Nonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures
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 andmore »
- Publication Date:
- Research Org.:
- Univ. of Arizona, Tucson, AZ (United States); Texas A & M Univ., College Station, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- OSTI Identifier:
- 1615067
- Alternate Identifier(s):
- OSTI ID: 1801916
- Grant/Contract Number:
- FG02-13ER41976; SC0009913; SC0010813; PHY-1720430; PHY-1607611
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 101 Journal Issue: 7; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Astronomy & Astrophysics; Physics
Citation Formats
Dienes, Keith R., Kim, Doojin, Song, Huayang, Su, Shufang, Thomas, Brooks, and Yaylali, David. Nonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures. United States: N. p., 2020.
Web. doi:10.1103/PhysRevD.101.075024.
Dienes, Keith R., Kim, Doojin, Song, Huayang, Su, Shufang, Thomas, Brooks, & Yaylali, David. Nonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures. United States. https://doi.org/10.1103/PhysRevD.101.075024
Dienes, Keith R., Kim, Doojin, Song, Huayang, Su, Shufang, Thomas, Brooks, and Yaylali, David. Wed .
"Nonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures". United States. https://doi.org/10.1103/PhysRevD.101.075024.
@article{osti_1615067,
title = {Nonminimal dark sectors: Mediator-induced decay chains and multijet collider signatures},
author = {Dienes, Keith R. and Kim, Doojin and Song, Huayang and Su, Shufang and Thomas, Brooks and Yaylali, David},
abstractNote = {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.},
doi = {10.1103/PhysRevD.101.075024},
journal = {Physical Review. D.},
number = 7,
volume = 101,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2020},
month = {Wed Apr 15 00:00:00 EDT 2020}
}
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https://doi.org/10.1103/PhysRevD.101.075024
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