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Filtered Dark Matter at a First Order Phase Transition


Baker, Michael J; Kopp, Joachim; Long, Andrew J (2019). Filtered Dark Matter at a First Order Phase Transition. arXiv.org 1912.02830, University of Zurich.

Abstract

We describe a new mechanism of dark matter production in the early Universe, based on thedynamics of a first order phase transition. We assume that dark matter particles acquire massduring the phase transition, making it energetically unfavourable for them to enter the expandingbubbles of the massive phase. Instead, most of them are reflected off the advancing bubble wallsand quickly annihilate away in the massless phase. The bubbles eventually merge as the phasetransition is completed, and only the dark matter particles which have entered the bubbles surviveto constitute the observed dark matter today. This mechanism can produce dark matter with massesfrom the GeV scale to above the PeV scale, including a large region of viable parameter space beyondthe Griest–Kamionkowski bound. Current and future direct detection and collider experiments canprobe much of the viable parameter space.

Abstract

We describe a new mechanism of dark matter production in the early Universe, based on thedynamics of a first order phase transition. We assume that dark matter particles acquire massduring the phase transition, making it energetically unfavourable for them to enter the expandingbubbles of the massive phase. Instead, most of them are reflected off the advancing bubble wallsand quickly annihilate away in the massless phase. The bubbles eventually merge as the phasetransition is completed, and only the dark matter particles which have entered the bubbles surviveto constitute the observed dark matter today. This mechanism can produce dark matter with massesfrom the GeV scale to above the PeV scale, including a large region of viable parameter space beyondthe Griest–Kamionkowski bound. Current and future direct detection and collider experiments canprobe much of the viable parameter space.

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Additional indexing

Item Type:Working Paper
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2019
Deposited On:07 Jan 2020 11:23
Last Modified:08 Jan 2020 04:16
Series Name:arXiv.org
ISSN:2331-8422
OA Status:Green
Related URLs:https://arxiv.org/abs/1912.02830

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