Volume 89, Number 4, February 2010
|Number of page(s)||3|
|Section||Geophysics, Astronomy and Astrophysics|
|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
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
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.