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Physicists find particle that only has mass when moving in one direction
Scientists have made a satisfying and intriguing physics discovery some 16 years after it was first predicted to be a possibility: a quasiparticle (a group of particles behaving as one) that only has an effective mass when moving in one direction.
Scientists have made a satisfying and intriguing physics discovery some 16 years after it was first predicted to be a possibility: a quasiparticle(a group of particles behaving as one) that only has an effective mass when moving in one direction. Whereas regular quasiparticles have the same mass no matter what their direction of travel, the semi-Dirac fermion(to give it its technical name) being studied here doesn't seem to play by the normal rules. This semi-Dirac fermion detailed in the new study is a strange beast of a thing that only existed in theory up until now, operating under very different guidelines of energy in perpendicular directions.
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