• Quick note - the problem with Youtube videos not embedding on the forum appears to have been fixed, thanks to ZiprHead. If you do still see problems let me know.

Merged Puzzling results from CERN

Mikemcc said:
Some initial results from the re-runs have been released:

http://news.sciencemag.org/scienceinsider/2011/11/faster-than-light-neutrinos-opera.html

There's still some issues, but it is increasingly looking like a 'oh s***!' moment in experimental physics! :D
Click to expand...

Well, it looks like they addressed precisely the issue I brought up in this thread - that the pulses were much longer than the claimed time offset, so they should use shorter pulses instead. They did so, but they still see the offset... which suggests that I was probably incorrect about where the error is (and yes, I'd still bet at very high odds that it's an error).

At this point some other group needs to try to replicate this. There's another experiment in Gran Sasso, called DAMA, that for years has been producing data that is inconsistent with several other experiments around the world. To this day, no one knows why - most people would probably bet that it's just wrong.
 
sol invictus said:
Well, it looks like they addressed precisely the issue I brought up in this thread - that the pulses were much longer than the claimed time offset, so they should use shorter pulses instead. They did so, but they still see the offset... which suggests that I was probably incorrect about where the error is (and yes, I'd still bet at very high odds that it's an error).
Click to expand...
I was just reading about the rerun in "The Scotsman", which highlighted this criticism- which sent me scurrying here to see what you made of it.
At this point some other group needs to try to replicate this. There's another experiment in Gran Sasso, called DAMA, that for years has been producing data that is inconsistent with several other experiments around the world. To this day, no one knows why - most people would probably bet that it's just wrong.
Click to expand...
The newspaper article mentioned a group in Japan.
 
sol invictus said:
At this point some other group needs to try to replicate this. There's another experiment in Gran Sasso, called DAMA, that for years has been producing data that is inconsistent with several other experiments around the world. To this day, no one knows why - most people would probably bet that it's just wrong.
Click to expand...

This is precisely my view on the matter. Until other research groups at other facilities are able to attempt to independently replicate the phenomenon, we can't really draw any conclusions.

So the waiting game continues...
 
MattusMaximus said:
This is precisely my view on the matter. Until other research groups at other facilities are able to attempt to independently replicate the phenomenon, we can't really draw any conclusions.

So the waiting game continues...
Click to expand...

I read somewhere that a similar result was produced by a U.S. laboratory/particle accelerator but that they were unsure about the margins of error or something like that.
 
Well, scientists in Italy are saying it ain't so.
An international team of scientists in Italy studying the same neutrino particles colleagues say appear to have travelled faster than light rejected the startling finding this weekend, saying their tests had shown it must be wrong.
<snip>
In a paper posted Saturday on the same website as the OPERA results, arxiv.org/abs/1110.3763v2, the ICARUS team says their findings "refute a superluminal (faster than light) interpretation of the OPERA result."
Click to expand...
I guess the experiments trying to replicate the OPERA results will decide who's right.
 
FattyCatty said:
Well, scientists in Italy are saying it ain't so.I guess the experiments trying to replicate the OPERA results will decide who's right.
Click to expand...
The experiments are in and the interpretations are what's in question. The margins of error are such that the neutrino speed is safely under that of light in a vacuum. Of course some of those supposedly high power physicicsts seem pretty ignorant about what is measured when they say they are measuring time.
 
edd said:
That experiment is just showing that the neutrinos aren't showing any Cohen-Glashow emission, which we already knew wasn't happening from OPERA. So I don't think it adds anything substantial, does it?
Click to expand...
I don't know, I was just putting out the information for those with knowledge of the subject. I thought the dueling acronyms were kind of cute.
 
BenBurch said:
OK, if Neutrinos are superluminal, why is there no Cherenkov radiation?
Click to expand...

If the laws of kinematics are wrong enough that high-energy neutrinos can go faster than light, but that 10 MeV neutrinos stay near c and there's no speed difference between 20 GeV and 50 GeV neutrinos ... well, you can imagine that the laws are also wrong in a way that invalidates the Cohen-Glashow assumptions.

If the baby has been thrown out, maybe the bathwater is gone too. :)

(C'mon, MINOS, when do we get an independent measurement?)
 
Is it just a coincidence that the super-luminal neutrinos appear to be traveling as much faster than c in the Earth's gravity well as photons appear to travel slower?
 
You must log in or register to reply here.

Back
Top Bottom