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Supercool Composite Dark Matter Beyond 100 TeV
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abstract
Dark Matter could be a composite state of a confining sector with an approximate scale symmetry. We consider the case where the associated pseudo-Goldstone boson, the dilaton, mediates its interactions with the Standard Model. When the confining phase transition in the early universe is supercooled, its dynamics allows for Dark Matter masses up to $10^6$ TeV. We derive the precise parameter space compatible with all experimental constraints, finding that this scenario can be tested partly by telescopes and entirely by gravitational waves.
Forward citations
Cited by 6 Pith papers
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Can the universe be matter-dominated after a supercooled first-order phase transition?
After a supercooled first-order phase transition, the scalar field's equation of state is set by the bubble-wall Lorentz factor γ*, and matter domination is delayed until a/a* ≃ γ* in the free-streaming limit.
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Particle productions during collisions of highly boosted bubble walls
Bubble-wall collisions produce ultra-heavy particles with a universal spectrum ∝ [V'(2vφ)]²/χ⁴, localized at the collision instant.
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Particle Production via Rippled Bubble Walls
A rippled bubble wall produces heavy particles resonantly when the momentum transfer matches the ripple frequency, potentially raising dark-matter abundance by orders of magnitude.
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Theoretical uncertainties in reconstructing model parameters with gravitational waves from supercooled phase transitions
In the conformal U(1)_X model, the daisy-resummed nucleation scheme shifts LISA-reconstructed gauge couplings by O(10%) relative to the NLO effective-field-theory result, an order of magnitude above the Fisher-matrix ...
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Acoustically driven dark matter freeze-out
Thermal dark matter freeze-out under small-scale acoustic density perturbations requires about a 10 percent larger annihilation cross section to match the observed relic abundance.
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Dark matter in composite Higgs models with a scotogenic EFT
In the SU(6)/Sp(6) composite Higgs model with a scotogenic Z2, three of four neutral pseudo-Goldstone dark matter candidates can reproduce the observed relic density, while the SU(2)L triplet candidate fails; spin-1 r...
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