CLAS Physics Database

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Measurement E40M10

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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 :	1.15 — 1.2 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	0.579	0.198	0.035
-0.7	-168	-0.188	0.157	0.0099
-0.5	-168	-0.122	0.171	0.0075
-0.3	-168	-0.241	0.137	0.0091
-0.1	-168	-0.84	0.228	0.0597
0.1	-168	-0.634	0.213	0.046
0.3	-168	-0.887	0.135	0.0319
0.5	-168	-0.49	0.115	0.0173
0.7	-168	-0.2	0.116	0.0092
0.9	-168	-0.167	0.139	0.0095
-0.9	-144	0.24	0.151	0.0113
-0.7	-144	-0.095	0.123	0.0039
-0.5	-144	-0.197	0.141	0.0104
-0.3	-144	-0.442	0.138	0.0255
-0.1	-144	-0.567	0.103	0.0218
0.1	-144	-0.463	0.105	0.021
0.3	-144	-0.409	0.085	0.0139
0.5	-144	-0.249	0.08	0.0083
0.7	-144	-0.281	0.107	0.0149
0.9	-144	-0.031	0.138	0.002
-0.9	-120	0.109	0.141	0.0061
-0.7	-120	-0.092	0.122	0.0041
-0.5	-120	-0.462	0.1	0.0171
-0.3	-120	-0.253	0.08	0.0077
-0.1	-120	-0.478	0.085	0.0173
0.1	-120	-0.386	0.087	0.0155
0.3	-120	-0.379	0.083	0.0141
0.5	-120	-0.304	0.094	0.0129
0.7	-120	-0.406	0.12	0.0224
0.9	-120	-0.231	0.153	0.0144
-0.9	-96	-0.131	0.135	0.0076
-0.7	-96	-0.306	0.122	0.0149
-0.5	-96	-0.23	0.088	0.0078
-0.3	-96	-0.223	0.081	0.0075
-0.1	-96	0.007	0.086	0.0012
0.1	-96	-0.274	0.078	0.01
0.3	-96	-0.216	0.079	0.0072
0.5	-96	-0.221	0.083	0.008
0.7	-96	-0.065	0.096	0.0035
0.9	-96	0.058	0.139	0.0055
-0.9	-72	-0.197	0.14	0.011
-0.7	-72	-0.277	0.111	0.0107
-0.5	-72	-0.35	0.103	0.0114
-0.3	-72	-0.332	0.127	0.0148
0.9	-72	0.167	0.149	0.0116
-0.9	-48	-0.265	0.224	0.0286
-0.9	-24	-0.123	0.165	0.0095
-0.9	0	-0.203	0.226	0.0196
-0.9	24	-0.457	0.223	0.0464
-0.9	48	0.019	0.155	0.0058
-0.9	72	-0.144	0.12	0.0069
-0.7	72	-0.213	0.133	0.0151
-0.5	72	-0.267	0.103	0.0114
-0.3	72	-0.246	0.108	0.0108
0.9	72	0.27	0.169	0.0193
-0.9	96	0.138	0.122	0.0065
-0.7	96	-0.09	0.085	0.0027
-0.5	96	-0.116	0.082	0.0042
-0.3	96	-0.321	0.084	0.0128
-0.1	96	-0.347	0.088	0.0153
0.1	96	-0.175	0.073	0.0057
0.3	96	-0.215	0.079	0.0075
0.5	96	-0.215	0.082	0.008
0.7	96	-0.06	0.101	0.0038
0.9	96	0.223	0.191	0.0229
-0.9	120	0.178	0.149	0.0098
-0.7	120	-0.036	0.109	0.0023
-0.5	120	-0.315	0.087	0.0107
-0.3	120	-0.206	0.088	0.0082
-0.1	120	-0.3	0.082	0.0107
0.1	120	-0.32	0.087	0.0134
0.3	120	-0.233	0.088	0.0097
0.5	120	-0.408	0.099	0.0187
0.7	120	-0.072	0.095	0.0031
0.9	120	-0.098	0.207	0.0084
-0.9	144	0.314	0.13	0.012
-0.7	144	0.027	0.148	0.0037
-0.5	144	-0.276	0.115	0.0133
-0.3	144	-0.33	0.092	0.0117
-0.1	144	-0.297	0.103	0.0148
0.1	144	-0.499	0.102	0.0228
0.3	144	-0.499	0.105	0.0236
0.5	144	-0.342	0.105	0.0166
0.7	144	-0.222	0.113	0.0106
0.9	144	-0.099	0.16	0.0056
-0.9	168	0.348	0.168	0.0175
-0.7	168	0.108	0.153	0.0067
-0.5	168	-0.295	0.162	0.0158
-0.3	168	-0.527	0.125	0.0187
-0.1	168	-0.471	0.139	0.0212
0.1	168	-0.398	0.149	0.0213
0.3	168	-0.476	0.145	0.0233
0.5	168	-0.609	0.154	0.0315
0.7	168	-0.361	0.129	0.0156
0.9	168	-0.173	0.167	0.0102