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Light holographic dilatons near critical points

Antón F. Faedo Orcid Logo, Carlos Hoyos, Maurizio Piai Orcid Logo, Ronnie Rodgers Orcid Logo, Javier G. Subils Orcid Logo

Physical Review D, Volume: 110, Issue: 12, Start page: 126017

Swansea University Author: Maurizio Piai Orcid Logo

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Abstract

We investigate the relation between the emergence of a dilaton in gapped (confining) field theories, and the presence of either complex fixed points or instabilities in the strongly cou- pled dynamics in two classes of bottom-up holographic models. We demonstrate that in one of the two classes there...

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Published in: Physical Review D
ISSN: 2470-0010 2470-0029
Published: American Physical Society (APS) 2024
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa68336
Abstract: We investigate the relation between the emergence of a dilaton in gapped (confining) field theories, and the presence of either complex fixed points or instabilities in the strongly cou- pled dynamics in two classes of bottom-up holographic models. We demonstrate that in one of the two classes there is a critical line of first-order phase transitions (at zero temperature) that terminates at a critical point. We calculate the mass spectrum of fluctuations of the associated regular gravity backgrounds, which we interpret as bound states in the dual field theories. In proximity to the second-order phase transition, we find a parametrically light scalar state, and its composition leads us to identify it as a dilaton.
College: Faculty of Science and Engineering
Funders: A. F. and C. H. are partially supported by Agencia Estatal de Investigación (AEI) and the Ministerio de Ciencia, Innovación y Universidades (MCIU) through the Spanish grant PID2021-123021NB-I00 and by Fundación para el Fomento en Asturias de la Investigación Científica Aplicada y la Tecnología (FICYT) through the Asturian grant SV-PA-21-AYUD/2021/52177. The work of M. P. has been supported in part by the Science and Technologies Facilities Council (STFC) Consolidated Grants No. ST/P00055X/1, No. ST/T000813/1, and ST/X000648. M. P. received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 813942. The work of R. R. was supported by the European Union’s Horizon Europe research and innovation program under Marie Sklodowska-Curie Grant Agreement No. 101104286. Nordita is supported in part by Nordforsk. Funded by SCOAP3.
Issue: 12
Start Page: 126017