Question

These are the units for ?
\[\left[\frac{GeV}{c^2}\right]\]

Answer 1

We know that
\[E= M\times c^2\]
if E= Gev
then
\[M=\frac{Gev}{c^2}\]
so this is a unit of Mass:D

Answer 2

these are units used for subatomic particles to show there masses.
its \[10^{12}\] electron volts.

Answer 3

energy/

Answer 4

They're units of mass; they're used in particle physics because they're convenient. So, for example, the (Higgs?) boson which was announced yesterday at CERN has a mass around 125 \({\rm GeV} \over c^2\). In all of the coverage you'll notice that it's referred to as 125GeV though. That's really just because it's harder to type (and say) things like \({\rm GeV} \over c^2\) than just GeV, and everyone who works in particle physics would know that we're talking about mass and not energy in that context.

Answer 5

1 GeV/c^2 is approximately the mass of the proton and is 10^9 ev. The rest energy of a proton is 1GeV.