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Opacity and effective field theory in anti-de Sitter backgrounds

Fichet, Sylvain (2019) Opacity and effective field theory in anti-de Sitter backgrounds. Physical Review D, 100 (9). Art. No. 095002. ISSN 2470-0010. doi:10.1103/physrevd.100.095002.

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We consider quantum field theory in a five-dimensional anti-de Sitter background, possibly truncated by four-dimensional (4D) branes. In the Euclidian version of this space, it is known that propagators exponentially decay when they go far enough toward the Poincaré horizon, i.e. deep enough into the IR region of the AdS bulk. In this note, we show that an analogous property exists in Lorentzian AdS. The exponential suppression is found to occur in the presence of bulk interactions dressing the AdS propagators. We calculate one-loop gravitational dressing and find that the suppression effect comes from the scalar component of the 5D graviton. We then argue that, at least at strong coupling, this exponential decay censors the region of spacetime where the 5D effective field theory would become invalid. As an application we estimate the rate for the cascade decay of bulk fields—which are known to produce soft spherical events with high multiplicity—and find this rate to be exponentially suppressed.

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Additional Information:© 2019 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3. Received 5 September 2019; published 4 November 2019. I am grateful to Flip Tanedo, Csaba Csáki, David Poland, Eric Perlmutter, Mark Wise, Prashant Saraswat, Gero von Gersdorff, Eduardo Pontón, and Philippe Brax for useful discussions and comments. I thank UCR where part of this work was realized. This work is supported by the São Paulo Research Foundation (FAPESP) under Grants No. 2011/11973, No. 2014/21477-2, and No. 2018/11721-4.
Group:Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)2011/11973
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)2014/21477-2
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)2018/11721-4
Issue or Number:9
Record Number:CaltechAUTHORS:20191104-075108952
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99636
Deposited By: Tony Diaz
Deposited On:04 Nov 2019 17:22
Last Modified:16 Nov 2021 17:48

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