Particles: X(3872) and Z(4430) ?

[Openeye]

Does anyone have more info about this?

http://en.wikipedia.org/wiki/X(3872 )
http://en.wikipedia.org/wiki/Z(4430 )

Are these not considered fundamental or what makes them so different?



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Additional info requested posted 'separately' so as not to contaminate the thread with http://pastebay.com/114417" If you are addressing this side info please PM me so we can keep this thread about X(3872) and Z(4430) and not supposedly 're-open' the thread that's CLOSED. (I don't get it... how can _I_ (a non-moderator) re-open a thread that is closed/locked?)

Also, I originally posted my 'other' (no link to it) thread into quantum physics forum, but it was moved to this general physics forum. If I am asking a quantum physics question here, sorry, I am only posting here because I figure it would end up back here. Feel free to move it as necessary.


Thanks.

 

[Drakkith]

Looks to me like we don't have enough evidence to make a determination on what exactly they are. However, it does seem that they are made of quarks and are therefore not fundamental.