On a family of (1+11+1)-dimensional scalar field theory models: Kinks, stability, one-loop mass shifts

In this paper we construct a one-parametric family of (1+11+1)-dimensional one-component scalar field theory models supporting kinks. Inspired by the sine-Gordon and ϕ4ϕ4 models, we look at all possible extensions such that the kink second-order fluctuation operators are Schrödinger differential operators with Pöschl–Teller potential wells. In this situation, the associated spectral problem is solvable and therefore we shall succeed in analyzing the kink stability completely and in computing the one-loop quantum correction to the kink mass exactly. When the parameter is a natural number, the family becomes the hierarchy for which the potential wells are reflectionless, the two first levels of the hierarchy being the sine-Gordon and ϕ4ϕ4 models.

► We construct a family of scalar field theory models supporting kinks.
► The second-order kink fluctuation operators involve Pöschl–Teller potential wells.
► We compute the one-loop quantum correction to the kink mass with different methods.