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gturner April 17 2014 02:21 AM

CERN confirms probable tetraquark particle
 
They've confirmed the particle, called Z(4430), and have seen thousands of them, and think it is made up of two quarks and two anti-quarks, showing that four-quark particles exist, and perhaps occur in neutron stars.

Daily Mail link

New Scientist link

Any suggestions for a better name than Z(4430)?

I think they should call it a 'groupon'.

Metryq April 17 2014 11:31 AM

Re: CERN confirms probable tetraquark particle
 
"Confirms probable"? That's a definite maybe.

"Groupon" sounds about right. It's the particle responsible for scientific "consensus."

YellowSubmarine April 17 2014 11:37 AM

Re: CERN confirms probable tetraquark particle
 
There... are... four... Quarks!

Chemahkuu April 17 2014 02:59 PM

Re: CERN confirms probable tetraquark particle
 
Well Baryon already means heavy, so something suggesting superheavy or its dual-meson nature, literally twice their internal arrangement. Or just something with 4 in it, Quadrons?

YellowSubmarine April 17 2014 03:52 PM

Re: CERN confirms probable tetraquark particle
 
Suck it, baryons, some mesons are heavier than you are. And tetraquark sounds fine enough to me, especially if the more exotic pentaquarks and heptaquarks turn out to be more than physicist fantasies and reclaim the lost weight... err, mass of baryons. (Too bad they couldn't account for the missing mass of the universe. Then baryons would be the real victors. Alas, that is impossible.)

Whatever, a particle that's charm anti-charm down anti-up sounds... Intriguing.

P.S. Is this indeed confirmed to be a tetraquark? Previously discovered particles like Zc(3900) are also suspected to be tetraquarks, but haven't been confirmed to be such as of yet(?)

USS Triumphant April 17 2014 04:06 PM

Re: CERN confirms probable tetraquark particle
 
Quote:

YellowSubmarine wrote: (Post 9484546)
Whatever, a particle that's charm anti-charm down anti-up sounds... Intriguing.

I found it strangely charming, myself. :D

gturner April 17 2014 04:32 PM

Re: CERN confirms probable tetraquark particle
 
Quote:

YellowSubmarine wrote: (Post 9484546)
P.S. Is this indeed confirmed to be a tetraquark? Previously discovered particles like Zc(3900) are also suspected to be tetraquarks, but haven't been confirmed to be such as of yet(?)

The particle is confirmed (a couple thousand observations), but I don't think they're completely certain that it's a tetraquark, but they indicate that an entanglement of two paired-quarks doesn't work out to the right mass, making a tetraquark the best explanation.

I'm still pushing for a word that describes a group of quarks, which would obviously be a groupon. It's trendy!

varek April 19 2014 02:36 PM

Re: CERN confirms probable tetraquark particle
 
Please forgive an Engineer's question, but would a four-quark particle be considered "dark matter"?

gturner April 19 2014 05:44 PM

Re: CERN confirms probable tetraquark particle
 
Probably not, since they've observed thousands of examples of this particular particle in their detectors, while dark matter seems to escape detection, at least by conventional means used by astronomers. The articles don't go into enough detail to really speculate on it.

Also, dark matter must be extremely commonplace to have the postulated effects, while so far we've only managed to make a couple thousand of these particles, which is hardly enough mass to even make a virus particle, much less outweigh stars.

JarodRussell April 19 2014 07:25 PM

Re: CERN confirms probable tetraquark particle
 
So funny, I was just watching this episode of Stargate:


Hober Mallow April 23 2014 03:39 AM

Re: CERN confirms probable tetraquark particle
 
Quote:

YellowSubmarine wrote: (Post 9484183)
There... are... four... Quarks!

Four quarks for Master Mark!

Gov Karnstein April 23 2014 09:17 AM

Re: CERN confirms probable tetraquark particle
 
Quote:

Hober Mallow wrote: (Post 9502453)
Quote:

YellowSubmarine wrote: (Post 9484183)
There... are... four... Quarks!

Four quarks for Master Mark!

And two Barnstables. http://www.jeffbots.com/quark3.jpg

publiusr April 27 2014 10:03 PM

Re: CERN confirms probable tetraquark particle
 
I've heard of the tetraneutron before: http://en.wikipedia.org/wiki/Tetraneutron
But this is a good deal different.

One more reason Superconducting Supercollider should have been finished. LHC is weak compared to that.


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