More is Different: Non-Minimal Dark Sectors and their Implications for Particle Physics, Astrophysics, and Cosmology -- 13 Take-Away Lessons for Snowmass 2021

Thomas, Brooks

doi:10.48550/arxiv.2203.17258

Cited by 3 publications

(4 citation statements)

References 52 publications

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“…Theoretical and phenomenological aspects of multi-component dark matter were investigated in a broad framework termed Dynamical Dark Matter (DDM) by Dienes, Thomas, and their collaborators [31][32][33][34][35][36][37][38][39][40]. The relation between the Continuum DM framework and DDM was discussed in ref.…”

Section: Jhep05(2024)215mentioning

confidence: 99%

Collider signatures of near-continuum dark matter

Ferrante,

Lee,

Perelstein

2024

J. High Energ. Phys.

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In this paper we study a near-continuum dark matter model, in which dark sector consists of a tower of closely spaced states with weak-scale masses. We construct a five-dimensional model which naturally realizes this spectrum. The dark matter is described by a bulk field, which interacts with the brane-localized Standard Model sector via a Z portal. We then study collider signatures of this model. Near-continuum dark matter states produced in a collider undergo cascade decays, resulting in events with high multiplicity of jets and leptons, large missing energy, and displaced vertices. A custom-built Monte Carlo tool described in this paper allows for detailed simulation of the signal events. We present results of such simulations for the case of electron-positron collisions.

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Section: Jhep05(2024)215mentioning

confidence: 99%

Collider signatures of near-continuum dark matter

Ferrante,

Lee,

Perelstein

2024

J. High Energ. Phys.

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“…Taken further, dark sectors could reach or exceed the complexity of the Standard Model, for example in the class of Hidden Valley models [525] where a portal particle feebly couples ordinary matter to a more complex dark spectrum. Dark sector models can include a large number of states with different masses and lifetimes, where a viable DM candidate arises from the uncharged states of the dark sector [526][527][528][529]. These lead to qualitatively different signals with respect to WIMP dark matter.…”

Section: Beyond Wimp Dark Mattermentioning

confidence: 99%

The Future of US Particle Physics: The Energy Frontier Report – 2021 US Community Study on the Future of Particle Physics

Reina¹,

Tricoli²,

Begel³

et al. 2022

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The Energy Frontier (EF) aims at investigating the fundamental physics of the Universe at the highest energies or -equivalently -the shortest timescales after the Big Bang. We investigate open questions and explore the unknown using various probes to discover and characterize the nature of new physics, through the breadth and multitude of collider physics signatures. While the naturalness principle suggests new physics to lie at mass scales close to the electroweak scale, in many cases direct searches for specific models have placed strong bounds around 1-2 TeV. Thus, the energy frontier has moved beyond the TeV scale and the exploration of the 10 TeV scale becomes crucial to shed light on physics beyond the Standard Model (SM).We need to use both energy reach and precision measurements to push beyond the 1 TeV scale in our exploration. The quest for new physics will be thus conducted in a two-tier approach: 1) looking for indirect evidence of beyond-the-Standard-Model physics (BSM) through precision measurements of the properties of the Higgs boson and other SM particles, and 2) searching for direct evidence of BSM physics at the energy frontier, reaching multi-TeV scales.The EF currently has a top-notch program with the LHC and the High Luminosity LHC (HL-LHC) at CERN, which sets the basis for the EF vision. The EF supports continued strong US participation in the success of the LHC, and the HL-LHC construction, operations, computing and software, and most importantly in the physics research programs, including auxiliary experiments.The discussions on projects that extend the reach of the HL-LHC underlined that preparations for the next collider experiments have to start now to maintain and strengthen the vitality and motivation of the community. Colliders are the ultimate tool to carry out such a program thanks to the broad and complementary set of measurements and searches they enable. Several projects have been proposed such as ILC, CLIC, FCC-ee, CEPC, Cool Copper Collider (C 3 ) or HELEN for e + e − Higgs Factories, and CLIC at 3 TeV centre-of-mass energy, FCC-hh, SPPC and Muon Collider for multi-TeV colliders. For a detailed discussion of timeline, cost, challenges of those accelerator projects we refer to the Accelerator Frontier Integration Task-Force (ITF) report [1] and Appendix A.3. Dedicated fora were established across frontiers to bring together diverse expertise in the study of future e + e − and µ + µ − colliders. Results from their studies are available in their reports [2, 3] and have informed the studies presented in this report.All proposed collider physics experiments need complex detectors as well as software and computing infrastructure, with cutting-edge technologies to meet their ambitious physics goals. The needs extend beyond generic R&D. Experience from R&D and building previous experiments informs us that it takes about 10 years from CD-0 (Critical Decision -0) to the end of construction of a collider detector. For e + e − Higgs factories, immediate investment in targeted detector R&...

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“…The microscopic nature of dark matter (DM) is one of the most pressing issues in fundamental physics, as no known elementary particle has the right properties to make up DM. An interesting possibility is that DM particles are part of a "dark sector", a set of fields that are uncharged under the Standard Model (SM) gauge group [1,2]. A dark sector may contain its own gauge interactions and matter fields, and may indeed have a level of complexity and structure similar to or exceeding the SM.…”

Section: Jhep02(2023)221 1 Introductionmentioning

confidence: 99%

“…However, very generically, we can expect the dark sector to interact, at some level, with the non-conformal sector containing SM. 1 These interactions necessarily lead to breaking of the conformal symmetry in the dark sector. While the SM-CFT coupling may be perturbatively small in the UV, it grows with decreasing energy if the interaction involves a relevant operator (dimension< 4) in the CFT.…”

Section: Jhep02(2023)221 1 Introductionmentioning

confidence: 99%

Dark matter from a conformal Dark Sector

Hong

Kurup

Perelstein

2023

J. High Energ. Phys.

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We consider theories in which a dark sector is described by a Conformal Field Theory (CFT) over a broad range of energy scales. A coupling of the dark sector to the Standard Model breaks conformal invariance. While weak at high energies, the breaking grows in the infrared, and at a certain energy scale the theory enters a confined (hadronic) phase. One of the hadronic excitations can play the role of dark matter. We study a “Conformal Freeze-In” cosmological scenario, in which the dark sector is populated through its interactions with the SM at temperatures when it is conformal. In this scenario, the dark matter relic density is determined by the CFT data, such as the dimension of the CFT operator coupled to the Standard Model. We show that this simple and highly predictive model of dark matter is phenomenologically viable. The observed relic density is reproduced for a variety of SM operators (“portals”) coupled to the CFT, and the resulting models are consistent with observational constraints. The mass of the COFI dark matter candidate is predicted to be in the keV-MeV range.

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More is Different: Non-Minimal Dark Sectors and their Implications for Particle Physics, Astrophysics, and Cosmology -- 13 Take-Away Lessons for Snowmass 2021

Cited by 3 publications

References 52 publications

Collider signatures of near-continuum dark matter

Collider signatures of near-continuum dark matter

The Future of US Particle Physics: The Energy Frontier Report – 2021 US Community Study on the Future of Particle Physics

Dark matter from a conformal Dark Sector

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