CLAS Physics Database

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Measurement E40M38

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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 :	0.317 — 0.452 GeV²
W :	1.5 — 1.6 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
-0.1	-168	-0.07	0.303	0.0184
0.5	-168	-0.006	0.583	0.0309
0.7	-168	-2.501	3.595	2.3275
-0.7	-144	0.135	0.406	0.0187
-0.5	-144	0.367	0.202	0.04
-0.3	-144	0.147	0.236	0.0188
-0.1	-144	-0.127	0.177	0.0166
0.1	-144	0.596	0.274	0.0533
0.3	-144	1.2	0.75	0.1639
0.5	-144	0.802	0.396	0.0756
-0.9	-120	-0.058	0.261	0.032
-0.7	-120	0.147	0.28	0.0067
-0.5	-120	0.212	0.167	0.0321
-0.3	-120	0.219	0.173	0.0362
-0.1	-120	0.284	0.13	0.0334
0.1	-120	0.195	0.183	0.0393
0.3	-120	0.709	0.416	0.0775
0.5	-120	0.027	0.209	0.0476
0.7	-120	0.43	0.289	0.0505
-0.9	-96	0.118	0.204	0.0368
-0.7	-96	0.265	0.186	0.0418
-0.5	-96	0.217	1.318	0.0772
-0.3	-96	0.271	0.171	0.0428
-0.1	-96	0.168	0.156	0.0482
0.1	-96	0.124	0.114	0.0321
0.3	-96	0.043	0.142	0.0422
0.5	-96	0.134	0.216	0.0421
0.7	-96	-0.232	0.579	0.2105
0.9	-96	-0.22	0.395	0.058
-0.9	-72	-0.004	0.232	0.0507
-0.7	-72	0.017	0.154	0.0613
-0.5	-72	0.206	0.23	0.065
-0.3	-72	0.259	0.168	0.0582
-0.1	-72	-0.059	0.125	0.0479
0.1	-72	-0.211	0.119	0.037
0.3	-72	-0.063	0.13	0.0301
-0.9	-48	-0.818	0.434	0.1146
-0.7	-48	-0.26	0.176	0.0771
-0.5	-48	-0.384	0.147	0.0747
-0.3	-48	0.204	0.148	0.0673
-0.1	-48	0.057	0.091	0.0501
0.1	-48	-0.132	0.142	0.0453
-0.9	-24	-0.351	0.336	0.0448
-0.7	-24	-0.679	3.598	0.1358
-0.5	-24	0.055	0.168	0.0556
-0.3	-24	-0.228	0.126	0.0458
-0.1	-24	0.064	0.146	0.0357
-0.9	0	0.127	0.572	0.0373
-0.7	0	1.357	2.195	1.1771
-0.5	0	0.314	0.224	0.0292
-0.3	0	0.085	0.157	0.0092
-0.1	0	0.052	0.109	0.0068
-0.9	24	-0.376	0.645	0.1108
-0.7	24	-0.454	0.434	0.098
-0.5	24	0.314	0.306	0.0676
-0.3	24	-0.077	0.148	0.0451
-0.1	24	-0.115	0.121	0.0419
-0.9	48	0.011	0.396	0.0519
-0.7	48	0.007	0.167	0.0827
-0.5	48	0.157	0.153	0.0791
-0.3	48	-0.021	0.125	0.0675
-0.1	48	0.085	0.108	0.055
0.1	48	0.014	0.127	0.0439
-0.9	72	-0.25	0.212	0.0563
-0.7	72	0.257	0.705	0.0853
-0.5	72	0.009	0.174	0.066
-0.3	72	-0.1	0.121	0.0548
-0.1	72	0.191	0.107	0.0527
0.1	72	0.023	0.093	0.0408
0.3	72	-0.203	0.119	0.033
-0.9	96	-0.142	0.282	0.0425
-0.7	96	-0.335	0.148	0.0383
-0.5	96	-0.481	0.241	0.0529
-0.3	96	-0.659	0.134	0.0411
-0.1	96	-0.281	0.112	0.0347
0.1	96	-0.232	0.117	0.0352
0.3	96	-0.6	0.379	0.0488
0.5	96	-0.194	0.132	0.0343
0.7	96	-0.116	0.345	0.043
-0.9	120	-0.463	0.305	0.0585
-0.7	120	-0.424	0.258	0.0297
-0.5	120	-0.896	0.206	0.0563
-0.3	120	-0.341	0.117	0.0252
-0.1	120	-0.462	0.109	0.0389
0.1	120	-0.238	0.142	0.0388
0.3	120	-0.313	0.12	0.0394
0.5	120	-0.811	0.552	0.0923
0.7	120	0.084	0.545	0.102
-0.7	144	-1.286	1.091	0.1194
-0.5	144	-0.582	1.716	0.0611
-0.3	144	-0.478	0.159	0.0394
-0.1	144	-0.589	0.156	0.0364
0.1	144	-0.295	0.157	0.0451
0.3	144	-0.753	0.179	0.0502
0.5	144	-0.091	0.252	0.0439
0.7	144	-0.612	0.34	0.0714
-0.1	168	-0.15	0.284	0.0165
0.1	168	-0.125	0.199	0.031
0.3	168	-0.192	0.154	0.0206
0.5	168	-0.284	0.261	0.0571
0.7	168	0.081	0.496	0.0634