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

Kyriakos Vattis, Savvas M. Koushiappas, and Abraham Loeb
Phys. Rev. D 99, 121302(R) – Published 10 June 2019

Abstract

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.

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  • Received 21 March 2019

DOI:https://doi.org/10.1103/PhysRevD.99.121302

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Kyriakos Vattis* and Savvas M. Koushiappas

  • Department of Physics, Brown University, 182 Hope Street, Providence, Rhode Island 02912, USA, and Brown Theoretical Physics Center, 182 Hope Street, Providence, Rhode Island 02912, USA

Abraham Loeb

  • Department of Astronomy, Harvard University, 60 Garden Street, Cambridge, Massachusetts 02138, USA

  • *kyriakos_vattis@brown.edu
  • koushiappas@brown.edu

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Issue

Vol. 99, Iss. 12 — 15 June 2019

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