The W and Z Bosons

2019 ◽  
pp. 265-282
Author(s):  
Michael E. Peskin
Keyword(s):  
Gauge Theory ◽  
Positron Annihilation ◽  
Weak Interaction ◽  
Z Boson ◽  
Z Bosons ◽  
Theory Model ◽  
Electron Positron Annihilation ◽  
Electron Positron

This chapter describes the predictions of the gauge theory model of the weak interaction for the production and decay of the W and Z bosons, and the comparison of these predictions to experiment. It describes precision tests of the gauge theory model using electron-positron annihilation to the Z boson.

scholarly journals Asymmetries in Processes of Electron–Positron Annihilation

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1132 ◽  
Author(s):  
Andrej Arbuzov ◽  
Serge Bondarenko ◽  
Lidia Kalinovskaya
Keyword(s):  
Positron Annihilation ◽  
Z Boson ◽  
Weak Coupling ◽  
Wide Energy Range ◽  
Mixing Angle ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Electroweak Radiative Corrections ◽  
Electroweak Mixing Angle ◽  
Wide Energy

Processes of electron–positron annihilation into a pair of fermions were considered. Forward–backward and left–right asymmetries were studied, taking into account polarization of initial and final particles. Complete 1-loop electroweak radiative corrections were included. A wide energy range including the Z boson peak and higher energies relevant for future e + e − colliders was covered. Sensitivity of observable asymmetries to the electroweak mixing angle and fermion weak coupling was discussed.

scholarly journals Locally finite two-loop amplitudes for off-shell multi-photon production in electron-positron annihilation

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Charalampos Anastasiou ◽  
Rayan Haindl ◽  
George Sterman ◽  
Zhou Yang ◽  
Mao Zeng
Keyword(s):  
Gauge Theory ◽  
Positron Annihilation ◽  
Simple Manner ◽  
Locally Finite ◽  
Four Dimensions ◽  
Self Energy ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Loop Amplitude ◽  
The One

Abstract We study the singularity structure of two-loop QED amplitudes for the production of multiple off-shell photons in massless electron-positron annihilation and develop counterterms that remove their infrared and ultraviolet divergences point by point in the loop integrand. The remainders of the subtraction are integrable in four dimensions and can be computed in the future with numerical integration. The counterterms capture the divergences of the amplitudes and factorize in terms of the Born amplitude and the finite remainder of the one-loop amplitude. They consist of simple one- and two-loop integrals with at most three external momenta and can be integrated analytically in a simple manner with established methods. We uncover novel aspects of fully local IR factorization, where vertex and self energy subdiagrams must be modified by new symmetrizations over loop momenta, in order to expose their tree-like tensor structures and hence factorization of IR singularities prior to loop integration. This work is a first step towards isolating locally the hard contributions of generic gauge theory amplitudes and rendering them integrable in exactly four dimensions with numerical methods.

scholarly journals Calculation of the Doppler broadening of the electron-positron annihilation radiation in defect-free bulk materials

2000 ◽  
Vol 61 (15) ◽  
pp. 10092-10099 ◽  
Author(s):  
V. J. Ghosh ◽  
M. Alatalo ◽  
P. Asoka-Kumar ◽  
B. Nielsen ◽  
K. G. Lynn ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Annihilation Radiation ◽  
Doppler Broadening ◽  
Bulk Materials ◽  
Electron Positron Annihilation ◽  
Electron Positron

Experimental study of jets in electron-positron annihilation

1981 ◽  
Vol 101 (1-2) ◽  
pp. 129-134 ◽  
Author(s):  
W. Bartel ◽  
D. Cords ◽  
P. Dittmann ◽  
R. Eichler ◽  
R. Felst ◽  
...  
Keyword(s):  
Experimental Study ◽  
Positron Annihilation ◽  
Electron Positron Annihilation ◽  
Electron Positron
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