0474
0.75	102	0.6286	0.7376	0.0485
0.75	114	0.4604	0.7474	0.041
0.75	138	0.0045	0.9633	0.03
0.75	210	-1.5493	0.7545	0.0986
0.75	222	0.1719	0.8909	0.0318
0.75	234	-1.1748	0.7794	0.0772
0.75	246	-0.8629	0.7133	0.0603
0.75	258	-0.4869	0.8954	0.0421
0.85	78	-0.0504	0.8781	0.0302
0.85	90	0.0176	0.7506	0.03
0.85	138	0.9148	0.7586	0.063
0.85	210	0.7539	0.7919	0.0547
0.85	222	0.4701	0.6695	0.0414
0.85	234	0.6562	0.6482	0.0498
0.85	246	-0.0246	0.6349	0.03
0.85	258	1.1639	0.6757	0.0766
0.95	222	-0.4451	0.7684	0.0403
0.95	246	0.821	0.7257	0.0581
0.95	258	-0.5815	0.6367	0.0463
0.95	270	-0.1163	0.695	0.0308
0.95	282	1.617	0.6347	0.1025