| Issue |
EPL
Volume 89, Number 4, February 2010
|
|
|---|---|---|
| Article Number | 49001 | |
| Number of page(s) | 3 | |
| Section | Geophysics, Astronomy and Astrophysics | |
| DOI | https://doi.org/10.1209/0295-5075/89/49001 | |
| Published online | 26 February 2010 | |
On the relation between mass of a pion, fundamental physical constants and cosmological parameters
PH Division CERN - CH-1211, Geneva 23, Switzerland
Received:
5
January
2010
Accepted:
22
January
2010
In this article we reconsider the old mysterious relation, advocated by Dirac and Weinberg, between the mass of the pion, the fundamental physical constants, and the Hubble parameter. By introducing the cosmological density parameters, we show how the corresponding equation may be written in a form that is invariant with respect to the expansion of the Universe and without invoking a varying gravitational “constant”, as was originally proposed by Dirac. It is suggested that, through this relation, Nature gives a hint that pions dominate the “content” of the quantum vacuum.
PACS: 95.30.Sf – Relativity and gravitation / 98.80.-k – Cosmology / 95.36.+x – Dark energy
© EPLA, 2010
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