Large mass hierarchies from strongly-coupled dynamics

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dc.citation.doi10.1007/JHEP06(2016)114en_ZA
dc.citation.issue6en_ZA
dc.contributor.authorAthenodorou, A.
dc.contributor.authorBennett, E.
dc.contributor.authorBergner, G.
dc.contributor.authorElander, D.
dc.contributor.authorLin, C.-J.D.
dc.contributor.authorLucini, B.
dc.contributor.authorPiai, M.
dc.date.accessioned2017-03-29T09:58:24Z
dc.date.available2017-03-29T09:58:24Z
dc.date.issued2016-06
dc.description.abstractBesides the Higgs particle discovered in 2012, with mass 125 GeV, recent LHC data show tentative signals for new resonances in diboson as well as diphoton searches at high center-of-mass energies (2 TeV and 750 GeV, respectively). If these signals are confirmed (or other new resonances are discovered at the TeV scale), the large hierarchies between masses of new bosons require a dynamical explanation. Motivated by these tentative signals of new physics, we investigate the theoretical possibility that large hierarchies in the masses of glueballs could arise dynamically in new strongly-coupled gauge theories extending the standard model of particle physics. We study lattice data on non-Abelian gauge theories in the (near-)conformal regime as well as a simple toy model in the context of gauge/gravity dualities. We focus our attention on the ratio R between the mass of the lightest spin-2 and spin-0 resonances, that for technical reasons is a particularly convenient and clean observable to study. For models in which (non-perturbative) 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.en_ZA
dc.description.librarianSP17en_ZA
dc.identifier.citationAthenodorou, A. et al. 2016. Large mass hierarchies from strongly-coupled dynamics. Journal of High Energy Physics (6), Article number 114.en_ZA
dc.identifier.issn1029-8479 (Online)
dc.identifier.issn1126-6708 (Print)
dc.identifier.urihttp://hdl.handle.net/10539/22255
dc.journal.titleJournal of High Energy Physicsen_ZA
dc.journal.volume2016en_ZA
dc.language.isoenen_ZA
dc.publisherSpringer Verlagen_ZA
dc.rights© 2016 Athenodorou et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0).en_ZA
dc.subjectGauge-gravity correspondenceen_ZA
dc.subjectLattice Quantum Field Theoryen_ZA
dc.subjectTechnicolor and Composite Modelsen_ZA
dc.titleLarge mass hierarchies from strongly-coupled dynamicsen_ZA
dc.typeArticleen_ZA
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