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Resolving the $H_0$ tension with diffusion

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  • معلومة اضافية
    • Contributors:
      Centre de Physique Théorique - UMR 7332 (CPT); Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS); CPT - E4 Gravité quantique; Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS); Instituto de Ciencias Nucleares Mexico; Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM)
    • بيانات النشر:
      HAL CCSD
      Springer Verlag
    • الموضوع:
      2021
    • Collection:
      Université de Toulon: HAL
    • نبذة مختصرة :
      International audience ; The tension between the value of the Hubble constant $H_0$ determined from local supernovae data and the one inferred from the cosmic microwave background based on the $\Lambda$CDM cosmological model may indicate the need for new physics. Here, we show that this `Hubble tension' can be resolved in models involving an effective energy flux from the matter sector into dark energy resulting naturally from a combination of unimodular gravity and an energy diffusion process. The scheme is one where dark energy has the standard equation of state $w=-1$. This proposal provides an alternative phenomenological paradigm accounting for the observations, while offering a general framework to study diffusion effects coming from novel fundamental physical processes.
    • Relation:
      info:eu-repo/semantics/altIdentifier/arxiv/2001.07536; hal-02470705; https://hal.science/hal-02470705; https://hal.science/hal-02470705/document; https://hal.science/hal-02470705/file/2001.07536.pdf; ARXIV: 2001.07536
    • الرقم المعرف:
      10.1007/s10714-020-02781-0
    • الدخول الالكتروني :
      https://hal.science/hal-02470705
      https://hal.science/hal-02470705/document
      https://hal.science/hal-02470705/file/2001.07536.pdf
      https://doi.org/10.1007/s10714-020-02781-0
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.6579D326