Observations
Relative Masses of 7-Billion-Year-Old Protons and Electrons Confirmed to Match Those of Today’s Particles
December 13th, 2012 |
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The mass of the proton in relation to its much lighter counterpart, the electron, is known to great precision: the proton has 1836.152672 times the mass of the electron. But has it always been so? Quite possibly, according to new research which taps the cosmos as a vast fundamental-physics laboratory. A study of a distant [...]
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