Particle Rest Energies

Class

Name

Rest energy

 

 

MeV

photon

photon

0

lepton

electron neutrino

0

 

muon neutrino

 

 

electron

0.511004

 

muon

105.659

mesons

pion (charged)

139.576

 

pion (neutral)

 

 

kaon (charged)

493.821

 

kaon (neutral)

497.762

baryons

proton

938.257

 

neutron

939.551