scholarly journals Radiative corrections in the Yukawa model within the null-plane causal perturbation theory framework

2021 ◽  
Vol 103 (7) ◽  
Author(s):  
O. A. Acevedo ◽  
B. M. Pimentel
Keyword(s):  
Perturbation Theory ◽  
Radiative Corrections ◽  
Yukawa Model ◽  
Null Plane ◽  
Theory Framework

scholarly journals QED RADIATIVE CORRECTIONS TO THE DECAY π0→e+e−

1993 ◽  
Vol 08 (18) ◽  
pp. 1691-1700 ◽  
Author(s):  
GEORGE TRIANTAPHYLLOU
Keyword(s):  
Perturbation Theory ◽  
Decay Rate ◽  
Invariant Mass ◽  
New Physics ◽  
Radiative Corrections ◽  
First Order ◽  
Recent Interest ◽  
Electron Positron ◽  
Electron Positron Pair ◽  
First Order Perturbation

In view of the recent interest in the decays of mesons into a pair of light leptons, a computation of the QED radiative corrections to the decay of π0 into an electron-positron pair is presented here. The analysis is based on the soft-photon resummation method, which, unlike first-order perturbation theory, allows for very strict invariant-mass cuts on the final electrons. When combined with the theoretical estimates for the non-radiatively corrected decay rate, the results of the present paper could help to determine if new physics affect this decay.

scholarly journals Modified perturbation theory for the Yukawa model

2010 ◽  
Vol 53 (2) ◽  
pp. 163-171
Author(s):  
Yu. M. Poluéktov
Keyword(s):  
Perturbation Theory ◽  
Yukawa Model

A perturbation calculation of properties of the helium iso-electronic sequence

1958 ◽  
Vol 247 (1249) ◽  
pp. 245-259 ◽  
Keyword(s):  
Wave Function ◽  
Perturbation Theory ◽  
Power Series ◽  
Perturbation Methods ◽  
Ground States ◽  
Radiative Corrections ◽  
Perturbation Calculation ◽  
Magnetic Susceptibilities ◽  
Dipole Polarizabilities

Perturbation methods are employed to calculate the magnetic susceptibilities and the dipole polarizabilities of the ground states of the members of the helium iso-electronic sequences and also the mass polarization, relativistic and radiative corrections to their energies, the results being obtained as power series in the inverse of the nuclear charges. The calculations are prefaced by a brief résumé of the equations of perturbation theory applicable to the case when the unperturbed wave function is known only approximately.

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