Abstract
We present new constraints on cosmic variations of Newton’s gravitational constant by making use of the latest CMB data from WMAP, BOOMERANG, CBI and ACBAR experiments and independent constraints coming from big bang nucleosynthesis. We found that current CMB data provide constraints at the level, that can be improved to by including big bang nucleosynthesis data. We show that future data expected from the Planck satellite could constrain at the level while an ultimate, cosmic variance limited, CMB experiment could reach a precision of about 0.4%, competitive with current laboratory measurements.
- Received 19 May 2009
DOI:https://doi.org/10.1103/PhysRevD.80.023508
©2009 American Physical Society