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Constraints on the simultaneous variation of the fine structure constant and electron mass in light of DESI BAO data

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arxiv 2504.09136 v1 pith:FTIAQF73 submitted 2025-04-12 astro-ph.CO gr-qchep-ph

Yo Toda , Osamu Seto This is my paper · ORCID
classification astro-ph.COgr-qchep-ph
keywords dataalphadesivariationelectronmassconstantconstraints
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abstract

We study the cosmological constraints of the time variation of the electron mass $m_e$ and the fine-structure constant $\alpha$, using data of cosmic microwave background, supernovae light curve and baryon acoustic oscillation (BAO) data including the recent DESI BAO DR2 measurements. The results are slightly depending on the BAO data set included in the analysis. The latest DESI BAO DR2 data strongly indicates that $m_e$ or $\alpha$ is slightly larger than the previous data from 6DF+SDSS and DESI BAO DR1. We also compare the varying $m_e$ model, the varying $\alpha$ model, and the simultaneous variation of $m_e$ and $\alpha$. When considering the Hubble tension, a larger electron mass is the most promising option and the variation of the fine-structure constants does not alleviate the tension.

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Forward citations

Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Direct Detection of Cosmic Walls with Paleo Detectors

    hep-ph 2025-05 conditional novelty 6.0 of 10

    Ancient minerals could preserve parallel damage tracks left by a passing cosmic wall, enabling a direct search for these rare objects with paleo detectors.

  2. Signatures of Modified Gravity on Linear Scales in a Dynamical Dark Energy Background

    astro-ph.CO 2026-05 unverdicted novelty 5.0 of 10

    Using Planck, DESI, supernovae, and redshift-space distortions, the authors infer that modified gravity, if present, must act only below ~30 Mpc and cannot modify the large scales previously considered.

  3. Constraints on Barrow and Tsallis Holographic Dark Energy from DESI DR2 BAO data

    gr-qc 2025-06 conditional novelty 5.0 of 10

    Barrow and Tsallis holographic dark energy models fit DESI DR2 data but are disfavored by information criteria versus LambdaCDM and do not ease the Hubble tension.

  4. Hubble tension: a short review of theoretical explanations

    astro-ph.CO 2026-07 accept novelty 4.0 of 10

    A comprehensive review finds no theoretical Hubble-tension solution yet passes all consistency tests; new early-dark-energy chains reach high H0 only when the SH0ES calibration is added.

  5. Constraint on Symmetric Teleparallel Gravity with Different Dark energy Parametrizations from DESI DR2 BAO Data

    gr-qc 2025-07 reject novelty 4.0 of 10

    MCMC fits of CPL and BA dark energy parametrizations in power-law f(Q) gravity to DESI DR2 and prior BAO H(z) data find statistically competitive or better fits than Lambda-CDM.

  6. The Hubble tension: A decade review

    astro-ph.CO 2026-06 unverdicted novelty 3.0 of 10

    Pure early or late fixes to the Hubble tension are tightly constrained; remaining options are combined early-late interacting dark energy or new physics at the local-to-homogeneous transition.

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