Using particle physics to test the principle of relativity

According to the Special Theory of Relativity, every inertial frame is equivalent; there should be no fixed resting frame in our universe. Such an assumption, however, could be in conflict with the Standard Model of cosmology today, which regards the vacuum not as an empty space. Thus, there is an urgent need to test experimentally whether there is a resting frame in our universe or not. We propose that this can be done by precisely measuring the masses of two charged particles moving in opposite directions. If all inertial frames are equivalent, there should be no detectable mass difference between these two particles. If there is a resting frame in the universe, one will observe a mass difference that is dependent on the orientation of the laboratory frame. The detailed experimental setup is discussed in this paper. Our analysis shows that, with the current technological capabilities, the proposed measurement should have sufficient accuracy to determine whether there is a resting frame in our universe or not.