Bound states of massive complex ghosts in superrenormalizable quantum gravity theories

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidad de Zaragoza-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de Juiz de Fora-
Autor(es): dc.creatorAsorey, M.-
Autor(es): dc.creatorKrein, G.-
Autor(es): dc.creatorPardina, M.-
Autor(es): dc.creatorShapiro, I.-
Data de aceite: dc.date.accessioned2025-08-21T23:25:44Z-
Data de disponibilização: dc.date.available2025-08-21T23:25:44Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/JHEP01(2025)113-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/299525-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/299525-
Descrição: dc.descriptionOne of the remarkable differences between renormalizable quantum gravity with four-derivative action and its superrenormalizable polynomial generalizations is that the latter admit a more sophisticated particle mass spectrum. Already in the simplest superrenormalizable case, the theory has a six-derivative Lagrangian, admitting either a real or complex spectrum of masses. In the case of a real spectrum, there are the graviton, massive unphysical ghosts, and normal particles with masses exceeding the ones of the ghosts. It is also possible to have pairs of complex conjugate massive ghost-like particles. We show that in both cases, these theories do not admit a Källén-Lehmann representation and do not satisfy the positivity criterium of consistency in terms of the fields associated to those particles. In the main part of the work, using a relatively simple Euclidean scalar toy model, we show that the theory with complex spectrum forms bound states confining unphysical massive excitations into a normal composite particle. Finally, we discuss the cosmological implications of such a ghost confinement.-
Descrição: dc.descriptionCentro de Astropartículas y Física de Altas Energías Departamento de Física Teórica Universidad de Zaragoza-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 — Bloco II, SP-
Descrição: dc.descriptionDepartamento de Física ICE Universidade Federal de Juiz de Fora, Campus Universitário, MG-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271 — Bloco II, SP-
Idioma: dc.languageen-
Relação: dc.relationJournal of High Energy Physics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectModels of Quantum Gravity-
Palavras-chave: dc.subjectNonperturbative Effects-
Palavras-chave: dc.subjectRenormalization and Regularization-
Título: dc.titleBound states of massive complex ghosts in superrenormalizable quantum gravity theories-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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