[dleviwing]

Nobody;
Though I personally do not view “Relative Mass” as a different phenomena than “Rest Mass”, our current science dogma does. The mass denoted for any particle or nucleon is Rest Mass, not relativistic mass. Only if the nucleons are accelerated to near the speed of light would the relativistic mass be greater than the rest mass quantity.

In my own concept, mass is a phenomenon that is related to quantitative uniform motion of fundamental substance and its systems. Linear, angular, or wave symmetry motions are all uniform; chaotic electromagnetic wave motion such as space eludes our ability to measure mass of the substance of space or Higgs Bosons; we interpret this motion only as energy.