The Electric Dipole Amplitudes of the Neutral Pion Photoproduction on the Proton near Threshold

1994 ◽  
Vol 63 (1) ◽  
pp. 78-83 ◽  
Author(s):  
Byung Geel Yu ◽  
Il-Tong Cheon ◽  
Moon Taeg Jeong
Keyword(s):  
Electric Dipole ◽  
Neutral Pion ◽  
Pion Photoproduction ◽  
Near Threshold

THRESHOLD NEUTRAL PION PHOTOPRODUCTION ON THE PROTON AND THE CLOUDY BAG MODEL

1994 ◽  
Vol 09 (05) ◽  
pp. 399-409 ◽  
Author(s):  
A.N. TABACHENKO
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Electric Dipole ◽  
Neutral Pion ◽  
Chiral Symmetry Breaking ◽  
Additional Term ◽  
Pion Photoproduction ◽  
Differential Cross Sections ◽  
Neutral Pions ◽  
K Matrix

The energy dependence of the electric dipole amplitude, the total and differential cross-sections of the photoproduction of neutral pions off protons near threshold is given. The amplitude of process is a sum of the LET prediction and the additional term connected with the chiral symmetry breaking interaction. The simple K-matrix calculations are used to estimate the change in the electric dipole amplitude and the total and differential cross-sections between π0p and π+n thresholds.

Neutral pion photoproduction from the proton near threshold

1996 ◽  
Vol 368 (1-2) ◽  
pp. 20-25 ◽  
Author(s):  
M Fuchs ◽  
J Ahrens ◽  
G Anton ◽  
R Averbeck ◽  
R Beck ◽  
...  
Keyword(s):  
Neutral Pion ◽  
Pion Photoproduction ◽  
Near Threshold

Neutral Pion Photoproduction from Complex Nuclei Near Threshold

1979 ◽  
pp. 245-248
Author(s):  
F. L. Milder ◽  
E. C. Booth ◽  
B. L. Roberts ◽  
J. Comuzzi ◽  
H. Crannell
Keyword(s):  
Neutral Pion ◽  
Pion Photoproduction ◽  
Near Threshold ◽  
Complex Nuclei

Neutral pion photoproduction on carbon near threshold

1987 ◽  
Vol 185 (1-2) ◽  
pp. 25-28 ◽  
Author(s):  
E. Mazzucato ◽  
P. Argan ◽  
G. Audit ◽  
A. Bloch ◽  
N. De Botton ◽  
...  
Keyword(s):  
Neutral Pion ◽  
Pion Photoproduction ◽  
Near Threshold

NEUTRAL PION PHOTOPRODUCTION ON THE PROTON AND THE CLOUDY-BAG MODEL

1992 ◽  
Vol 07 (21) ◽  
pp. 5231-5244
Author(s):  
A.N. TABACHENKO
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Electric Dipole ◽  
Neutral Pion ◽  
Chiral Symmetry Breaking ◽  
Pion Photoproduction ◽  
Additional Contribution ◽  
Bag Model ◽  
Neutral Pions ◽  
Quark Masses

In the cloudy-bag model, the value of the electric dipole amplitude of the photoproduction of neutral pions off protons at threshold connected with the additional contribution from the chiral symmetry breaking interaction is evaluated. If this additional contribution is included in the amplitude of the photoproduction of neutral pions off protons at threshold, the discrepancy between the LET predictions and the measured value of the electric dipole amplitude [Formula: see text] can be resolved for the values of quark masses and bag radii which are close to the generally used values.

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