Can you give me the definition of "Takyons" and are they proven to excist?

A takyon is a theoretical particle which never has a speed lower than the speed of light. They are supposedly unique in the way that when their energy increases their velocity decreases. They also break the rule of E=mc2 which states that nothing can go faster than the speed of light. Their existence has never been proven and is doubted by many scientists, although they appear in the string theory. Have a nice day!

Hur ska jag översätta: enveloped particle på bästa sätt?:-P

Man skulle kunna översätta "enveloped particle" som "partikelns hölje". Alltså något som skyddar partikeln i fråga. Ha en fortsatt trevlig dag!

Vad heter partikel på engelska?

Den engelska översättningen på partikel är particle. Ha en bra dag!