Running Hubble tension and a H0 diagnostic

C. Krishnan, E. Ó Colgáin, M. M. Sheikh-Jabbari, and Tao Yang
Phys. Rev. D 103, 103509 – Published 10 May 2021

Abstract

Hubble tension is routinely presented as a mismatch between the Hubble constant H0 determined locally and a value inferred from the flat ΛCDM cosmology. In essence, the tension boils down to a disagreement between two numbers. Here, assuming the tension is cosmological in origin, we predict that within flat ΛCDM there should be other inferred values of H0, and that a “running of H0 with redshift” can be expected. These additional determinations of H0 may be traced to a difference between the effective equation of state (EoS) of the Universe within the Friedmann-Lemaître-Robertson-Walker (FLRW) cosmology framework and the current standard model. We introduce a diagnostic that flags such a running of H0.

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  • Received 21 November 2020
  • Accepted 25 March 2021

DOI:https://doi.org/10.1103/PhysRevD.103.103509

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

C. Krishnan1,*, E. Ó Colgáin2,3,†, M. M. Sheikh-Jabbari4,‡, and Tao Yang2,§

  • 1Center for High Energy Physics, Indian Institute of Science, Bangalore 560012, India
  • 2Asia Pacific Center for Theoretical Physics, Postech, Pohang 37673, Korea
  • 3Department of Physics, Postech, Pohang 37673, Korea
  • 4School of Physics, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531 Tehran, Iran

  • *chethan.krishnan@gmail.com
  • ocolgain.eoin@apctp.org
  • shahin.s.jabbari@gmail.com
  • §tao.yang@apctp.org

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Vol. 103, Iss. 10 — 15 May 2021

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