Field theories on $\rho$-deformed Minkowski space-time

TL;DR

This paper investigates the one-loop quantum corrections of scalar field theories on a novel $ ho$-deformed Minkowski space, revealing UV divergences and IR singularities depending on interaction types, with implications for noncommutative geometry.

Contribution

It introduces a detailed analysis of scalar field theories on $ ho$-Minkowski space, including the star-product structure and one-loop quantum properties, highlighting differences from standard noncommutative models.

Findings

2-point functions exhibit UV quadratic divergences in 4D for orientable interactions.

No UV/IR mixing occurs in 2-point functions for orientable interactions.

IR singularities appear in 4-point functions and non-orientable interactions.

Abstract

We study one-loop perturbative properties of scalar field theories on the $\rho$-Minkowski space. The corresponding star-product, together with the involution are characterized from a combination of Weyl quantization and defining properties of the convolution algebra of the Euclidean group linked to the coordinate algebra of the $\rho$-Minkowski space. The natural integration measure linked to the Haar measure of the Euclidean group defines a trace for the star-product. One-loop properties of the 2-point and 4-point functions for families of complex-valued scalar field theories on $\rho$-Minkowski space are examined. For scalar theories with orientable interaction, the 2-point function is found to receive UV quadratically diverging one-loop corrections in 4 dimensions while no IR singularities generating UV/IR mixing appears. These however occur in the one-loop corrections to the 4-point function. As well, one-loop 2-point functions for theories with non-orientable interaction involve such IR singularities. These results are discussed.