Are Neutrinos Faster Than Light?

[ADeAngelis]

Smells bad, and inconsistent with SN1987A…
There had been a delay of ~3h between the neutrinos and the gammas in SN1987A (it had been explained by astrophysical reasons, though). If one however interprets it as physical, takes the distance of the SN (168000 ly) and rescales it to the distance between CERN and Gran Sasso, one would expect at GS a delay of

Dt ~ 10000 s * (700e3/(168000*3e7*3e8)) ~ 5 ps

which is 1 millimeter… It is true that the SN neutrinos where in the MeV, but it looks strange that something dramatic happens between the MeV and the GeV…

Alessandro De Angelis

PS – People had claimed and then withdrawn, in the case of the SN1987A, a neutrino detection 1 day before – and also speculated about neutrinos being tachions; this would make however 50 ps, still not enough…

 

[gvk]

Do you mean this
http://arxiv.org/ftp/arxiv/papers/1109/1109.4897.pdf?

 

[gvk]

DrChinese
"The speed of light in a vacuum of course is equal to the speed of a neutrino in a vacuum."

Today in 2011, not all physicists think so (the above is article from Gran Sasso National Laboratory which just appeared in ArXiv.org).

This is a serious attempt to crash our fundamental basis. My impression, there is some experimental miss-interpretation, but how big team of good physicists in respectable Lab can make such conclusion, this is out of my mind.

 

[jtbell]

DrChinese
"The speed of light in a vacuum of course is equal to the speed of a neutrino in a vacuum."

Today in 2011, not all physicists think so (the above is article from Gran Sasso National Laboratory which just appeared in ArXiv.org).

Note the date on Dr. Chinese's post.

Please confine further discussion of the OPERA results to the existing thread:

https://www.physicsforums.com/showthread.php?t=532620