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Bae, Kyu Jung
순수물리이론 연구단
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Demystifying freeze-in dark matter at the LHC

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Title
Demystifying freeze-in dark matter at the LHC
Author(s)
Kyu Jung Bae; Myeonghun Park; Mengchao Zhang
Subject
Astronomy & Astrophysics, ; Physics, Particles & Fields
Publication Date
2020-06
Journal
PHYSICAL REVIEW D, v.101, no.11, pp.115036-1 - 115036-11
Publisher
AMER PHYSICAL SOC
Abstract
© 2020 authors. Freeze-in mechanism provides robust dark matter production in the early Universe. Because of its feeble interactions, freeze-in dark matter leaves signals at colliders which are often involved with long-lived particle decays and consequent displaced vertices (DV). In this paper, we develop a method to read off mass spectrum of particles being involved in the DV events at the LHC. We demonstrate that our method neatly works under limited statistics, detector resolution, and smearing effects. The signature of DV at the LHC can come from either highly suppressed phase space or a feeble coupling of particle decay processes. By measuring invisible particle mass spectrum, one can discriminate these two cases and thus extract information of dominant freeze-in processes in the early Universe at the LHC
URI
https://pr.ibs.re.kr/handle/8788114/7801
DOI
10.1103/PhysRevD.101.115036
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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