Reply Thu 7 Apr, 2011 07:55 pm
Physics community buzzing over possible new particle
by Kate Melville

Experiments at Fermilab's soon-to-be-mothballed Tevatron particle accelerator in the United States have produced collision outcomes that indicate the existence of a new, unknown particle that is not predicted by the fundamental laws of physics. The findings have been posted to Arxiv and have been submitted for publication in the journal Physical Review Letters.
http://www.scienceagogo.com/news/20110307202450data_trunc_sys.shtml

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Type: Discussion • Score: 3 • Views: 727 • Replies: 8
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Setanta
 
  1  
Reply Fri 8 Apr, 2011 03:50 am
Interesting, EB, thanks . . .
0 Replies
 
rosborne979
 
  1  
Reply Fri 8 Apr, 2011 06:32 am
@edgarblythe,
Quote:
"When you look at the data it's not some disagreement with the Standard Model, it's a nicely formed bump in the distribution that looks really like the kind of bump you'd get if a new particle was being exchanged in this process," said Fermilab's Dan Hooper. "There's a 0.1 percent chance that this is a statistical fluke. Other than that possibility that lingers, this is the most exciting new physics we've learned about in my lifetime."

Sounds interesting. Just think what the big collider will turn up if they ever get it up to speed. Science takes too long, I want instant gratification. I'm used to movies, where whole interplanetary wars can be fought in 2hrs.
Setanta
 
  1  
Reply Fri 8 Apr, 2011 06:52 am
@rosborne979,
Quote:
I'm used to movies, where whole interplanetary wars can be fought in 2hrs.


While at the same time upholding truth, justice and the American way.
0 Replies
 
edgarblythe
 
  1  
Reply Fri 8 Apr, 2011 11:59 am
I want a whole mess of articles. When they find some, I'm going to fill up a tub with particles and just kind of sqoosh around in them. I sure would like that.
0 Replies
 
edgarblythe
 
  1  
Reply Sat 9 Apr, 2011 06:54 pm
"But if it isn't something that can be washed away through more refined data," Greene says, "this would be a huge revolution."

So, What Is It?

As for what the particle might be, scientists are still speculating.

One possibility is that the particle may be evidence of a new force of nature, one that operates in only the shortest of distances between subatomic particles in individual atoms. For physicists, that's exciting news.

"We have spent many, many years investigating the known forces, and we understand them very well," Greene says. Those known forces are things like gravity, electromagnetism and the strong and weak nuclear forces that govern the motion of an atom.

But this new force, Greene says, "would suggest other processes that so far we have not yet seen."

A Collider's Last Crash

It's no accident those forces — if they exist — are still undiscovered. They're "hidden," Greene says, and it takes a massive particle collider like Fermilab's Tevatron to ferret them out.

The collider works by running subatomic particles along a 4-mile-long circular track and slamming them together at speeds very near the speed of light.

It's in the wreckage of those collisions, Greene says, that scientists "probe matter under the most extreme circumstances to try to reveal things we couldn't find in everyday life."

But the Tevatron — the machine that produces those collisions — is expected to close in September due to federal budget cuts. That gives researchers only a few months to work on replicating their results. But Greene isn't optimistic a new discovery there would encourage officials to keep it open.

At the Tevatron, he says, "we've learned about particles that make up the tiniest bits of the universe, quarks. We've learned about forces of nature. We've pushed technology to its limits in building these very machines.

"This really has been a force in American science, and it is a profound loss for it to be shut down."

Replicating The Bump

Meanwhile, reaction to Fermilab's results has been greeted with a healthy dose of skepticism from the physics community.

Those results challenge what's known as the Standard Model, a mathematical theory Greene says has been able to describe "every single result from any experiment from any accelerator around the world for decades.

"To now see that perhaps it's not right is exciting," he says, "but also has to be viewed with a very critical eye."

That will mean replicating Fermilab's results not only at the Tevatron, but also at other colliders around the world, such as the Large Hadron Collider in Geneva.

"That machine would really have the possibility to either show that it's right or wipe it out and show that it's wrong."

So if the bump is proved? Greene, a string theorist, would have a lot of new work to do. String theory, he says, relies on the idea that there are unknown forces of nature in the universe.

"I've spent my entire career imagining this very day," he says. "To have something pointing in a direction beyond the status quo? That would be incredibly exciting."
Related NPR Stories
0 Replies
 
dadpad
 
  1  
Reply Sat 9 Apr, 2011 09:47 pm
Quote:
But the Tevatron — the machine that produces those collisions — is expected to close in September due to federal budget cuts. That gives researchers only a few months to work on replicating their results. But Greene isn't optimistic a new discovery there would encourage officials to keep it open.


How fortuitous that an exciting new development should happen just in the nick of time.
rosborne979
 
  1  
Reply Sun 10 Apr, 2011 04:04 am
@dadpad,
That thought crossed my mind as well.
0 Replies
 
edgarblythe
 
  2  
Reply Sun 10 Apr, 2011 06:27 am
If true, those guys will be disgraced forever, when caught.
0 Replies
 
 

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