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Light dilaton near critical points in top-down holography
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Antón F. Faedo ,
Maurizio Piai ,
Ronnie Rodgers ,
Javier G. Subils
Physical Review D, Volume: 112, Issue: 12
Swansea University Author:
Maurizio Piai
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DOI (Published version): 10.1103/1wqc-vk7q
Abstract
We study a class of UV-complete, strongly coupled, confining three-dimensional field theories, that exhibit a novel stabilisation mechanism for the mass of the lightest scalar composite state, relying on the existence of a critical point. The theories admit a holographic dual description in terms of...
| Published in: | Physical Review D |
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| ISSN: | 2470-0010 2470-0029 |
| Published: |
American Physical Society (APS)
2025
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa71044 |
| Abstract: |
We study a class of UV-complete, strongly coupled, confining three-dimensional field theories, that exhibit a novel stabilisation mechanism for the mass of the lightest scalar composite state, relying on the existence of a critical point. The theories admit a holographic dual description in terms of regular backgrounds in eleven-dimensional supergravity. Their phase diagram includes a line of first-order phase transitions ending at the critical point, where the transition becomes of second order. We calculate the mass spectrum of bound states of the field theory, by considering fluctuations around thebackground solutions, and find that, near the critical point, a hierarchy of scales develops, such that one state becomes parametrically light. We identify this state as the dilaton, the pseudo-Nambu-Goldstone boson associated with the spontaneous breaking of approximate scale invariance. This stabilisationmechanism might be exploited to address hierarchy problems in particle and astroparticle physics. |
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| College: |
Faculty of Science and Engineering |
| Funders: |
A. F. is partially supported by the AEI and the MCIU through the Spanish Grant No. PID2021-123021NB-I00. The work of M. P. has been supported by the STFC Consolidated Grants No. ST/T000813/1 and No. ST/X000648/1. 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. |
| Issue: |
12 |