Some Comments on Testing Quantum Electrodynamics in Elastic Particle–Antiparticle Scattering

1972 ◽  
Vol 50 (24) ◽  
pp. 3111-3116
Author(s):  
L. Resnick
Keyword(s):  
Elastic Scattering ◽  
Quantum Electrodynamics ◽  
Physical Region ◽  
High Energy ◽  
Photon Propagator ◽  
Negative Norm ◽  
Dynamical Zero ◽  
Elastic Particle

The photon propagator is assumed modified by the addition of a heavy photon of mass M and negative norm, in a conventional way of describing the possible breakdown of quantum electrodynamics. It is noted that because of interference between direct and annihilation diagrams, a dynamical zero can occur in the physical region of high energy elastic particle–antiparticle scattering, to lowest order in α. The position of this zero is a function of M. Several reactions are examined with a view to setting limits on M. The elastic scattering of transversely polarized e−e+ can be a sensitive probe for a finite M.

scholarly journals The Elastic Scattering of High Energy Neutron by Deuteron

1959 ◽  
Vol 21 (6) ◽  
pp. 879-901 ◽  
Author(s):  
Yoshiyuki Sakamoto ◽  
Tatuya Sasakawa
Keyword(s):  
Elastic Scattering ◽  
High Energy ◽  
High Energy Neutron ◽  
Energy Neutron

scholarly journals Real Amplitude in High Energy Elastic Scattering

1966 ◽  
Vol 36 (1) ◽  
pp. 190-191
Author(s):  
Mitsuru Hama ◽  
Yoshio Sumi
Keyword(s):  
Elastic Scattering ◽  
High Energy

Use of a Multiscintillator Target for Elastic Scattering at High Energy

1983 ◽  
pp. 155-162
Author(s):  
H. Azaiez ◽  
R. Birsa ◽  
F. Bradamante ◽  
S. Dalla Torre ◽  
M. Di Drusco ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
High Energy

scholarly journals Elastic scattering and breakup reactions with light proton- and neutron-rich exotic nuclei

2018 ◽  
Vol 194 ◽  
pp. 07002
Author(s):  
M.K. Gaidarov ◽  
V.K. Lukyanov ◽  
D.N. Kadrev ◽  
E.V. Zemlyanaya ◽  
A.N. Antonov ◽  
...  
Keyword(s):  
Experimental Data ◽  
Elastic Scattering ◽  
Cross Sections ◽  
Cluster Model ◽  
Microscopic Analysis ◽  
High Energy ◽  
The Real ◽  
Optical Potentials ◽  
Generator Coordinate ◽  
Energy Approximation

A microscopic analysis of the optical potentials (OPs) and cross sections of elastic scattering of 8B on 12C, 58Ni, and 208Pb targets at energies 20 < E < 170 MeV and 12,14Be on 12C at 56 MeV/nucleon is carried out. The real part of the OP is calculated by a folding procedure and the imaginary part is obtained on the base of the high-energy approximation (HEA). The density distributions of 8B evaluated within the variational Monte Carlo (VMC) model and the three-cluster model (3CM) are used to construct the potentials. The 14Be densities obtained in the framework of the the generator coordinate method (GCM) are used to calculate the optical potentials, while for the same purpose both the VMC model and GCM densities of 12Be are used. In the hybrid model developed and explored in our previous works, the only free parameters are the depths of the real and imaginary parts of OP obtained by fitting the experimental data. The use of HEA to estimate the imaginary OP at energies just above the Coulomb barrier is discussed. In addition, cluster model, in which 8B consists of a p-halo and the 7Be core, is applied to calculate the breakup cross sections of 8B nucleus on 9Be, 12C, and 197Au targets, as well as momentum distributions of 7Be fragments. A good agreement of the theoretical results with the available experimental data is obtained. It is concluded that the reaction studies performed in this work may provide supplemental information on the internal spatial structure of the proton- and neutron-halo nuclei.

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