Interacting dark energy axions in light of the Hubble tension

POSTER

Abstract

A current problem within the ΛCDM framework is the tension between late and early time measurements of the Hubble parameter today, H0.  We entertain the possibility that dark energy modeled as multiple interacting axion-like-particle species can alleviate the current Hubble tension.  We then test these parameters against the milder tension between the CMB and large scale structure (LSS) observations of σ8 to ensure that these models do not exacerbate the tension.  We find that there exist parameter spaces for models of two and three axion-like-particles which can potentially alleviate the Hubble tension as well as the σ8 tension.

*E. M. and L. S. thank the Department of Physics at the University of Cincinnati for financial support in the form of the Joiner Fellowship and the Violet M. Diller Fellowship. L. S. and L. C. R. W. thank the University of Cincinnati Office of Research Faculty Bridge Program for funding through the Faculty Bridge Grant. The research of L. C. R. W has been performed in part at Aspen Center for Physics,which is supported by National Science Foundation grant PHY-1607611.

Publication: Interacting dark energy axions in light of the Hubble tension

Ennis Mawas (Cincinnati U.), Lauren Street (Cincinnati U.), Richard Gass (Cincinnati U.), L.C.R. Wijewardhana (Cincinnati U.)

e-Print: 2108.13317 [astro-ph.CO]

Presenters

  • Ennis Mawas

    • University Of Cincinnati

Authors

  • Ennis Mawas

    • University Of Cincinnati

  • Lauren Street

    • Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA

  • Richard Gass

    • Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA

  • L. C. R. Wijewardhana

    • Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA