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WIMPZILLAS!
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There are many reasons to believe the present mass density of the universe is dominated by a weakly interacting massive particle (WIMP), a fossil relic of the early universe. Theoretical ideas and experimental efforts have focused mostly on production and detection of thermal relics, with mass typically in the range a few GeV to a hundred GeV. Here, I will review scenarios for production of nonthermal dark matter. Since the masses of the nonthermal WIMPS are in the range 10^{12} to 10^{16} GeV, much larger than the mass of thermal wimpy WIMPS, they may be referred to as WIMPZILLAS. In searches for dark matter it may be well to remember that ``size does matter.''
Forward citations
Cited by 10 Pith papers
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Searching for heavy charged relics in the Earth
Galactic CHAMPs of mass 1–10^{12} TeV can be discovered by mining their accumulation in monitored water/ice and ancient rocks, enriching via gravity or centrifuges, and identifying them with mass spectrometry down to ...
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New Limits on Charged Dark Matter from Large-Scale Coherent Magnetic Fields
The intact interstellar gas disk of the Milky Way implies charged dark matter must have charge-to-mass ratio below about 10^-13 e/GeV, unless it makes up only a small fraction of dark matter.
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Cosmological gravitational particle production in multifield inflation
Negative field-space curvature enhances post-inflationary Ricci scalar oscillations and boosts CGPP dark matter number density by up to an order of magnitude relative to flat field-space cases, with nontrivial relic a...
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Tachyonic particle production: quantum 2PI formalism with momentum exchanging collisions
Presents a self-consistent reduction of non-local next-to-leading-order 2PI equations to local quantum kinetic equations that incorporate momentum exchange during tachyonic instabilities.
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The effects of non Bunch-Davies initial conditions on gravitationally produced relics
Non-Bunch–Davies initial conditions can drastically change gravitationally produced vector dark matter abundances, opening a wider viable mass range.
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Superheavy Dark Matter from the String Theory Axiverse
Heavy axions from a simple string-theory compactification can be produced in large numbers by gravitational particle production at the end of inflation and can account for all dark matter, provided they remain stable ...
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Gravitational Dark Matter Production in Supergravity $\alpha$-Attractor Inflation
Supergravity corrections in α-attractor inflation suppress gravitational dark matter production and shift the required reheating temperature to 10^3-10^7 GeV.
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Multiscatter capture of superheavy dark matter by Pop. III stars
Annihilation of captured superheavy dark matter can set a dark-matter-dependent upper limit on the mass of the first stars.
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Constraints on Ultra-heavy DM from TeV-PeV gamma-ray diffuse measurements
HAWC and LHAASO diffuse gamma-ray data, modeled with prompt, inverse-Compton, absorption, and astrophysical background, produce the strongest constraints on decaying ultra-heavy dark matter above ~100 TeV.
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Testing Heavy Dark Matter Decay as the Origin of KM3-230213A
Assuming the KM3-230213A event comes from heavy dark matter decay, the preferred mass exceeds 100 PeV at 95% CL with lifetimes of 10^26-10^27 s, but these regions conflict with bounds from other neutrino telescopes an...
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