$\kappa$-Poincaré invariant orientable field theories at 1-loop

Abstract

We consider a family of $\kappa$-Poincaré invariant scalar field theories on 4-d $\kappa$-Minkowski space with quartic orientable interaction, that is for which $\varphi$ and its conjugate ${\varphi }^{†}$ alternate in the quartic interaction, and whose kinetic operator is the square of a $U_{\kappa }(iso(4))$-equivariant Dirac operator. The formal commutative limit yields the standard complex ${\varphi }^4$ theory. We find that the 2-point function receives UV linearly diverging 1-loop corrections while it stays free of IR singularities that would signal occurrence of UV/IR mixing. We find that all the 1-loop planar and non-planar contributions to the 4-point function are UV finite, stemming from the existence of the particular estimate for the propagator partly combined with its decay properties at large momenta, implying formally vanishing of the beta-functions at 1-loop so that the coupling constants stay scale-invariant at 1-loop.

arXiv comment18 pages. Misprints corrected, title shortened. Version to appear in JHEP

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