12 papers
Scalar fields, impurities and supersymmetry
D. Bazeia, A. C. Lehum, G. S. Santiago
We develop a rigid superspace formulation for multifield scalar models coupled to localized impurities through spurion superfields in two-dimensional spacetime.…
Lorentz violating quadratic gravity
R. B. Alfaia, Willian Carvalho, A. C. Lehum +3
In this paper, we explore the perturbative renormalization and study the classical dynamics of the bumblebee model coupled to quadratic gravity, a theoretical setting that allows t…
Perturbative Analysis of CPT-Odd Lorentz-Violating Scalar QCD
J. C. C. Felipe, L. C. T. Brito, A. C. Lehum +2
We perform a complete one-loop renormalization analysis of CPT-odd Lorentz-violating scalar quantum chromodynamics with adjoint scalar matter. Working to first order in the preferr…
Complex bumblebee model
Willian Carvalho, A. C. Lehum, J. R. Nascimento +1
We formulate a renormalizable complex extension of the bumblebee theory in which the bumblebee field is promoted to a complex one and coupled to an Abelian gauge sector. Besides th…
Half-BPS Impurity Backgrounds and Supersymmetry
D. Bazeia, A. C. Lehum
We develop a rigid superspace framework for spatially inhomogeneous impurity deformations in dimensions by embedding the impurity profile into a real b…
Scattering amplitudes in dimensionless quadratic gravity coupled to QED
I. F. Cunha, A. C. Lehum
We study ultra-Planckian scattering in an Abelian gauge theory coupled to agravity, the scale-free and renormalizable realization of quadratic quantum gravity. Focusing on…