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Göteborgs universitets publikationer

Chiral fermions in asymptotically safe quantum gravity

Författare och institution:
Jan Meibohm (Institutionen för fysik (GU)); Jan Martin Pawlowski (-)
Publicerad i:
European Physical Journal C, May 2016 ( 76:285 )
ISSN:
1434-6044
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2016
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
We study the consistency of dynamical fermionic matter with the asymptotic safety scenario of quantum gravity using the functional renormalisation group. Since this scenario suggests strongly coupled quantum gravity in the UV, one expects gravity-induced fermion self-interactions at energies of the Planck scale. These could lead to chiral symmetry breaking at very high energies and thus to large fermion masses in the IR. The present analysis which is based on the previous works (Christiansen et al., Phys Rev D 92:121501, 2015; Meibohm et al., Phys Rev D 93:084035, 2016), concludes that gravity-induced chiral symmetry breaking at the Planck scale is avoided for a general class of NJL-type models. We find strong evidence that this feature is independent of the number of fermion fields. This finding suggests that the phase diagram for these models is topologically stable under the influence of gravitational interactions.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Fysik ->
Subatomär fysik ->
Elementarpartikelfysik
NATURVETENSKAP ->
Fysik ->
Annan fysik ->
Relativitetsteori, gravitation
Nyckelord:
Quantum Field Theory, Quantum Gravity, Asymptotic Safety, Fermions
Postens nummer:
241225
Posten skapad:
2016-09-02 16:44

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