CLAS Physics Database

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Measurement E40M29

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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 :	0.187 — 0.317 GeV²
W :	1.4 — 1.5 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	0.847	0.55	0.0849
0.1	-168	0.494	0.668	0.0735
0.7	-168	-0.186	0.388	0.0871
-0.9	-144	-0.39	0.355	0.0805
-0.7	-144	-0.137	0.188	0.0161
-0.5	-144	-0.184	0.205	0.0124
-0.3	-144	-0.231	0.13	0.017
-0.1	-144	-0.245	0.159	0.0227
0.1	-144	0.34	0.172	0.0311
0.3	-144	-0.035	0.167	0.0178
0.5	-144	0.063	0.353	0.0369
0.7	-144	-0.678	0.369	0.1618
-0.9	-120	-0.255	0.431	0.0993
-0.7	-120	0.143	0.13	0.0268
-0.5	-120	-0.484	0.165	0.0289
-0.3	-120	-0.313	0.168	0.0276
-0.1	-120	-0.123	0.089	0.0205
0.1	-120	0.05	0.122	0.0323
0.3	-120	0.043	0.127	0.0272
0.5	-120	0.397	0.403	0.1881
0.7	-120	0.098	0.243	0.0489
-0.9	-96	-0.144	1.167	0.3259
-0.7	-96	0.021	0.124	0.0257
-0.5	-96	0.124	0.137	0.029
-0.3	-96	-0.033	0.1	0.026
-0.1	-96	-0.149	0.126	0.0286
0.1	-96	-0.046	0.114	0.0227
0.3	-96	-0.246	0.108	0.0304
0.5	-96	-0.32	0.177	0.0487
-0.9	-72	-0.015	0.295	0.0383
-0.7	-72	-0.267	0.15	0.0455
-0.5	-72	-0.167	0.095	0.027
-0.3	-72	-0.185	0.092	0.0236
-0.1	-72	-0.184	0.096	0.0233
0.1	-72	-0.132	0.113	0.0204
-0.7	-48	0.084	0.162	0.0346
-0.5	-48	-0.053	0.12	0.0242
-0.3	-48	0.075	0.119	0.0189
-0.7	-24	0.015	0.247	0.0383
-0.5	-24	-0.344	0.333	0.0995
-0.3	-24	0.072	0.215	0.0155
-0.9	0	-1.546	6.741	0.9193
-0.7	0	0.516	0.381	0.0956
-0.5	0	0.076	0.342	0.0147
-0.7	24	-0.034	0.164	0.0361
-0.5	24	-0.032	0.196	0.023
-0.3	24	0.165	0.46	0.0793
-0.9	48	-0.288	0.313	0.0841
-0.7	48	0.174	0.191	0.0453
-0.5	48	0.036	0.141	0.0247
-0.3	48	0.038	0.107	0.0164
-0.9	72	-0.004	0.384	0.0641
-0.7	72	0.062	0.14	0.0307
-0.5	72	0.197	0.099	0.0263
-0.3	72	0.118	0.122	0.0225
-0.1	72	0.072	0.091	0.0178
0.1	72	-0.044	0.108	0.0187
-0.9	96	0.104	0.18	0.0353
-0.7	96	-0.193	0.217	0.0394
-0.5	96	0.225	0.158	0.0273
-0.3	96	-0.053	0.125	0.0199
-0.1	96	0.166	0.105	0.0216
0.1	96	0.13	0.106	0.0232
0.3	96	-0.142	0.098	0.0282
0.5	96	0.239	0.152	0.0296
-0.9	120	-0.337	0.271	0.0969
-0.7	120	-0.054	0.317	0.0199
-0.5	120	-0.036	0.166	0.0171
-0.3	120	-0.007	0.127	0.0208
-0.1	120	-0.093	0.101	0.0207
0.1	120	-0.109	0.09	0.022
0.3	120	-0.063	0.119	0.0281
0.5	120	-0.276	0.138	0.0519
0.7	120	-0.902	1.7	8.4983
-0.9	144	0.341	0.278	0.0658
-0.7	144	0.19	0.307	0.019
-0.5	144	-0.162	0.196	0.019
-0.3	144	0.117	0.117	0.0095
-0.1	144	-0.062	0.16	0.0097
0.1	144	-0.118	0.204	0.0158
0.3	144	-0.159	0.418	0.0345
0.5	144	-0.162	0.176	0.0398
0.7	144	0.282	0.677	0.1168
-0.9	168	-0.047	0.628	0.0336
0.1	168	-0.062	0.24	0.0153
0.3	168	-0.265	0.194	0.0355
0.7	168	-1.194	3.192	4.9067