CLAS Physics Database

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Measurement E40M15

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Experiment: EG1, 2000

Spokespersons: P. Stoler, V. Burkert, R. Minehart

Publication:

A. S. Biselli, V. D. Burkert, and CLAS Collaboration First measurement of target and double spin asymmetries for polarized e- polarized p → e p π⁰ in the nucleon resonance region above the Δ(1232) // PRC 78, 045204 (2008)

Quantity measured: A_et, dimensionless
Double spin asymmetry A_et=(dσ_et/dΩ^*)/(dσ₀/dΩ^*).
Beam: e, polarization: polarized
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁰p, polarization: none

Q² :	0.317 — 0.452 GeV²
W :	1.5 — 1.6 GeV

Select data slice:
cos(θ) = dimensionless

Observable quantity measured (Y axis): A_et, dimensionless
Plot measurement data

Parameter (X axis): φ, degrees

Click here to get data in text file, delimited with tabs.

Measured data:

cos(θ), dimensionless	φ, degrees	A_et, dimensionless	Data errors, dimensionless	Systematic errors, dimensionless
-0.1	-168	0.409	0.456	0.0906
0.5	-168	1.117	1.187	0.2455
0.7	-168	2.338	3.908	2.3397
-0.7	-144	-0.169	0.531	0.0855
-0.5	-144	0.602	0.299	0.0884
-0.3	-144	0.566	0.36	0.0901
-0.1	-144	0.201	0.251	0.0743
0.1	-144	0.658	0.319	0.0719
0.3	-144	0.475	0.783	0.1335
0.5	-144	0.116	0.436	0.0437
0.7	-144	-0.913	7.743	0.5426
-0.9	-120	0.627	0.396	0.0779
-0.7	-120	0.378	0.404	0.0734
-0.5	-120	0.249	0.229	0.0776
-0.3	-120	0.197	0.241	0.0739
-0.1	-120	0.548	0.186	0.0639
0.1	-120	0.37	0.264	0.0663
0.3	-120	0.2	0.368	0.0565
0.5	-120	0.525	0.322	0.0691
0.7	-120	0.401	0.412	0.0736
-0.9	-96	-0.147	0.281	0.0265
-0.7	-96	0.078	0.248	0.0489
-0.5	-96	0.447	1.218	0.0802
-0.3	-96	0.276	0.234	0.0584
-0.1	-96	0.73	0.227	0.0706
0.1	-96	0.041	0.158	0.0431
0.3	-96	-0.125	0.198	0.0519
0.5	-96	0.451	0.303	0.0607
0.7	-96	1.262	0.889	0.4444
0.9	-96	-0.329	0.575	0.1051
-0.9	-72	-0.151	0.318	0.0108
-0.7	-72	0.087	0.216	0.0344
-0.5	-72	0.426	0.328	0.0647
-0.3	-72	0.344	0.229	0.0648
-0.1	-72	0.072	0.176	0.0598
0.1	-72	0.081	0.166	0.0461
0.3	-72	0.301	0.185	0.0469
-0.9	-48	-0.228	0.499	0.0475
-0.7	-48	0.402	0.268	0.045
-0.5	-48	0.137	0.209	0.0595
-0.3	-48	-0.164	0.199	0.0653
-0.1	-48	0.211	0.127	0.0611
0.1	-48	0.088	0.201	0.0652
-0.9	-24	-0.523	0.515	0.0621
-0.7	-24	-0.224	1.059	0.0564
-0.5	-24	-0.284	0.237	0.0609
-0.3	-24	0.021	0.181	0.0662
-0.1	-24	0.084	0.203	0.0715
-0.9	0	0.554	0.943	0.179
-0.7	0	0.901	1.89	0.7722
-0.5	0	-0.65	0.319	0.0729
-0.3	0	0.075	0.216	0.0742
-0.1	0	0.207	0.153	0.084
-0.9	24	-0.955	1.079	0.2598
-0.7	24	-0.135	0.549	0.0421
-0.5	24	0.098	0.368	0.0683
-0.3	24	0.215	0.21	0.0638
-0.1	24	0.343	0.174	0.0789
-0.9	48	-0.694	0.595	0.0953
-0.7	48	0.326	0.245	0.0575
-0.5	48	0.247	0.211	0.0637
-0.3	48	0.123	0.176	0.0674
-0.1	48	0.014	0.149	0.0657
0.1	48	0.188	0.178	0.0666
-0.9	72	-0.056	0.283	0.0113
-0.7	72	0.104	1.398	0.1052
-0.5	72	-0.316	0.355	0.0834
-0.3	72	-0.029	0.172	0.0591
-0.1	72	0.286	0.144	0.0589
0.1	72	0.292	0.132	0.0536
0.3	72	-0.025	0.17	0.049
-0.9	96	-0.08	0.399	0.0193
-0.7	96	0.438	0.23	0.0445
-0.5	96	0.578	0.362	0.0723
-0.3	96	0.293	0.192	0.0539
-0.1	96	0.178	0.164	0.0525
0.1	96	0.289	0.171	0.0527
0.3	96	0.543	0.787	0.0781
0.5	96	0.036	0.194	0.0369
0.7	96	-0.306	0.755	0.0807
-0.9	120	0.669	0.486	0.099
-0.7	120	0.634	0.429	0.0766
-0.5	120	0.399	0.284	0.0612
-0.3	120	0.112	0.176	0.0656
-0.1	120	0.088	0.161	0.0658
0.1	120	0.524	0.233	0.0664
0.3	120	0.086	0.229	0.0556
0.5	120	-0.288	1.302	0.1017
0.7	120	0.466	0.781	0.2021
-0.7	144	0.561	1.185	0.0605
-0.5	144	-0.843	8.563	0.2823
-0.3	144	0.513	0.262	0.0827
-0.1	144	0.414	0.238	0.0734
0.1	144	0.59	0.252	0.0789
0.3	144	-0.082	0.244	0.0608
0.5	144	0.505	0.391	0.076
0.7	144	0.879	0.512	0.1194
-0.1	168	1.382	0.646	0.1204
0.1	168	0.664	0.325	0.0951
0.3	168	0.232	0.225	0.0747
0.5	168	0.657	0.386	0.1008
0.7	168	2.071	1.438	0.8828