CLAS Physics Database

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Measurement E40M13

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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 :	1.3 — 1.4 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
-0.9	-168	0.216	0.277	0.0209
-0.7	-168	0.252	0.436	0.0288
-0.5	-168	0.207	0.393	0.0234
-0.3	-168	1.633	0.685	0.173
-0.9	-144	0.051	0.372	0.0085
-0.7	-144	0.195	0.2	0.0132
-0.5	-144	0.315	0.151	0.0199
-0.3	-144	0.07	0.258	0.0103
-0.1	-144	-0.02	0.206	0.0061
0.1	-144	-0.076	0.23	0.0107
0.3	-144	-0.287	0.193	0.0233
0.5	-144	-0.397	0.283	0.0632
0.7	-144	-0.135	0.34	0.0413
0.9	-144	-1.515	1.52	1.0687
-0.9	-120	-0.064	0.427	0.053
-0.7	-120	0.284	0.17	0.0233
-0.5	-120	0.079	0.126	0.0042
-0.3	-120	0.056	0.146	0.0087
-0.1	-120	-0.061	0.145	0.0098
0.1	-120	-0.097	0.155	0.0149
0.3	-120	-0.227	0.165	0.0174
0.5	-120	0.062	0.176	0.0047
0.7	-120	-0.261	0.302	0.0656
0.9	-120	-0.548	0.572	0.2002
-0.9	-96	0.18	0.306	0.0355
-0.7	-96	0.133	0.147	0.0117
-0.5	-96	-0.073	0.117	0.0067
-0.3	-96	-0.187	0.106	0.0154
-0.1	-96	-0.271	0.094	0.0135
0.1	-96	-0.25	0.123	0.0163
0.3	-96	-0.127	0.132	0.0097
0.5	-96	-0.357	0.166	0.0275
0.7	-96	-0.574	0.265	0.0729
0.9	-96	1.323	1.584	1.2486
-0.9	-72	-0.28	0.373	0.074
-0.7	-72	-0.517	0.184	0.0581
-0.5	-72	-0.282	0.142	0.0278
-0.3	-72	-0.114	0.102	0.0079
-0.1	-72	-0.488	0.117	0.0328
0.1	-72	-0.422	0.109	0.0224
0.3	-72	-0.411	0.122	0.0201
-0.9	-48	0.05	0.372	0.0182
-0.7	-48	0.002	0.154	0.0042
-0.5	-48	-0.458	0.139	0.0333
-0.3	-48	-0.18	0.121	0.0112
-0.9	-24	-0.537	0.55	0.1926
-0.7	-24	-0.44	0.178	0.0381
-0.5	-24	-0.206	0.207	0.0233
-0.9	0	-0.664	0.25	0.0709
-0.7	0	-0.509	0.295	0.089
-0.5	0	-0.681	0.236	0.0696
-0.9	24	-0.367	0.374	0.0775
-0.7	24	-0.498	0.237	0.0717
-0.5	24	-0.653	0.22	0.0755
-0.9	48	0	0.264	0.0098
-0.7	48	-0.451	0.163	0.0447
-0.5	48	-0.204	0.145	0.0209
-0.3	48	-0.231	0.106	0.0125
-0.9	72	0.02	0.243	0.0157
-0.7	72	-0.079	0.13	0.0076
-0.5	72	-0.274	0.125	0.0239
-0.3	72	-0.093	0.108	0.0069
-0.1	72	-0.36	0.097	0.0193
0.1	72	-0.322	0.127	0.0223
0.3	72	-0.091	0.124	0.0062
0.9	72	0.716	0.597	0.3613
-0.9	96	-0.006	0.31	0.0115
-0.7	96	0.431	0.181	0.0466
-0.5	96	0.1	0.136	0.0105
-0.3	96	0.009	0.112	0.0094
-0.1	96	0.002	0.1	0.0016
0.1	96	-0.092	0.104	0.0102
0.3	96	-0.1	0.114	0.0087
0.5	96	-0.19	0.165	0.02
0.7	96	-0.247	0.278	0.0538
0.9	96	0.009	0.463	0.0177
-0.9	120	0.374	0.336	0.0807
-0.7	120	0.036	0.21	0.0053
-0.5	120	0.122	0.146	0.0087
-0.3	120	-0.227	0.153	0.0167
-0.1	120	-0.237	0.149	0.0168
0.1	120	-0.205	0.164	0.0168
0.3	120	-0.247	0.154	0.0178
0.5	120	-0.61	0.238	0.0717
0.7	120	-0.216	0.264	0.042
0.9	120	0.29	0.51	0.1016
-0.9	144	0.345	0.394	0.0816
-0.7	144	0.863	0.28	0.1184
-0.5	144	0.635	0.222	0.0545
-0.3	144	0.514	0.252	0.0365
-0.1	144	0.353	0.267	0.0287
0.1	144	-0.177	0.265	0.0269
0.3	144	-0.02	0.212	0.0045
0.5	144	-0.361	0.239	0.0405
0.7	144	-0.164	0.268	0.0304
0.9	144	0.645	0.896	0.41
-0.9	168	4.009	3.894	4.4114
-0.7	168	0.641	0.276	0.0621
-0.5	168	0.459	0.367	0.0497
-0.3	168	0.557	0.9	0.1078