Are their any hypothetical elementary particles?

[Maximum7]

Besides the graviton, tachyon and axion?

 

[IronWing]

thereyon

 

[Iron Woode]

Are their any hypothetical elementary particles?

Their? Perhaps there should be a grammar particle?

 

[Iron Woode]

serious answer: magnetic monopoles.

 

[sandorski]

Their? Perhaps there should be a grammar particle?

Very elusive, difficult to find.

 

[Fritzo]

Yes...dozens. The graviton is probably the most famous. Coolest sounding is the "dark photon"...which would be related to the radiation emitted by dark matter.

Here: https://en.wikipedia.org/wiki/Category:Hypothetical_elementary_particles