The Ultraviolet and Infrared Behavior of an Abelian Proca Model From the Viewpoint of a One-Parameter Extension of the Covariant Heisenberg Algebra

Abstract

Recently a one-parameter extension of the covariant Heisenberg algebra with the extension parameter $l$ ($l$ is a non-negative constant parameter which has a dimension of $[momentum{]}^{-1}$) in a $(D+1)$-dimensional Minkowski space-time has been presented [G. P. de Brito, P. I. C. Caneda, Y. M. P. Gomes, J. T. Guaitolini Junior and V. Nikoofard, Effective models of quantum gravity induced by Planck scale modifications in the covariant quantum algebra, Adv. High Energy Phys. 2017 (2017) 4768341]. The Abelian Proca model is reformulated from the viewpoint of the above one-parameter extension of the covariant Heisenberg algebra. It is shown that the free space solutions of the above modified Proca model satisfy the modified dispersion relation $\frac{{\text{p}}^2}{{\left(1+\frac{{\Lambda }^2}{2{\hslash }^2}{\text{p}}^2\right)}^2}=m^2{c}^2$ where $\Lambda =\hslash l$ is the characteristic length scale in our model. This modified dispersion relation describes two massive vector particles with the effective masses ${\mathcal{M}}_{{}_{\pm }}(\Lambda )=\frac{2m}{1\mp \sqrt{1-2{\left(\frac{mc\Lambda }{\hslash }\right)}^2}}$. Numerical estimations show that the maximum value of $\Lambda$ in a four-dimensional space-time is near to the electroweak length scale, i.e., ${\Lambda }_{{}_{max}}\sim l_{{}_{electroweak}}\sim 10^{-18}m$. We show that in the infrared/large-distance domain the modified Proca model behaves like an Abelian massive Lee-Wick model which has been presented by Accioly and his co-workers [A. Accioly, J. Helayel-Neto, G. Correia, G. Brito, J. de Almeida and W. Herdy, Interparticle potential energy for D-dimensional electromagnetic models from the corresponding scalar ones, Phys. Rev. D 93 (2016) 105042].

12 pages, No figure