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Science and Technology "Somewhere, something incredible is waiting to be known." - Carl Sagan.

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Old April 17 2014, 02:21 AM   #1
gturner
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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'.
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Old April 17 2014, 11:31 AM   #2
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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."
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Old April 17 2014, 11:37 AM   #3
YellowSubmarine
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Re: CERN confirms probable tetraquark particle

There... are... four... Quarks!
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Old April 17 2014, 02:59 PM   #4
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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?
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Old April 17 2014, 03:52 PM   #5
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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(?)
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Old April 17 2014, 04:06 PM   #6
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Re: CERN confirms probable tetraquark particle

YellowSubmarine wrote: View Post
Whatever, a particle that's charm anti-charm down anti-up sounds... Intriguing.
I found it strangely charming, myself.
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Old April 17 2014, 04:32 PM   #7
gturner
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Re: CERN confirms probable tetraquark particle

YellowSubmarine wrote: View Post
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!
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Old April 19 2014, 02:36 PM   #8
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Re: CERN confirms probable tetraquark particle

Please forgive an Engineer's question, but would a four-quark particle be considered "dark matter"?
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Old April 19 2014, 05:44 PM   #9
gturner
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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.
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Old April 19 2014, 07:25 PM   #10
JarodRussell
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Re: CERN confirms probable tetraquark particle

So funny, I was just watching this episode of Stargate:

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Old April 23 2014, 03:39 AM   #11
Hober Mallow
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Re: CERN confirms probable tetraquark particle

YellowSubmarine wrote: View Post
There... are... four... Quarks!
Four quarks for Master Mark!
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Old April 23 2014, 09:17 AM   #12
Gov Kodos
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Re: CERN confirms probable tetraquark particle

Hober Mallow wrote: View Post
YellowSubmarine wrote: View Post
There... are... four... Quarks!
Four quarks for Master Mark!
And two Barnstables. http://www.jeffbots.com/quark3.jpg
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Old April 27 2014, 10:03 PM   #13
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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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