Dark matter decaying in the late Universe can relieve the H0 tension

We study the cosmological effects of two-body dark matter decays in which the products of the decay include a massless and a massive particle. We show that if the massive daughter particle is slightly warm it is possible to relieve the tension between distance ladder measurements of the present-day...

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Veröffentlicht in:	Physical review. D 2019-06, Vol.99 (12), p.1
Hauptverfasser:	Vattis, Kyriakos, Koushiappas, Savvas M, Loeb, Abraham
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy & Astrophysics ASTRONOMY AND ASTROPHYSICS Big Bang theory Cosmic microwave background Dark matter Evolution of the Universe Formation & evolution of stars & galaxies Particle dark matter Particle decay Physics Universe
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Zusammenfassung:	We study the cosmological effects of two-body dark matter decays in which the products of the decay include a massless and a massive particle. We show that if the massive daughter particle is slightly warm it is possible to relieve the tension between distance ladder measurements of the present-day Hubble parameter with measurements from the cosmic microwave background.
ISSN:	2470-0010 2470-0029
DOI:	10.1103/PhysRevD.99.121302