Cargando…

Black Hole Quantum Mechanics in the Presence of Species

Recently within the context of a microscopic quantum theory, the Black Hole's Quantum N-Portrait, it was shown that continuous global symmetries are compatible with quantum black hole physics. In the present paper we revise within the same framework the semi-classical black hole bound on the nu...

Descripción completa

Detalles Bibliográficos
Autores principales: Dvali, Gia, Gomez, Cesar, Lust, Dieter
Lenguaje:eng
Publicado: 2012
Materias:
Acceso en línea:https://dx.doi.org/10.1002/prop.201300002
http://cds.cern.ch/record/1455826
_version_ 1780925059329687552
author Dvali, Gia
Gomez, Cesar
Lust, Dieter
author_facet Dvali, Gia
Gomez, Cesar
Lust, Dieter
author_sort Dvali, Gia
collection CERN
description Recently within the context of a microscopic quantum theory, the Black Hole's Quantum N-Portrait, it was shown that continuous global symmetries are compatible with quantum black hole physics. In the present paper we revise within the same framework the semi-classical black hole bound on the number of particle species N_{species}. We show that unlike the bound on global charge, the bound on species survives in the quantum picture and gives rise to a new fundamental length-scale, L_{species} = sqrt{N_{species}} L_P$, beyond which the resolution of species identities is impossible. This finding nullifies the so-called species problem. This scale sets the size of the lightest quantum black hole in the theory, Planckion. A crucial difference between the gravitational and non-gravitational species emerges. For gravitational species, the lightest black holes are exactly at the scale of perturbative unitarity violation, which is a strong indication for self-UV-completion of gravity. However, non-gravitational species create a gap between the perturbative unitarity scale and the lightest black holes, which must be filled by some unitarity-restoring physics. Thus, self-UV-completion of gravity implies that the number of non-gravitational species must not exceed the gravitational ones.
id cern-1455826
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2012
record_format invenio
spelling cern-14558262021-05-03T20:25:50Zdoi:10.1002/prop.201300002http://cds.cern.ch/record/1455826engDvali, GiaGomez, CesarLust, DieterBlack Hole Quantum Mechanics in the Presence of SpeciesParticle Physics - TheoryRecently within the context of a microscopic quantum theory, the Black Hole's Quantum N-Portrait, it was shown that continuous global symmetries are compatible with quantum black hole physics. In the present paper we revise within the same framework the semi-classical black hole bound on the number of particle species N_{species}. We show that unlike the bound on global charge, the bound on species survives in the quantum picture and gives rise to a new fundamental length-scale, L_{species} = sqrt{N_{species}} L_P$, beyond which the resolution of species identities is impossible. This finding nullifies the so-called species problem. This scale sets the size of the lightest quantum black hole in the theory, Planckion. A crucial difference between the gravitational and non-gravitational species emerges. For gravitational species, the lightest black holes are exactly at the scale of perturbative unitarity violation, which is a strong indication for self-UV-completion of gravity. However, non-gravitational species create a gap between the perturbative unitarity scale and the lightest black holes, which must be filled by some unitarity-restoring physics. Thus, self-UV-completion of gravity implies that the number of non-gravitational species must not exceed the gravitational ones.arXiv:1206.2365MPP-2012-102LMU-ASC 38-12oai:cds.cern.ch:14558262012-06-13
spellingShingle Particle Physics - Theory
Dvali, Gia
Gomez, Cesar
Lust, Dieter
Black Hole Quantum Mechanics in the Presence of Species
title Black Hole Quantum Mechanics in the Presence of Species
title_full Black Hole Quantum Mechanics in the Presence of Species
title_fullStr Black Hole Quantum Mechanics in the Presence of Species
title_full_unstemmed Black Hole Quantum Mechanics in the Presence of Species
title_short Black Hole Quantum Mechanics in the Presence of Species
title_sort black hole quantum mechanics in the presence of species
topic Particle Physics - Theory
url https://dx.doi.org/10.1002/prop.201300002
http://cds.cern.ch/record/1455826
work_keys_str_mv AT dvaligia blackholequantummechanicsinthepresenceofspecies
AT gomezcesar blackholequantummechanicsinthepresenceofspecies
AT lustdieter blackholequantummechanicsinthepresenceofspecies