Consistency of matter models with asymptotically safe quantum gravity

P. Donà, A. Eichhorn, R. Percacci

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Abstrakt

We discuss the compatibility of quantum gravity with dynamical matter degrees of freedom. Specifically, we present bounds we obtained in Donà et al. (Phys. Rev. D, 89, 084035 (2014) doi:10.1103/PhysRevD.89.084035) on the allowed number and type of matter fields within asymptotically safe quantum gravity. As a novel result, we show bounds on the allowed number of spin-3/2 (Rarita-Schwinger) fields (e.g., the gravitino). These bounds, obtained within truncated renormalization group flows, indicate the compatibility of asymptotic safety with the matter fields of the standard model. Further, they suggest that extensions of the matter content of the standard model are severely restricted in asymptotic safety. This means that searches for new particles at colliders could provide experimental tests for this particular approach to quantum gravity.

OriginalsprogEngelsk
TidsskriftCanadian Journal of Physics
Vol/bind93
Udgave nummer9
Sider (fra-til)988-994
DOI
StatusUdgivet - 2014
Udgivet eksterntJa

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