A substance with negative mass

The conditions for the formation of a substance with negative mass are investigated. critical velocity body ω = 235696.8871 km/s, necessary its transition to massless state, was determined by two independent methods. Zeroing matter also occurs at temperature T =2.17 . 1036 mo (mo is rest particle in grams). At higher temperatures or speeds movement, bodies becomes negative. resulting formulas made it possible calculate masses X,Y-bosons equal 4.606 10-9 g. Superunification four fundamental interactions, including gravity, estimated be 4.72 1031 K.