Elementary photopion production amplitude

1991 ◽  
pp. 13-57
Author(s):  
Anton Nagl ◽  
Varadarajan Devanathan ◽  
Herbert Überall
Keyword(s):  
Production Amplitude

scholarly journals Zeros of the Vector - Meson Production Amplitude and Their Implications

1973 ◽  
Vol 30 (10) ◽  
pp. 465-468 ◽  
Author(s):  
L. J. Gutay ◽  
R. L. McIlwain ◽  
K. V. Vasavada ◽  
F. T. Meiere
Keyword(s):  
Vector Meson ◽  
Meson Production ◽  
Production Amplitude ◽  
Vector Meson Production

Reggeon calculus for the production amplitude. II

1975 ◽  
Vol 11 (10) ◽  
pp. 2989-3007 ◽  
Author(s):  
Jochen Bartels
Keyword(s):  
Production Amplitude

scholarly journals Zeros of the vector meson production amplitude and their implications

1972 ◽  
Author(s):  
L.J. Gutay ◽  
R.L. McIlwain ◽  
K.V. Vasavada ◽  
F.T. Meiere
Keyword(s):  
Vector Meson ◽  
Meson Production ◽  
Production Amplitude ◽  
Vector Meson Production

Diffractive hadron production at ultrahigh energies

2015 ◽  
Vol 30 (11) ◽  
pp. 1550054 ◽  
Author(s):  
V. V. Anisovich ◽  
M. A. Matveev ◽  
V. A. Nikonov
Keyword(s):  
Energy Region ◽  
Hadron Production ◽  
Ultrahigh Energy ◽  
Production Amplitude ◽  
Initial State ◽  
Final State ◽  
Black Disk ◽  
Diffractive Production ◽  
Three Body ◽  
K Matrix

Diffractive production is considered in the ultrahigh energy region where pomeron exchange amplitudes are transformed into black disk ones due to rescattering corrections. The corresponding corrections in hadron reactions h1 + h3 → h1 + h2 + h3 with small momenta transferred [Formula: see text] are calculated in terms of the K-matrix technique modified for ultrahigh energies. Small values of the momenta transferred are crucial for introducing equations for amplitudes. The three-body equation for hadron diffractive production reaction h1 + h3 → h1 + h2 + h3 is written and solved precisely in the eikonal approach. In the black disk regime final state scattering processes do not change the shapes of amplitudes principally but dump amplitudes by a factor ~ ¼; initial state rescatterings result in additional factor ~ ½. In the resonant disk regime initial and final state scatterings damp strongly the production amplitude that corresponds to σ inel /σ tot → 0 at [Formula: see text] in this mode.

scholarly journals Zeros of the Vector-Meson Production Amplitude and Their Implications

1973 ◽  
Vol 30 (12) ◽  
pp. 578-578
Author(s):  
L. J. Gutay ◽  
R. L. McIlwain ◽  
K. V. Vasavada ◽  
F. T. Meiere
Keyword(s):  
Vector Meson ◽  
Meson Production ◽  
Production Amplitude ◽  
Vector Meson Production

scholarly journals Forward Structure of the Single-Pion-Production Amplitude

1970 ◽  
Vol 24 (7) ◽  
pp. 332-336 ◽  
Author(s):  
J. H. Scharenguivel ◽  
L. J. Gutay ◽  
D. H. Miller ◽  
R. L. McIlwain ◽  
F. T. Meiere ◽  
...  
Keyword(s):  
Pion Production ◽  
Production Amplitude

scholarly journals ADVANCES IN A FIELD-THEORETIC UNDERSTANDING OF PION PRODUCTION IN NUCLEON–NUCLEON COLLISIONS

2007 ◽  
Vol 22 (02n03) ◽  
pp. 591-595 ◽  
Author(s):  
VADIM LENSKY ◽  
JOHANN HAIDENBAUER ◽  
CHRISTOPH HANHART ◽  
VADIM BARU ◽  
ALEXANDER KUDRYAVTSEV ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Cross Section ◽  
Chiral Perturbation Theory ◽  
Pion Production ◽  
Nucleon Nucleon ◽  
Leading Order ◽  
Production Amplitude ◽  
Chiral Perturbation ◽  
Phenomenological Studies ◽  
The Cross

We study the production amplitude for the reaction NN → NNπ up to next-to-leading order in chiral perturbation theory. We show that the irreducible chiral loops at this order exactly cancel those terms that arise from the off-shell parts of the πN rescattering vertex. This cancellation is required for formal consistency of the whole scheme. The net effect of the inclusion of all next-to-leading order loops is to enhance the leading rescattering amplitude by a factor of 4/3 compared to phenomenological studies, bringing its contribution to the cross section for pp → dπ+ close to the experimental value.

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