Large mass hierarchies from strongly-coupled dynamics

Athenodorou, Andreas; Bennett, Ed; Bergner, Georg; Elander, Daniel; Lin, C. -J. David; Lucini, Biagio; Piai, Maurizio (2016). Large mass hierarchies from strongly-coupled dynamics. PoS - proceedings of science, LATTICE2016(232). Scuola Internazionale Superiore di Studi Avanzati SISSA

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Motivated by the absence of signals of new physics at the LHC, which seems to imply the presence of large mass hierarchies, we investigate the theoretical possibility that these could arise dynamically in new strongly-coupled gauge theories extending the standard model of particle physics. To this purpose, we study lattice data on non-Abelian gauge theories in the (near-)conformal
regime—specifically, SU(2) with Nf = 1 and 2 dynamical fermion flavours in the adjoint representation. We focus our attention on the ratio R between the masses of the lightest spin-2 and spin-0 resonances, and draw comparisons with a simple toy model in the context of gauge/gravity dualities. For models in which large anomalous dimensions arise dynamically, we show indications that this mass ratio can be large, with R > 5. Moreover, our results suggest that R might be related to universal properties of the IR fixed point. Our findings provide an interesting step towards understanding large mass ratios in the non-perturbative regime of quantum field theories with (near) IR conformal behaviour.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Institute of Theoretical Physics

UniBE Contributor:

Bergner, Georg

Subjects:

500 Science > 530 Physics

ISSN:

1824-8039

Publisher:

Scuola Internazionale Superiore di Studi Avanzati SISSA

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

29 Jun 2017 15:00

Last Modified:

29 Jun 2017 15:00

BORIS DOI:

10.7892/boris.96109

URI:

https://boris.unibe.ch/id/eprint/96109

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