Tachyon helicity refers to the intrinsic angular momentum of a tachyon, which is a hypothetical particle that travels faster than the speed of light. It is a property that describes the direction of spin of the tachyon.
Tachyon helicity is measured by observing the direction of travel of the tachyon and the direction of its spin. This can be done through experiments and calculations based on theoretical models.
According to current theories, tachyon helicity cannot change. This is because tachyons are always traveling faster than the speed of light, and therefore do not experience time in the same way as other particles. As a result, they do not have the opportunity to interact with other particles and change their helicity.
Fermions are a type of particle that follow the rules of Fermi-Dirac statistics, which govern the behavior of particles with half-integer spin. Tachyons, on the other hand, are thought to have integer spin. Therefore, the study of tachyon helicity and its potential change in fermions can provide insights into the relationship between spin and statistics in particle physics.
At this point, tachyons and their properties, including helicity, are still largely theoretical. However, if tachyons are found to exist and can be studied, their helicity could potentially have implications for our understanding of fundamental physics and the nature of the universe. It could also have technological applications in areas such as communication and energy transfer, although this is purely speculative at this point.