CLAS Physics Database

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Measurement E9M60

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Experiment: E-89-037 Electroproduction of the P33(1232) Resonance, 2002

Spokespersons: V. Burkert, R. Minehart

Experiment comment: Release 1 - Data replay: recsis prod-1-9. RC and acceptance: aao_rad+MAID98

Publication:

K. Joo, L. C. Smith, V. D. Burkert, R. Minehart, I. G. Aznauryan, L. Elouadrhiri, S. Stepanyan, and CLAS Collaboration Q² Dependence of Quadrupole Strength in the γ^*p --> Δ⁺(1232) --> pπ⁰ Transition // Phys. Rev. Let. 88, 122001 (2002)

Quantity measured: dσ/dΩ, mcbn/srad
Differential cross section.
Beam: e, polarization: none
Target: p (Z=1, A=1), polarization: none
Final state: π⁰p, polarization: none

Q² :	1.6 — 2 GeV²
W :	1.1 GeV
ε :	0.641

Select data slice:
cos(θ_π) = dimensionless

Fit φ dependence:

Observable quantity measured (Y axis): dσ/dΩ, mcbn/srad
Plot measurement data

Parameter (X axis): φ_π, deg

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Measured data:

cos(θ_π), dimensionless	φ_π, deg	dσ/dΩ, mcbn/srad	Data errors, mcbn/srad
-0.7	135	0.045	0.0614
-0.7	225	0.0943	0.122
-0.5	165	0.327	0.45
-0.5	195	0.99	1.16
-0.5	225	0.57	0.88
-0.3	105	0.984	1.2
-0.3	135	0.418	0.625
-0.3	165	1.1	1.14
-0.3	225	1	1.28
-0.1	105	0.0963	0.124
-0.1	135	0.249	0.319
-0.1	165	0.131	0.149
-0.1	195	1.66	1.37
-0.1	225	0.393	0.34
-0.1	285	0.0898	0.097
0.1	15	0.51	0.504
0.1	165	0.0351	0.0444
0.1	255	0.0084	0.0097
0.1	285	0.335	0.404
0.3	195	0.788	0.673
0.3	255	0.117	0.103
0.3	285	2.56	3.42
0.3	345	0.197	0.239
0.5	15	0.0514	0.063
0.5	45	0.197	0.261
0.5	105	0.081	0.0946
0.5	135	0.0249	0.0289
0.5	165	1.04	0.896
0.5	195	0.984	0.823
0.5	225	0.0841	0.0976
0.5	345	0.159	0.187
0.7	15	1.03	1.31
0.7	105	0.208	0.188
0.7	165	0.135	0.108
0.7	195	0.232	0.281
0.7	255	0.069	0.0682
0.7	285	0.305	0.431
0.9	255	1.29	1.66
0.9	285	1.24	1.78
0.9	345	0.386	0.454