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Light fermions in quantum gravity
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| Veröffentlicht in: | New journal of physics 13(2011,12) Artikel-Nummer 125012, 27 Seiten |
|---|---|
| Personen und Körperschaften: | , |
| Titel: | Light fermions in quantum gravity/ Astrid Eichhorn and Holger Gies |
| Format: | E-Book-Kapitel |
| Sprache: | Englisch |
| veröffentlicht: |
16 December 2011
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| Gesamtaufnahme: |
: New journal of physics, 13(2011,12) Artikel-Nummer 125012, 27 Seiten
, volume:13 |
| Quelle: | Verbunddaten SWB Lizenzfreie Online-Ressourcen |
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| 520 | |a We study the impact of quantum gravity, formulated as a quantum field theory of the metric, on chiral symmetry in a fermionic matter sector. Specifically we address the question of whether metric fluctuations can induce chiral symmetry breaking and bound state formation. Our results based on the functional renormalization group indicate that chiral symmetry is left intact even at strong gravitational coupling. In particular, we found that asymptotically safe quantum gravity where the gravitational couplings approach a non-Gaußian fixed point generically admits universes with light fermions. Our results thus further support quantum gravity theories built on fluctuations of the metric field such as the asymptotic-safety scenario. A study of chiral symmetry breaking through gravitational quantum effects may also serve as a significant benchmark test for other quantum gravity scenarios, since a completely broken chiral symmetry at the Planck scale would not be in accordance with the observation of light fermions in our universe. We demonstrate that this elementary observation already imposes constraints on a generic UV completion of gravity. | ||
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| contents | We study the impact of quantum gravity, formulated as a quantum field theory of the metric, on chiral symmetry in a fermionic matter sector. Specifically we address the question of whether metric fluctuations can induce chiral symmetry breaking and bound state formation. Our results based on the functional renormalization group indicate that chiral symmetry is left intact even at strong gravitational coupling. In particular, we found that asymptotically safe quantum gravity where the gravitational couplings approach a non-Gaußian fixed point generically admits universes with light fermions. Our results thus further support quantum gravity theories built on fluctuations of the metric field such as the asymptotic-safety scenario. A study of chiral symmetry breaking through gravitational quantum effects may also serve as a significant benchmark test for other quantum gravity scenarios, since a completely broken chiral symmetry at the Planck scale would not be in accordance with the observation of light fermions in our universe. We demonstrate that this elementary observation already imposes constraints on a generic UV completion of gravity. |
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| spelling | Eichhorn, Astrid 1983- VerfasserIn (DE-588)1137344369 (DE-627)894438050 (DE-576)432759603 aut, Light fermions in quantum gravity Astrid Eichhorn and Holger Gies, 16 December 2011, 27, Text txt rdacontent, Computermedien c rdamedia, Online-Ressource cr rdacarrier, Gesehen am 25.02.2020, We study the impact of quantum gravity, formulated as a quantum field theory of the metric, on chiral symmetry in a fermionic matter sector. Specifically we address the question of whether metric fluctuations can induce chiral symmetry breaking and bound state formation. Our results based on the functional renormalization group indicate that chiral symmetry is left intact even at strong gravitational coupling. In particular, we found that asymptotically safe quantum gravity where the gravitational couplings approach a non-Gaußian fixed point generically admits universes with light fermions. Our results thus further support quantum gravity theories built on fluctuations of the metric field such as the asymptotic-safety scenario. A study of chiral symmetry breaking through gravitational quantum effects may also serve as a significant benchmark test for other quantum gravity scenarios, since a completely broken chiral symmetry at the Planck scale would not be in accordance with the observation of light fermions in our universe. We demonstrate that this elementary observation already imposes constraints on a generic UV completion of gravity., Gies, Holger 1972- VerfasserIn (DE-588)121558584 (DE-627)081386737 (DE-576)292771908 aut, Enthalten in New journal of physics [Bad Honnef] : Dt. Physikalische Ges., 1999 13(2011,12) Artikel-Nummer 125012, 27 Seiten Online-Ressource (DE-627)265510562 (DE-600)1464444-7 (DE-576)078991846 1367-2630 nnns, volume:13 year:2011 number:12 extent:27, http://dx.doi.org/10.1088/1367-2630/13/12/125012 Verlag Resolving-System kostenfrei Volltext, http://stacks.iop.org/1367-2630/13/i=12/a=125012 Verlag kostenfrei Volltext, http://dx.doi.org/10.1088/1367-2630/13/12/125012 LFER, LFER 2018-03-07T00:00:00Z |
| spellingShingle | Eichhorn, Astrid, Gies, Holger, Light fermions in quantum gravity, We study the impact of quantum gravity, formulated as a quantum field theory of the metric, on chiral symmetry in a fermionic matter sector. Specifically we address the question of whether metric fluctuations can induce chiral symmetry breaking and bound state formation. Our results based on the functional renormalization group indicate that chiral symmetry is left intact even at strong gravitational coupling. In particular, we found that asymptotically safe quantum gravity where the gravitational couplings approach a non-Gaußian fixed point generically admits universes with light fermions. Our results thus further support quantum gravity theories built on fluctuations of the metric field such as the asymptotic-safety scenario. A study of chiral symmetry breaking through gravitational quantum effects may also serve as a significant benchmark test for other quantum gravity scenarios, since a completely broken chiral symmetry at the Planck scale would not be in accordance with the observation of light fermions in our universe. We demonstrate that this elementary observation already imposes constraints on a generic UV completion of gravity. |
| swb_id_str | 499733959 |
| title | Light fermions in quantum gravity |
| title_auth | Light fermions in quantum gravity |
| title_full | Light fermions in quantum gravity Astrid Eichhorn and Holger Gies |
| title_fullStr | Light fermions in quantum gravity Astrid Eichhorn and Holger Gies |
| title_full_unstemmed | Light fermions in quantum gravity Astrid Eichhorn and Holger Gies |
| title_in_hierarchy | Light fermions in quantum gravity / Astrid Eichhorn and Holger Gies, |
| title_short | Light fermions in quantum gravity |
| title_sort | light fermions in quantum gravity |
| url | http://dx.doi.org/10.1088/1367-2630/13/12/125012, http://stacks.iop.org/1367-2630/13/i=12/a=125012 |