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Finding puts brakes on faster-than-light neutrinos
Nature News ^ | 20 October 2011 | Eugenie Samuel Reich

Posted on 10/21/2011 10:47:39 AM PDT by neverdem

An independent experiment confirms that subatomic particles have wrong energy spectrum for superluminal travel.

The claim that neutrinos can travel faster than light has been given a knock by an independent experiment.

On 17 October, the Imaging Cosmic and Rare Underground Signals (ICARUS) collaboration submitted a paper1 to the preprint server arXiv.org, in which it offered a rebuttal of claims2 to have clocked subatomic particles called neutrinos travelling faster than the speed of light. The original results were published on 22 September by the Oscillation Project with Emulsion-Tracking Apparatus (OPERA) experiment.

Both experiments are based at Gran Sasso National Laboratory near L'Aquila, Italy, and detect neutrinos coming in a beam from CERN, Europe's high-energy particle physics laboratory near Geneva in Switzerland, about 730 kilometres away. Unlike OPERA, ICARUS does not measure the neutrinos' speed directly. Instead, it has shown that the energy spectrum of the neutrinos does not exhibit an effect predicted last month3 by Andrew Cohen and Sheldon Glashow, theoretical physicists at Boston University in Massachusetts.

If the Cohen–Glashow effect is a valid prediction, "neutrinos are not superluminal," says Sandro Centro, a physicist at the University of Padua in Italy, deputy spokesman for ICARUS and a co-author of the latest paper.

Cohen says that an energy spectrum provided by OPERA showed the same inconsistency, and that the spectrum from ICARUS has added to the problem. "There's always value to having things checked independently," says Cohen. "I think it's great ICARUS has done this so quickly."

Too much momentum

The Cohen–Glashow effect is an extension of another phenomenon, well known to physicists. The speed of light travelling through materials such as water is lower than that in a vacuum, and charged particles such as electrons are able to exceed this lower speed when travelling through the medium. When they do...

(Excerpt) Read more at nature.com ...


TOPICS: Culture/Society; News/Current Events; Testing
KEYWORDS: cerenkovradiation; cohenglashoweffect; icarus; light; neutrinos; opera; physics; speedoflight; stringtheory

1 posted on 10/21/2011 10:47:42 AM PDT by neverdem
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To: neverdem

Braking News?...........


2 posted on 10/21/2011 10:48:26 AM PDT by Red Badger (Obama's number one economics advisor must be a Magic Eight Ball.................)
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To: Red Badger

ICARUS crashed when the fat lady sang at the OPERA.


3 posted on 10/21/2011 10:50:31 AM PDT by jessduntno (Obama shanks. America tanks.)
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To: Red Badger

You should be PUNished for that comment.


4 posted on 10/21/2011 10:50:49 AM PDT by Sudetenland (There can be no freedom without God--What man gives, man can take away.)
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To: neverdem

“Whew.”

—Einstein


5 posted on 10/21/2011 10:52:53 AM PDT by Pearls Before Swine
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To: neverdem

Who knew?


6 posted on 10/21/2011 10:56:42 AM PDT by broken_arrow1 (I regret that I have but one life to give for my country - Nathan Hale "Patriot")
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Please bump the FReepathon thread
Support FR today!

7 posted on 10/21/2011 10:59:57 AM PDT by Darksheare (You will never defeat Bok Choy!)
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To: neverdem
"We don't allow no faster-than-light neutrinos in here," says the bartender.

A neutrino walks into a bar.

8 posted on 10/21/2011 11:04:13 AM PDT by pabianice (")
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To: neverdem

I’m confused. I thought the science was settled.


9 posted on 10/21/2011 11:05:23 AM PDT by Drill Thrawl (0 - 537 They ALL must go.)
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To: neverdem

Aiieee! It’s “traveling,” not “travelling.” Can’t physicists spell?


10 posted on 10/21/2011 11:06:40 AM PDT by pabianice (")
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To: pabianice

Physicists don’t do spells, It only looks like magic.


11 posted on 10/21/2011 11:09:43 AM PDT by Drill Thrawl (0 - 537 They ALL must go.)
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To: pabianice

An aggressive litigation agency with a software house attached based in Redmond, WA decide “it’s ‘traveling’, not ‘travelling”,” but not all of us bow to Microsoft’s spell checker as the ultimate arbiter of English orthography. Many of us still defend the older convention, that used to apply almost universally on both sides of the Atlantic, that terminal letters are doubled when -ing or -ed is added in cases where the addition of an e would lengthen the vowel before the single consonant.

There are adequate testimonies to the use of travelling as the correct spelling for the present participle of the verb to travel, both online and in printed literature, that your complaint is completely invalid.


12 posted on 10/21/2011 2:00:10 PM PDT by The_Reader_David (And when they behead your own people in the wars which are to come, then you will know. . .)
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To: pabianice

Both “traveling” and “travelling” are correct spellings. I believe Nature is a British periodical, and the later is actually the preferred spelling there.


13 posted on 10/21/2011 2:48:45 PM PDT by Boogieman
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To: Boogieman; pabianice
1. It's spelling not speling.

2. 'Travelling' agrees with the double-consonant rule before 'ing'.

3. 'travelling': 178 million hits, 'traveling': 280 million. Same order of magnitude.

14 posted on 10/21/2011 3:03:34 PM PDT by wideminded
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To: Red Badger

Lighten up.


15 posted on 10/21/2011 3:14:41 PM PDT by Mr. Lucky
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To: El Gato; Ernest_at_the_Beach; Robert A. Cook, PE; lepton; LadyDoc; jb6; tiamat; PGalt; Dianna; ...
Space Weather Forecasters Get Serious

Could a probiotic be used to treat inflammatory bowel disease? (role of iron in IBS)

IQ Is Not Fixed in the Teenage Brain

IQ 'can change in teenage years' BBC's version

FReepmail me if you want on or off my health and science ping list.

16 posted on 10/21/2011 4:02:40 PM PDT by neverdem (Xin loi minh oi)
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To: neverdem

So, this experiment disagrees with another theoretical analysis. Why do they claim it disagrees with another experiment, it’s confusing.


17 posted on 10/21/2011 4:35:56 PM PDT by MetaThought
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To: AdmSmith; bvw; callisto; ckilmer; dandelion; ganeshpuri89; gobucks; KevinDavis; Las Vegas Dave; ...

Thanks neverdem. They're only half as fast as the oldtrinos. I just hope know one makes a count of how many times I've used that joke.



· List topics · post a topic · subscribe · Google ·

18 posted on 10/21/2011 4:58:43 PM PDT by SunkenCiv (It's never a bad time to FReep this link -- https://secure.freerepublic.com/donate/)
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To: neverdem

Shoot! I had the neutrinos in my Phantasy Physics League this week.


19 posted on 10/22/2011 8:23:11 AM PDT by Pharmboy (Democrats lie because they HAVE to...)
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To: neverdem
671 million. It’s not just a good idea. It’s the law.
20 posted on 10/22/2011 8:32:42 AM PDT by RichInOC (Sarah Palin is at war with the left. Most Freepers are just playing the video game.)
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To: neverdem
This has ruined my life.

I only wanted ONE THING.

Faster-than-light neutrinos.

And I am denied.

21 posted on 10/22/2011 8:35:08 AM PDT by Lazamataz (When I see pictures or videos of the Occupation, all that I see is an ocean of mostly white faces.)
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To: MetaThought

Here we go again ... Dueling Hypotheses at High Noon !!!

One guy claims to measure the speed of neutrinos traveling about 100 kilometers with accuracy resembling .00000001% of C. He then speculates that the results suggest they exceeded C by a significant, perhaps even meaningful amount which seems to overturn Physics As We Know It. Oh, my ! Whatever will we DO ?

Another guy comes along and points out that, while he wasn’t actually trying to clock the neutrinos ( within the same experimental regime ) he DID somehow manage to characterize them accurately enough ( as they went zipping by ) to speculate that they failed to adhere to the speculations of some OTHER guys — who weren’t even there — but STILL think they know what a superluminal neutrino MUST look and act like.

1st guy: Man, look at that superluminal neutrino’s ET ! He got here before he even left the Line ! All RIGHT !!!

2d guy: Man, that ain’t no superluminal neutrino — if he DID try to go that fast, my buddy over there thinks his wheels would fall off, at least !!!

1st guy: But ... but ... I got him clocked on the scoreboard over there ! I got him goin’ over the line in my camera, Dude !!!

2d guy: Sorry, man. Must have been some other dude’s ride ‘cause your guy’s wheels must have fallen off before you even clocked him.

And so it goes ...

One Man’s Opinion

21stCenturion


22 posted on 10/23/2011 10:41:48 AM PDT by 21stCenturion ("It's the Judges, Stupid !")
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To: 21stCenturion

Well they did another “better” test and STILL found FTL Neutrinos.

Ping Pong anyone.


23 posted on 11/18/2011 8:56:55 PM PST by TomasUSMC ( FIGHT LIKE WW2, FINISH LIKE WW2. FIGHT LIKE NAM, FINISH LIKE NAM)
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To: neverdem

Here is a Special Relativity Simulation:

http://www.youtube.com/watch?v=IgAII_crHHc


24 posted on 02/22/2012 4:33:43 PM PST by 2harddrive
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