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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Dark matter in Hidden Valley models with stable and unstable light dark mesons

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Beauchesne, Hugues [1, 2] ; Bertuzzo, Enrico [1] ; di Cortona, Giovanni Grilli [1]
Total Authors: 3
[1] Univ Sao Paulo, Inst Fis, CP 66-318, BR-05315970 Sao Paulo - Brazil
[2] Ben Gurion Univ Negev, Dept Phys, IL-8410501 Beer Sheva - Israel
Total Affiliations: 2
Document type: Journal article
Source: Journal of High Energy Physics; n. 4 APR 18 2019.
Web of Science Citations: 2

It is a distinct possibility that a Hidden Valley sector would have a spectrum of light particles consisting of both stable and unstable dark mesons. The simultaneous presence of these two types of particles can lead to novel mechanisms for generating the correct dark matter relic abundance, which in turn can reflect themselves into new exotic signatures at colliders. We study the viability of such sectors for various Hidden Valley models and map the valid parameter space to possible collider signatures. Mediators studied include various scalar bifundamentals and a heavy Z. It is shown that in general bounds from direct and indirect detection can easily be avoided. In most of the allowed parameter space, the relic density is determined by stable mesons annihilating to unstable ones which in turn decay quickly to Standard Model particles. Dark mesons that decay mainly to heavier Standard Model fermions allow for more valid parameter space, though dark mesons are still allowed to decay exclusively to some of the lighter fermions. Possible exotic collider signatures include displaced vertices, emerging jets and semivisible jets. (AU)

FAPESP's process: 16/17040-3 - Fenomelogia das Full-Hierarchy Quiver theories
Grantee:Hugues Beauchesne
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/25884-4 - Physics beyond the standard model: theoretical and phenomenological challenges
Grantee:Enrico Bertuzzo
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 16/17041-0 - Setor de Higgs das Full-hierarchy Quiver Theories
Grantee:Giovanni Grilli Di Cortona
Support type: Scholarships in Brazil - Post-Doctorate