CLAS Physics Database

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Measurement E40M44

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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_t, dimensionless
Target spin asymmetry A_t=(dσ_t/dΩ^*)/(dσ₀/dΩ^*).
Beam: e, polarization: polarized
Target: p (Z=1, A=1), polarization: longitudinal
Final state: π⁰p, polarization: none

Q² :	0.452 — 0.77 GeV²
W :	1.3 — 1.4 GeV

Select data slice:
cos(θ) = dimensionless

Observable quantity measured (Y axis): A_t, 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_t, dimensionless	Data errors, dimensionless	Systematic errors, dimensionless
-0.9	-168	-0.167	0.435	0.0523
-0.7	-168	-0.349	0.256	0.0319
-0.5	-168	0.042	0.21	0.0233
-0.3	-168	-0.205	0.268	0.0115
-0.1	-168	0.12	0.242	0.0051
0.9	-168	-0.143	0.375	0.0391
-0.9	-144	-1.242	0.74	0.364
-0.7	-144	-0.405	0.208	0.046
-0.5	-144	-0.535	0.207	0.0469
-0.3	-144	-0.395	0.126	0.0233
-0.1	-144	-0.444	0.157	0.0277
0.1	-144	-0.237	0.154	0.0167
0.3	-144	-0.415	0.147	0.0225
0.5	-144	-0.093	0.295	0.0187
0.7	-144	-0.281	0.39	0.0762
0.9	-144	-0.442	0.359	0.1221
-0.9	-120	-0.621	0.314	0.0969
-0.7	-120	-0.4	0.133	0.0296
-0.5	-120	-0.462	0.133	0.038
-0.3	-120	-0.344	0.111	0.0242
-0.1	-120	-0.196	0.1	0.0106
0.1	-120	-0.636	0.157	0.0467
0.3	-120	-0.429	0.15	0.0337
0.5	-120	-0.306	0.192	0.0376
0.7	-120	0.219	0.163	0.014
0.9	-120	-0.16	0.654	0.2127
-0.9	-96	-0.485	0.175	0.0429
-0.7	-96	-0.34	0.108	0.0228
-0.5	-96	-0.272	0.084	0.0154
-0.3	-96	-0.332	0.093	0.0229
-0.1	-96	-0.143	0.076	0.0074
0.1	-96	-0.084	0.078	0.0048
0.3	-96	-0.142	0.096	0.0105
0.5	-96	-0.257	0.128	0.0244
0.7	-96	0.056	0.149	0.0073
0.9	-96	0.134	0.426	0.0062
-0.9	-72	0.039	0.295	0.0185
-0.7	-72	-0.096	0.112	0.0097
-0.5	-72	-0.188	0.094	0.0141
-0.3	-72	-0.145	0.081	0.0096
-0.1	-72	0.037	0.074	0.0038
0.1	-72	-0.109	0.079	0.0075
0.3	-72	-0.153	0.093	0.012
0.5	-72	0.128	0.135	0.0067
0.7	-72	0.477	0.212	0.0499
0.9	-72	0.736	1.436	3.0848
-0.9	-48	-0.104	0.253	0.0202
-0.7	-48	0.185	0.155	0.0197
-0.5	-48	0.199	0.121	0.015
-0.3	-48	0.07	0.089	0.0071
-0.1	-48	-0.142	0.105	0.0121
0.1	-48	0.023	0.097	0.0039
0.3	-48	0.097	0.137	0.004
0.5	-48	0.015	0.176	0.0035
0.7	-48	0.285	0.174	0.0173
0.9	-48	-0.102	0.671	0.2185
-0.9	-24	-0.277	0.241	0.0548
-0.7	-24	0.068	0.169	0.0091
-0.5	-24	0.007	0.157	0.0069
-0.3	-24	0.081	0.117	0.0069
-0.1	-24	-0.1	0.119	0.007
0.9	-24	0.382	0.208	0.0415
-0.9	0	-0.635	0.939	0.9188
-0.7	0	-0.257	0.286	0.0777
-0.5	0	-0.301	0.115	0.0244
-0.3	0	-0.027	0.082	0.0017
-0.1	0	-0.091	0.111	0.0051
0.9	0	0.172	0.46	0.0695
-0.9	24	-1.167	1.432	2.2758
-0.7	24	-0.078	0.168	0.0199
-0.5	24	-0.176	0.168	0.0279
-0.3	24	-0.008	0.102	0.005
-0.1	24	-0.157	0.135	0.0086
0.9	24	-0.022	0.283	0.0053
-0.9	48	-0.181	0.274	0.0541
-0.7	48	-0.025	0.129	0.0085
-0.5	48	-0.032	0.084	0.0093
-0.3	48	-0.175	0.1	0.0125
-0.1	48	-0.074	0.086	0.0056
0.1	48	-0.05	0.095	0.0042
0.3	48	-0.301	0.106	0.0116
0.5	48	-0.099	0.157	0.0031
0.7	48	-0.363	0.172	0.027
-0.9	72	-0.205	0.179	0.0324
-0.7	72	-0.207	0.119	0.021
-0.5	72	0.19	0.086	0.0124
-0.3	72	0.115	0.086	0.0089
-0.1	72	0.109	0.072	0.0073
0.1	72	-0.02	0.082	0.0024
0.3	72	-0.001	0.091	0.0029
0.5	72	0.004	0.1	0.0041
0.7	72	-0.181	0.139	0.0117
0.9	72	0.353	0.748	0.3772
-0.9	96	0.146	0.302	0.0224
-0.7	96	0.149	0.114	0.0121
-0.5	96	0.142	0.095	0.0102
-0.3	96	0.272	0.095	0.0156
-0.1	96	0.119	0.09	0.0071
0.1	96	0.25	0.087	0.0117
0.3	96	0.217	0.109	0.0134
0.5	96	0.027	0.1	0.0048
0.7	96	-0.187	0.147	0.0141
0.9	96	-0.544	0.245	0.087
-0.9	120	0.235	0.207	0.0267
-0.7	120	0.379	0.168	0.0358
-0.5	120	0.504	0.178	0.0441
-0.3	120	0.52	0.159	0.0354
-0.1	120	0.23	0.141	0.016
0.1	120	0.351	0.17	0.0275
0.3	120	0.16	0.126	0.0116
0.5	120	-0.219	0.15	0.0148
0.7	120	-0.179	0.156	0.0127
0.9	120	-0.429	0.319	0.056
-0.9	144	0.323	0.269	0.0482
-0.7	144	0.657	0.257	0.0861
-0.5	144	0.587	0.167	0.0406
-0.3	144	0.22	0.152	0.013
-0.1	144	0.322	0.183	0.02
0.1	144	0.277	0.16	0.0145
0.3	144	0.298	0.255	0.0353
0.5	144	0.176	0.212	0.0174
0.7	144	0.902	0.663	0.2334
0.9	144	0.069	3.229	0.0729
-0.9	168	0.191	0.369	0.0382
-0.7	168	-1.18	0.912	0.4394
-0.5	168	0.229	0.31	0.027
-0.3	168	0.387	0.278	0.0278
-0.1	168	0.334	0.283	0.0287
0.9	168	0.186	0.61	0.0661