Author(s): Chaffey, Ian ; Fichet, Sylvain [UNESP] ; Tanedo, Philip
Date: 2021
Persistent ID: http://hdl.handle.net/11449/207820
Origin: Oasisbr
Subject(s): Phenomenology of Field Theories in Higher Dimensions; Strings and branes phenomenology; Phenomenology of Field Theories in Higher Dimensions; Phenomenology of Field Theories in Higher Dimensions; Strings and branes phenomenology; Strings and branes phenomenology
Made available in DSpace on 2021-06-25T11:01:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-06-01
Dark matter may self-interact through a continuum of low-mass states. This happens if dark matter couples to a strongly-coupled nearly-conformal hidden sector. This type of theory is holographically described by brane-localized dark matter interacting with bulk fields in a slice of 5D anti-de Sitter space. The long-range potential in this scenario depends on a non-integer power of the spatial separation, in contrast to the Yukawa potential generated by the exchange of a single 4D mediator. The resulting self-interaction cross section scales like a non-integer power of velocity. We identify the Born, classical and resonant regimes and investigate them using state-of-the-art numerical methods. We demonstrate the viability of our continuum-mediated framework to address the astrophysical small-scale structure anomalies. Investigating the continuum-mediated Sommerfeld enhancement, we demonstrate that a pattern of resonances can occur depending on the non-integer power. We conclude that continuum mediators introduce novel power-law scalings which open new possibilities for dark matter self-interaction phenomenology.
Department of Physics & Astronomy University of California, 900 University Avenue
ICTP SAIFR & IFT-UNESP, R. Dr. Bento Teobaldo Ferraz
ICTP SAIFR & IFT-UNESP, R. Dr. Bento Teobaldo Ferraz
