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Renormalization in a Lorentz-violating model and higher-order operators

Nascimento, J. R. ; Petrov, A. Yu ; Reyes, Carlos M.

The European physical journal. C, Particles and fields, 2018-07, Vol.78 (7), p.1-22, Article 541 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Renormalization in a Lorentz-violating model and higher-order operators
Autor: Nascimento, J. R. ; Petrov, A. Yu ; Reyes, Carlos M.
Assuntos: Astronomy ; Astrophysics and Cosmology ; Dimensional changes ; Elementary Particles ; Hadrons ; Heavy Ions ; Measurement Science and Instrumentation ; Nuclear Energy ; Nuclear Physics ; Operators (mathematics) ; Physics ; Physics and Astronomy ; Quantum Field Theories ; Quantum Field Theory ; Regular Article - Theoretical Physics ; String Theory
É parte de: The European physical journal. C, Particles and fields, 2018-07, Vol.78 (7), p.1-22, Article 541
Descrição: The renormalization in a Lorentz-breaking scalar-spinor higher-derivative model involving ϕ 4 self-interaction and the Yukawa-like coupling is studied. We explicitly de-monstrate that the convergence is improved in comparison with the usual scalar-spinor model, so, the theory is super-renormalizable, with no divergences beyond four loops. We compute the one-loop corrections to the propagators for the scalar and fermionic fields and show that in the presence of higher-order Lorentz invariance violation, the poles that dominate the physical theory, are driven away from the standard on-shell pole mass due to radiatively induced lower dimensional operators. The new operators change the standard gamma-matrix structure of the two-point functions, introduce large Lorentz-breaking corrections and lead to modifications in the renormalization conditions of the theory. We found the physical pole mass in each sector of our model.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Renormalization in a Lorentz-violating model and higher-order operators

Nascimento, J. R. ; Petrov, A. Yu ; Reyes, Carlos M.

Berlin/Heidelberg: Springer Berlin Heidelberg

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