Question

whats a tachyon's source?

Answer 1

Hey mate here is your answer》》

Despite having no faster-than-light propagation, such fields are referred to simply as "tachyons" in many sources. Tachyonic fields play an important role in modern physics. Perhaps the most famous is the Higgs boson of the Standard Model of particle physics, which has an imaginary mass in its uncondensed phase.

Hope this answer will help you..《《

Answer 2

Tachyons are theoretically postulated particles that travel faster than light and have 'imaginary' masses.

Hope it helps☺☺
Regard
@Yusuf .