A renowned Indian origin scientist Prof E.C.G.
The name 'tachyon' (from the Greek 'tachys,' meaning swift/speedy)- particle that travel faster than the speed of light- was first proposed by physicist Arnold Sommerfeld, and was coined by the late Gerald Feinberg of Columbia University. To treat this precisely requires quantum field theory, which gets complicated. Heuristically, the problem is that we can get spontaneous creation of tachyon-anti-tachyon pairs, and then do a runaway reaction, making the vacuum unstable.
TACHYON PARTICLES FREE
This suggests that coming up with a sensible theory of anything except free (non-interacting) tachyons are likely to be difficult. In other words, charged tachyons would probably lead to a runaway reaction releasing an arbitrarily large amount of energy. This would lower their energy, causing them to accelerate more. Since they would move faster than the speed of light in the vacuum, they should produce Cherenkov radiation. This has profound consequences for example, let's say that there were electrically charged tachyons. Furthermore, a zero-energy tachyon is "transcendent", or moves infinitely fast. We can now deduce many interesting properties of tachyons, for example, they accelerate ( p goes up) if they lose energy ( E goes down). Tachyon is the name given to the supposed "fast particle" which would move with v> c. Rest mass will have two values and are given the names tardyon (or bradyon in more modern usage) and luxon, for "slow particle" and "light particle". Another fundamental fact of relativity is that E² − p² =m o² (working in units where c=1) where E is an object's energy, p is its momentum, and m 0 is its rest mass, which we'll just call 'mass'. Photon (light particle or quanta of light) moves with velocity of light because its rest mass is zero or it is already moving with the speed of light. However, it might be possible for an object to exist which always moves faster than light. In special relativity, it is impossible to accelerate an object to the speed of light, or for a massive object to move at the speed of light. This is not strictly speaking the same as the statement that nothing can travel faster than light. In a matter dominated world made up of different particles for which search is still going on to find the God’s particle or so, according to Einstein’s theory of relativistic concept of mass variation Special theory of relativity states that nothing that is moving initially slower than the speed of light can be accelerated to exceed the speed of light.
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