Geophysical constraint on a relic background of the dilatons

Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

6 pages, Proceedings for the 8th Edoardo Amaldi Conference on Gravitational Waves, 21-26 June, 2009, Columbia University, New

Scientific paper

10.1088/1742-6596/228/1/012048

According to a scenario in string cosmology, a relic background of light dilatons can be a significant component of the dark matter in the Universe. A new approach of searching for such a dilatonic background by observing Earth's surface gravity was proposed in my previous work. In this paper, the concept of the geophysical search is briefly reviewed, and the geophysical constraint on the dilaton background is presented as a function of the strength of the dilaton coupling, $q_b^2$. For simplicity, I focus on massless dilatons and assume a simple Earth model. With the current upper limit on $q_b^2$, we obtain the upper limit on the dimensionless energy density of the massless background, $\Omega_{DW}h^2_{100} \leq 6 \times 10^{-7}$, which is about one-order of magnitude more stringent than the one from astrophysical observations, at the frequency of $\sim$ 7 $\times$ 10$^{-5}$ Hz. If the magnitude of $q_b^2$ is experimentally found to be smaller than the current upper limit by one order of magnitude, the geophysical upper limit on $\Omega_{DW}h^2_{100}$ becomes less stringent and comparable to the one obtained from the astrophysical observations.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Geophysical constraint on a relic background of the dilatons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Geophysical constraint on a relic background of the dilatons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geophysical constraint on a relic background of the dilatons will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-203463

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.