Is the Proton-to-Electron Mass Ratio Really Changing?

[simon009988]

There was a recent article in nature on how there was "INDICATIONS OF A CHANGE IN THE PROTON-TO-ELECTRON MASS RATIO have shown up in comparisons of the spectra of hydrogen gas as recorded in a lab with spectra of light coming from hydrogen clouds at the distance of quasars. "


I was just wondering how ture people think this is.
Could this constant really be changing?

 

[Curious3141]

Better with a reference : http://Newton.ex.ac.uk/aip/physnews.774.html

 

[ZapperZ]

As with the purported claim of the changing fine structure constant with time, these things need to be verified independently using a different method to be convincing.

Zz.

 

[rbj]

and, to repeat from older threads, it is these dimensionless "constants" that count. if m_e/m_p changes or if \alpha changes, that means something. claims made about a changing c or G are meaningless. we can only measure these quantities against like dimensioned standards (like a carpenter measuring length with a tape-measure) and we measure or ultiimately sense only dimensionless quanitities. if something has noticeably changed, it was a ratio of like dimensioned quantities and to blame that change on any single dimesionful component (like blaming it on m_p) is misleading.

so at least the OP is inquiring about a meaningful issues.