Nonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures

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Abstract
  • A preponderance of astrophysical and cosmological evidence indicates that the universe contains not
    only visible matter but also dark matter. In order to suppress the couplings between the dark and visible
    sectors, a standard assumption is that these two sectors communicate only through a mediator. In this paper
    we make a simple but important observation: if the dark sector contains multiple components with similar
    quantum numbers, then this mediator also generically gives rise to dark-sector decays, with heavier dark
    components decaying to lighter components. This in turn can even give rise to relatively long dark decay
    chains, with each step of the decay chain also producing visible matter. The visible byproducts of such
    mediator-induced decay chains can therefore serve as a unique signature of such scenarios. In order to
    investigate this possibility more concretely, we examine a scenario in which a multicomponent dark sector
    is connected through a mediator to Standard-Model quarks. We then demonstrate that such a scenario gives
    rise to multijet collider signatures, and we examine the properties of such jets at both the parton and
    detector levels. Within relatively large regions of parameter space, we find that such multijet signatures are
    not excluded by existing monojet and multijet searches. Such decay cascades therefore represent a potential
    discovery route for multicomponent dark sectors at current and future colliders.
TitleNonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures
CreatorThomas, Brooks
Dienes, K. R.
Kim, D.
Yaylali, D.
Song, H.
Su, S.
PublisherPhysical Review D
Academic DepartmentPhysics
DivisionNatural Sciences
OrganizationLafayette College
Date IssuedApril 30, 2020
Date Available2020-04-30
TypeArticle
LanguageEnglish
Bibliographic CitationDienes, K. R., et al (2020 Apr 30) "Nonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures." Physical Review D 101 (7): 075024.
Standard IdentifierHandle 10385/02870w27q
DOI 10.1103/PhysRevD.101.075024
Permalinkhttp://hdl.handle.net/10385/02870w27q
Rights Statement Creative Commons - Attribution Creative Commons - Attribution
Rights HoldersThe American Physical Society
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