Cosmological constraints on Newton's constant

Ken Ichi Umezu, Kiyotomo Ichiki, Masanobu Yahiro

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)


We present cosmological constraints on deviations of Newton's constant at large scales without specifying a model, analyzing latest cosmic microwave background (CMB) anisotropies and primordial abundances of light elements synthesized by big bang nucleosynthesis (BBN). BBN limits the possible deviation at typical scales of BBN epoch, say at 108-1012 m, to lie between -5% and +1% of the experimental value, and CMB restricts the deviation at larger scales 102-109 pc to be between -26% and +66% at the 2σ confidence level. The cosmological constraints are compared with the astronomical one from the evolution of isochrone of globular clusters.

Original languageEnglish
Article number044010
Pages (from-to)1-5
Number of pages5
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number4
Publication statusPublished - Aug 15 2005

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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