This has been proposed as an intuitive explanation of Zitterbewegung, as these massless components would propagate at the speed of light and move in opposite directions, since the helicity is the projection of the spin onto the direction of motion. Here the role of the "mass" is not to make the velocity less than the speed of light, but instead controls the average rate at which these reversals occur; specifically, the reversals can be modeled as a Poisson process.
This has been proposed as an intuitive explanation of Zitterbewegung as these massless components would propagate at the speed of light and move in opposite directions since the helicity is the projection of the spin onto the direction of motion Here the role of the "mass" is not to make the velocity less than the speed of light but instead controls the average rate at which these reversals occur; specifically the reversals can be modeled as a Poisson process