it means fluctuating mass depending on the direction of magnetic fields. To make sure they were indeed analyzing the hypothesized semi-Dirac fermion, the research team subjected the semimetal to ...

Fermi, among others, realized that nuclear fission was accompanied by the release of colossal amounts of energy from the conversion of mass into energy (according to Einstein's mass-energy ...

Take your pick of the Standard Model’s shortcomings: almost all of them motivate the search for additional Higgs bosons.