# Iberian Strings 2020

15-17 January 2020
Santiago de Compostela
Europe/Zurich timezone

## Universal properties of Kaluza-Klein gravitons

15 Jan 2020, 17:00
15m
Santiago de Compostela

#### Santiago de Compostela

Hospederia de San Martiño Pinario Plaza de la Inmaculada, 3 15704 Santiago de Compostela

### Speaker

Vacua of different gaugings of $D = 4$ $\mathcal{N} = 8$ supergravity that preserve the same supersymmetries and bosonic symmetry tend to exhibit the same universal mass spectrum within their respective supergravities. For AdS${}_4$ vacua in gauged supergravities that arise upon consistent truncation of string/M-theory, we will show in this talk that this universality is lost at higher Kaluza-Klein levels, but still present in a milder form, as certain sums over a finite number of states remain universal. Further, we propose an SL(8)-covariant mass matrix for Kaluza-Klein gravitons which is valid for all the AdS${}_4$ vacua considered and resembles those for the supergravity fields at level zero. The universality of mass sums is related to the trace of this mass matrix.