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Dark Dimension

All articles tagged with #dark dimension

science20 days ago•8 min saved

New Study Suggests Primordial Black Holes May Be Five-Dimensional Objects

A new study led by physicist Luis Anchordoqui suggests that if a compact 'dark dimension' exists, primordial black holes (PBHs) must be five-dimensional rather than four-dimensional. This geometry affects their evaporation rates, potentially allowing some to survive for 13.8 billion years. The findings, to be published in Physical Review D on September 28, propose that such objects could explain high-energy neutrino detections by the KM3NeT observatory, though both PBHs and the dark dimension remain hypothetical.

via ScienceAlert|

#dark-dimension #hawking-radiation #km3net

science3 months ago•11 min saved

Hidden Dimension May Unify Dark Energy and Dark Matter

New observations hint that dark energy may not be constant and could interact with dark matter. Building on DESI results that dark energy evolves over time, theorists are testing models where the energy density of dark energy and the mass of dark matter change in tandem, potentially via a dark, micron-scale dimension suggested by string theory. In this picture, gravitons could leak into the dark dimension, producing dark gravitons that drive the coupling between the two dark components and possibly helping to resolve the Hubble tension. While intriguing and partially compatible with data, these ideas remain theoretical and require further observational tests.

via Quanta Magazine|

#cosmology #dark-dimension #dark-energy

science5 months ago•35 min saved

Right-Handed Neutrinos Hint at a Hidden Dimension in Dark Dimension Theory

Scientists analyzing data from the Karlsruhe Tritium Neutrino Experiment (KATRIN) explore whether a heavy, right-handed neutrino could reside in a hidden micron-scale dimension as suggested by the Dark Dimension Proposal; by translating KATRIN beta-decay spectra into a test for extra dimensions, they identify two regions where a kink in the spectrum would reveal such a particle, potentially linking neutrino physics to dark matter, dark energy, and a changing cosmological constant and guiding future experiments.

via Yahoo|

#cosmological-constant #dark-dimension #katrin