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A tower of hidden sectors: a general treatment and physics implications

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arxiv 2205.07316 v2 pith:OMLLGK3H submitted 2022-05-15 hep-ph astro-ph.CO

Amin Aboubrahim , Pran Nath This is my paper · ORCID
classification hep-phastro-ph.CO
keywords hiddensectorsectorsvisiblecoupledcouplesanalysiscouplings
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abstract

An analysis of a tower of hidden sectors coupled to each other, with one of these hidden sectors coupled to the visible sector, is given and the implications of such couplings on physics in the visible sector are investigated. Thus the analysis considers $n$ number of hidden sectors where the visible sector couples only to hidden sector 1, while the latter couples also to hidden sector 2, and the hidden sector 2 couples to hidden sector 3 and so on. A set of successively feeble couplings of the hidden sectors to the visible sector are generated in such a set up. In general each of these sectors live in a different heat bath. We develop a closed form set of coupled Boltzmann equations for the correlated evolution of the temperatures and number densities of each of the heat baths. We then apply the formalism to a simplified model with scalar portals between the different sectors. Predictions related to dark matter direct detection experiments and future CMB probes of dark radiation are made.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Supercooled Phase Transitions: Why Thermal History of Hidden Sector Matters in Analysis of Pulsar Timing Array Signals

    hep-ph 2025-01 conditional novelty 6.0 of 10

    Tracking the evolving temperature ratio between hidden and visible sectors can change a supercooled hidden-sector phase transition's gravitational wave spectrum by up to four orders of magnitude, reviving it as an exp...

  2. Self-interacting dark matter with observable $\Delta N_{\rm eff}$

    hep-ph 2025-04 conditional novelty 5.0 of 10

    This paper constructs a GeV-scale self-interacting dark matter model with late scalar decays that simultaneously sets the relic abundance and yields an observable Delta Neff in reach of CMB-S4.

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