CLAS Physics Database

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Measurement E40M16

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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 :	1.6 — 1.7 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
-0.3	-168	0.667	0.67	0.0482
-0.1	-168	0.504	0.342	0.0165
0.1	-168	0.172	0.589	0.0304
0.3	-168	0.207	1.154	0.0358
0.5	-168	0.453	0.516	0.0346
-0.5	-144	-0.709	0.726	0.0547
-0.3	-144	0.706	1.492	0.2066
-0.1	-144	-0.185	0.381	0.0103
0.1	-144	0.704	0.565	0.046
0.3	-144	0.93	1.432	0.1344
0.7	-144	0.99	1.569	0.2567
-0.7	-120	0.073	0.791	0.0453
-0.5	-120	0.147	0.334	0.0142
-0.3	-120	0.023	1.342	0.053
-0.1	-120	-0.192	0.312	0.0326
0.1	-120	-0.573	1.572	0.0992
0.3	-120	0.401	0.426	0.0278
0.5	-120	0.292	0.406	0.0158
0.7	-120	-0.127	0.607	0.0266
-0.9	-96	0.3	0.499	0.0281
-0.7	-96	-1.387	0.812	0.1084
-0.5	-96	0.031	0.37	0.0075
-0.3	-96	-0.114	0.523	0.0098
-0.1	-96	-0.437	0.352	0.0278
0.1	-96	0.008	0.42	0.023
0.3	-96	0.315	0.244	0.0194
0.5	-96	1.378	0.761	0.2167
-0.9	-72	-0.241	0.525	0.0534
-0.7	-72	-0.331	0.438	0.0286
-0.5	-72	0.271	0.596	0.0331
-0.3	-72	-0.799	0.285	0.0398
-0.1	-72	-0.234	0.289	0.0157
0.1	-72	0.022	0.361	0.0083
0.3	-72	4.124	5.146	2.2397
-0.9	-48	-0.473	1.49	0.0671
-0.7	-48	-0.052	0.328	0.0197
-0.5	-48	-0.664	0.436	0.0469
-0.3	-48	-0.305	0.28	0.0197
-0.1	-48	-0.65	0.319	0.0418
0.1	-48	-0.72	0.691	0.1032
-0.9	-24	-0.178	0.386	0.0324
-0.7	-24	-0.528	0.346	0.0549
-0.5	-24	0.245	1.102	0.0324
-0.3	-24	-0.633	0.31	0.0469
-0.1	-24	-0.369	0.346	0.0252
-0.9	0	-0.068	0.659	0.0396
-0.7	0	-1.081	0.617	0.0962
-0.5	0	-0.779	0.39	0.0582
-0.3	0	-0.354	0.247	0.022
-0.1	0	0.379	0.145	0.0205
-0.9	24	0.647	0.791	0.0763
-0.7	24	-2.386	4.374	1.6217
-0.5	24	0.146	0.394	0.0341
-0.3	24	-0.104	3.929	0.1353
-0.1	24	0.268	0.251	0.0168
-0.7	48	0.021	0.267	0.008
-0.5	48	-0.579	0.444	0.0506
-0.3	48	-0.413	0.274	0.0204
-0.1	48	-0.613	0.201	0.0278
0.1	48	-0.192	0.313	0.0121
-0.9	72	1.056	1.012	0.1866
-0.7	72	-0.836	0.412	0.0591
-0.5	72	-0.211	0.296	0.0112
-0.3	72	-0.145	0.327	0.0223
-0.1	72	-0.471	0.239	0.0275
0.1	72	-0.461	0.223	0.0209
0.3	72	0.627	0.814	0.1087
-0.9	96	0.671	0.622	0.0352
-0.7	96	-0.306	0.466	0.04
-0.5	96	-0.814	0.445	0.0471
-0.3	96	-0.421	0.352	0.0304
-0.1	96	-0.08	0.308	0.0086
0.1	96	0.239	0.294	0.0138
0.3	96	0.267	0.64	0.0513
0.5	96	1.73	0.951	0.2866
-0.7	120	-0.353	0.597	0.0221
-0.5	120	-0.013	0.337	0.0106
-0.3	120	0.304	0.375	0.0292
-0.1	120	0.136	0.298	0.0084
0.1	120	0.317	0.223	0.0153
0.3	120	0.256	0.314	0.025
0.5	120	0.977	0.459	0.0981
0.7	120	-1.19	8.616	0.2844
-0.5	144	0.273	0.579	0.0224
-0.3	144	0.15	0.446	0.0167
-0.1	144	0.139	0.409	0.0245
0.1	144	0.649	0.357	0.0271
0.3	144	0.15	2.237	0.1071
0.5	144	1.276	1.028	0.2686
0.7	144	0.244	0.308	0.0176
-0.3	168	0.247	0.416	0.0189
-0.1	168	-0.283	0.536	0.0677
0.1	168	0.587	0.324	0.0317
0.3	168	-0.866	7.05	0.2486
0.5	168	0.317	0.405	0.029
0.7	168	1.131	0.677	0.227