I'm very interested in particle physics, and I grasp the basic concepts. The problem that is keeping me from fully understanding the subject is the masses of these sub-atomic particles is measured in electron volts. So what is it's mass or, what is it?
by 
that one guy
ANSWERS: 2
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Why mass in particle physics is measures in volts (measurement of energy) is because mass and energy are interchangeable. Note that velocity is also part of the equation. Particles are nearly alway on the move. When dealing with say the proton the sum of its mass is greater than its parts (quarks) due to the energy or the velocity of the quarks within the proton. That is woefully simplistic there, a few links that may clear it up for you. http://hypertextbook.com/physics/modern/qcd/ migt be more helpful. and http://www.newton.dep.anl.gov/askasci/phy00/phy00879.htm http://www.newton.dep.anl.gov/askasci/phy00/phy00020.htm gives a "good" kilogram measurement to the proton. I suspect if you search mass in kilogram for ________ (insert particle here) you will find similar information. http://burro.astr.cwru.edu/johnf/scales.rev.txt gives a lot of "constants" way down near the middle you find the metric mass (in kg) of protons and electrons: 9.11 x 10^{-31} kilograms Electron mass 1.67 x 10^{-27} kilograms Proton mass
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electron is massless at rest and at light speed the mass of an electron is a fraction of a proton. An electron is never at rest.
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