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Large-N bounds on, and compositeness limit of, gauge and gravitational interactions

In a toy model of gauge and gravitational interactions in $D \ge 4$ dimensions, endowed with an invariant UV cut-off $\Lambda$, and containing a large number $N$ of non-self-interacting matter species, the physical gauge and gravitational couplings at the cut-off, $\alpha_g \equiv g^2 \Lambda^{D-4}$...

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Autor principal: Veneziano, Gabriele
Lenguaje:eng
Publicado: 2001
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2002/06/051
http://cds.cern.ch/record/522940
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author Veneziano, Gabriele
author_facet Veneziano, Gabriele
author_sort Veneziano, Gabriele
collection CERN
description In a toy model of gauge and gravitational interactions in $D \ge 4$ dimensions, endowed with an invariant UV cut-off $\Lambda$, and containing a large number $N$ of non-self-interacting matter species, the physical gauge and gravitational couplings at the cut-off, $\alpha_g \equiv g^2 \Lambda^{D-4}$ and $\alpha_G \equiv G_N \Lambda^{D-2}$, are shown to be bounded by appropriate powers of ${1\over N}$. This implies that the infinite-bare-coupling (so-called compositeness) limit of these theories is smooth, and can even resemble our world. We argue that such a result, when extended to more realistic situations, can help avoid large-N violations of entropy bounds, solve the dilaton stabilization and GUT-scale problems in superstring theory, and provide a new possible candidate for quintessence.
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institution Organización Europea para la Investigación Nuclear
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publishDate 2001
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spelling cern-5229402019-09-30T06:29:59Zdoi:10.1088/1126-6708/2002/06/051http://cds.cern.ch/record/522940engVeneziano, GabrieleLarge-N bounds on, and compositeness limit of, gauge and gravitational interactionsParticle Physics - TheoryIn a toy model of gauge and gravitational interactions in $D \ge 4$ dimensions, endowed with an invariant UV cut-off $\Lambda$, and containing a large number $N$ of non-self-interacting matter species, the physical gauge and gravitational couplings at the cut-off, $\alpha_g \equiv g^2 \Lambda^{D-4}$ and $\alpha_G \equiv G_N \Lambda^{D-2}$, are shown to be bounded by appropriate powers of ${1\over N}$. This implies that the infinite-bare-coupling (so-called compositeness) limit of these theories is smooth, and can even resemble our world. We argue that such a result, when extended to more realistic situations, can help avoid large-N violations of entropy bounds, solve the dilaton stabilization and GUT-scale problems in superstring theory, and provide a new possible candidate for quintessence.hep-th/0110129CERN-TH-2001-278oai:cds.cern.ch:5229402001-10-15
spellingShingle Particle Physics - Theory
Veneziano, Gabriele
Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
title Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
title_full Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
title_fullStr Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
title_full_unstemmed Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
title_short Large-N bounds on, and compositeness limit of, gauge and gravitational interactions
title_sort large-n bounds on, and compositeness limit of, gauge and gravitational interactions
topic Particle Physics - Theory
url https://dx.doi.org/10.1088/1126-6708/2002/06/051
http://cds.cern.ch/record/522940
work_keys_str_mv AT venezianogabriele largenboundsonandcompositenesslimitofgaugeandgravitationalinteractions