Date: 15/04/2014 21:29:20
From: OCDC
ID: 518739
Subject: LHC tetraquark? (Non-holiday)

The Large Hadron Collider may have found a new form of matter

Experiments at the Large Hadron Collider, the overachieving device famous for finding the Higgs boson, have confirmed that a new particle called Z(4430) exists, and is the best evidence to date of a new form of matter called a tetraquark.

Quarks are the subatomic particles that form all matter and are usually found in pairs or triplets – but scientists had long predicted that a new particle Z(4430) could exist that was a combination of four quarks. And now the LHC has spotted as many as 4,000 of the elusive particles, the researchers reported in ArXiv.org.

Before you get too excited, there is still work to be done to determine if Z(4430) really is a tetraquark, and, if so, what that means for us.

Right now, scientists still aren’t 100% sure this type of tetraquark would obey the laws of physics. Thomas Cohen at the University of Maryland in College Park told New Scientist: “Our computers aren’t yet big enough to solve the theory from first principles.”

But the big first hurdle has been overcome – scientists have proved that Z(4430) really does exist and shown there’s still so much we have to discovery about the world we live in.

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Date: 15/04/2014 21:30:46
From: OCDC
ID: 518740
Subject: re: LHC tetraquark? (Non-holiday)

New Scientist

arXiv

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Date: 15/04/2014 21:31:27
From: OCDC
ID: 518741
Subject: re: LHC tetraquark? (Non-holiday)

In summary:

Resonant structures in B 0 →ψ ′ π − K + decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3fb −1 collected with the LHCb detector. The data cannot be described with K + π − resonances alone, which is confirmed with a model-independent approach. A highly significant Z(4430) − →ψ ′ π − component is required, thus confirming the existence of this state. The observed evolution of the Z(4430) − amplitude with the ψ ′ π − mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin-parity is determined unambiguously to be 1 + .

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Date: 15/04/2014 21:33:05
From: Kingy
ID: 518743
Subject: re: LHC tetraquark? (Non-holiday)

Has someone at the LHC broken a quark?

Typical. Give a scientist something and they’ll break it.

Clumsy buggers they are.

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Date: 15/04/2014 21:33:24
From: Michael V
ID: 518744
Subject: re: LHC tetraquark? (Non-holiday)

Amazing! Thanks for that.

:)

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Date: 15/04/2014 21:33:55
From: sibeen
ID: 518745
Subject: re: LHC tetraquark? (Non-holiday)

OCDC said:

Right now, scientists still aren’t 100% sure this type of tetraquark would obey the laws of physics.

Christ, what terrible, terrible reporting.

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Date: 15/04/2014 21:36:13
From: OCDC
ID: 518746
Subject: re: LHC tetraquark? (Non-holiday)

sibeen said:

OCDC said:
Right now, scientists still aren’t 100% sure this type of tetraquark would obey the laws of physics.
Christ, what terrible, terrible reporting.
That’s why I went to the primary source :-)

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Date: 15/04/2014 21:50:53
From: JudgeMental
ID: 518748
Subject: re: LHC tetraquark? (Non-holiday)

Christ, what terrible, terrible reporting.

scotty will be spinning…

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Date: 15/04/2014 23:18:16
From: dv
ID: 518766
Subject: re: LHC tetraquark? (Non-holiday)

Nice Subject line

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Date: 16/04/2014 03:15:38
From: Wocky
ID: 518860
Subject: re: LHC tetraquark? (Non-holiday)

See also this thread: http://tokyo3.org/forums/holiday/topics/4435/

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