Dark matter born in cosmic twists

• Autores: Anil Ananthaswamy
• Localización: New scientist, ISSN 0262-4079, Nº. 3165, 2018, pág. 8
• Idioma: inglés
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• Resumen

  • Solving the case of the universe's missing antimatter may help us pin down one other thing people can't seem to find: dark matter. The solution involves a twist in the tale of gravitational waves. Evan McDonough of Brown University in Providence RI, investigated what would happen if this chiral asymmetry wasn't limited to particles. He found that if the infant universe had gravitational waves -- ripples in the fabric of space-time -- with a preferred chirality, that could also create an excess of matter. That led him, with Stephon Alexander at Brown University and David Spergel at Princeton University, to wonder whether the same mechanism could account for dark matter, the unseen mass we detect via its gravitational influence on normal matter.