Phantom Braneworld and the Hubble Tension

نویسندگان

چکیده

Abstract Braneworld models with induced gravity exhibit phantom-like behavior of the effective equation state dark energy. They can, therefore, naturally accommodate higher values H 0 , preferred by recent local measurements while satisfying cosmic microwave background constraints. We test evolution in such phantom braneworld scenarios current observational data sets. find that prefers a value even without R19 prior, thereby providing much better fit to measurements. Although this model cannot fully satisfy all combinations cosmological observables, among existing energy candidates brane provides one most compelling explanations evolution.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Observational constraints on phantom-like braneworld cosmologies

We investigate a simple braneworld model in which the universe contains only cold dark matter and a cosmological constant, but the effective dark energy is phantom-like because of extra-dimensional gravity effects. Modified gravity screens the cosmological constant Λ, allowing for a larger Λ. In practice, observations do not favour any significant screening. We use supernova data, the cosmic mi...

متن کامل

Cosmological Constraints on DGP Braneworld Gravity with Brane Tension

Lucas Lombriser, Wayne Hu, Wenjuan Fang, 4 and Uroš Seljak 5, 6 Institute for Theoretical Physics, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland Kavli Institute for Cosmological Physics, Department of Astronomy and Astrophysics, Enrico Fermi Institute, University of Chicago, Chicago, IL 60637 Department of Physics, Columbia University, New York, NY 10027 Brookhaven ...

متن کامل

Braneworld Cosmology and Holography

This thesis is devoted to studying two important aspects of braneworld physics: their cosmology and their holography. We examine the Einstein equations induced on a general (n − 2)-brane of arbitrary tension, embedded in some n-dimensional bulk. The brane energy-momentum tensor enters these equations both linearly and quadratically. From the point of view of a homogeneous and isotropic brane we...

متن کامل

Braneworld Cosmology, the Cmb and the Radion

Recent developments in the theory of extra dimensions have opened up avenues to confront such theories with cosmological tests. We discuss a brane-world model with a bulk scalar field, motivated by supergravity. The low-energy effective action is derived and physical constraints on the parameters of the model discussed. The cosmological evolution of the brane-world moduli is investigated and it...

متن کامل

Natural braneworld inflation and baryogenesis

In natural inflation models, the inflaton is a pseudo Nambu-Goldstone boson and the flatness of the potential is protected by shift symmetries. In this framework, a successful inflation requires the global symmetry to be spontaneously broken at a scale close to the Planck mass. Such a high value of the spontaneous breaking scale may not be legitimate in an effective field theory. On the other h...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Astrophysical Journal

سال: 2021

ISSN: ['2041-8213', '2041-8205']

DOI: https://doi.org/10.3847/1538-4357/ac307e