Is the Zc(3900) particle a genuine discovery?

[physicsphreak2]

While looking for a strange state of matter in two particle accelerators, another, totally unexpected particle has been discovered. Say hello to the Zc(3900) particle, a particle that physicists had no clue could exist.

http://news.discovery.com/space/quirky-4-quark-quantum-monste-discovered-130618.htm

Do you think this is legit? How exciting!

 

[Simon Bridge]

It appears so:
http://www.quantumdiaries.org/2012/01/20/thats-right-count-them-4-quarks/
http://www.nature.com/news/quark-quartet-opens-fresh-vista-on-matter-1.13225
...

 

[mfb]

Add the X(3872) to the list of possible tetraquarks.

I hope they are able to determine the quantum numbers of the Z_c(3900).