3 papers
hep-th2020
One-loop effective action: nonlocal form factors and renormalization group
Poliane de Morais Teixeira, Ilya L. Shapiro, Tiago G. Ribeiro
We review and present full detail of the Feynman diagram - based and heat-kernel method - based calculations of the simplest nonlocal form factors in the one-loop contributions of…
hep-th2019
Scalar model of effective field theory in curved space
Tiago G. Ribeiro, Ilya L. Shapiro
We consider, in more details than it was done previously, the effective low-energy behavior in the quantum theory of a light scalar field coupled to another scalar with much larger…
hep-th2018
Gravitational form factors and decoupling in 2D
Tiago G. Ribeiro, Ilya L. Shapiro, Omar Zanusso
We calculate and analyse non-local gravitational form factors induced by quantum matter fields in curved two-dimensional space. The calculations are performed for scalars, spinors…