Navigation überspringen
Universitätsbibliothek Heidelberg
Status: Bibliographieeintrag

Verfügbarkeit
Standort: ---
Exemplare: ---
heiBIB
 Online-Ressource
Verfasst von:Könnig, Frank [VerfasserIn]   i
 Nersisyan, Henrik [VerfasserIn]   i
 Akrami, Yashar [VerfasserIn]   i
 Amendola, Luca [VerfasserIn]   i
 Zumalacarregui, Miguel [VerfasserIn]   i
Titel:A spectre is haunting the cosmos
Titelzusatz:quantum stability of massive gravity with ghosts
Verf.angabe:Frank Könnig, Henrik Nersisyan, Yashar Akrami, Luca Amendola and Miguel Zumalacárregui
Fussnoten:Gesehen am 10.11.2017
Titel Quelle:Enthalten in: Journal of high energy physics
Jahr Quelle:2016
Band/Heft Quelle:(2016,11) Artikel-Nummer 118, 26 Seiten
ISSN Quelle:1029-8479
Abstract:Many theories of modified gravity with higher order derivatives are usually ignored because of serious problems that appear due to an additional ghost degree of freedom. Most dangerously, it causes an immediate decay of the vacuum. However, breaking Lorentz invariance can cure such abominable behavior. By analyzing a model that describes a massive graviton together with a remaining Boulware-Deser ghost mode we show that even ghostly theories of modified gravity can yield models that are viable at both classical and quantum levels and, therefore, they should not generally be ruled out. Furthermore, we identify the most dangerous quantum scattering process that has the main impact on the decay time and find differences to simple theories that only describe an ordinary scalar field and a ghost. Additionally, constraints on the parameters of the theory including some upper bounds on the Lorentz-breaking cutoff scale are presented. In particular, for a simple theory of massive gravity we find that a breaking of Lorentz invariance is allowed to happen even at scales above the Planck mass. Finally, we discuss the relevance to other theories of modified gravity.
DOI:doi:10.1007/JHEP11(2016)118
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Kostenfrei: Verlag: http://dx.doi.org/10.1007/JHEP11(2016)118
 Kostenfrei: Verlag: https://link.springer.com/article/10.1007/JHEP11(2016)118
 DOI: https://doi.org/10.1007/JHEP11(2016)118
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1565221249
Verknüpfungen:→ Zeitschrift

Permanenter Link auf diesen Titel (bookmarkfähig):  https://katalog.ub.uni-heidelberg.de/titel/68188634   QR-Code
zum Seitenanfang