Tachoni

Tachoni is a hypothetical particle that, if it exists, would travel faster than the speed of light. The concept of the tachyon was first introduced in physics by Arnold Sommerfeld and later explored by Gerald Feinberg. The name "tachyon" comes from the Greek word "tachys," meaning "swift."

According to the theory of special relativity, objects with mass require an infinite amount of energy to reach the speed of light, and therefore cannot exceed it. Tachyons are theorized to be particles that *always* travel faster than light. This implies they would have imaginary mass, a concept that is not observed in any known particles.

If tachyons were real, they could potentially lead to paradoxes, such as causality violations, where an effect could precede its cause. For instance, a tachyon could theoretically be sent back in time. Due to these theoretical difficulties and the lack of any experimental evidence, tachyons remain a speculative concept in theoretical physics. Scientists continue to investigate the possibility of their existence, but no definitive proof has been found. The search for tachyons is an ongoing area of research in particle physics and cosmology.