Particle that only has mass when moving in one direction observed for first time

For the first time, scientists have observed a collection of particles, also known as a quasiparticle, that's massless when ...
IFLScience on MSN

First Observation Of A Quasiparticle That Only Has Mass When Moving In One Direction

A collection of particles known as a quasiparticle has been detected behaving as if it has mass when it moves in one ...
RealClearScience

Strange Particle Only Has Mass Moving in One Direction

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Phys.org

Particle that only has mass when moving in one direction observed for first time

An illustration of the calculated structure of ZrSiS near the crossing points of its structure, showing a semi-Dirac point as a black sphere on the left. Data points as purple dots support the ...