[ExI] Faster than light??
scerir
scerir at alice.it
Fri Sep 23 06:11:08 UTC 2011
CERN reports that in one of their massive and extremely expensive experiments called
"Opera" they found evidence that Neutrinos travel faster than light! There has been a
wacky theory for some years that Neutrinos do that but almost nobody believed it and until
now there was zero evidence of it. It's still hard for me to believe and I have a hunch it
will turn out to be a mistake, but then again this is CERN we're talking about and they're
as good as it gets. They're going to publish all the data tomorrow and hold a press
conference.
http://online.wsj.com/article/AP58b5aed0a77c45ddb163d90951b36b35.html
http://www.reuters.com/article/2011/09/22/science-light-idUSL5E7KM4CW20110922
http://en.wikipedia.org/wiki/OPERA_experiment
John K Clark
#
Authors: _OPERA_ (http://arxiv.org/find/hep-ex/1/au:+OPERA/0/1/0/all/0/1)
Subjects: High Energy Physics - Experiment (hep-ex)
The OPERA neutrino experiment at the underground Gran Sasso Laboratory has
measured the velocity of neutrinos from the CERN CNGS beam over a baseline
of about 730 km with much higher accuracy than previous studies conducted
with accelerator neutrinos. The measurement is based on high-statistics data
taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of the
CNGS timing system and of the OPERA detector, as well as a high precision
geodesy campaign for the measurement of the neutrino baseline, allowed
reaching comparable systematic and statistical accuracies. An early arrival
time of CNGS muon neutrinos with respect to the one computed assuming the
speed of light in vacuum of (60.7 \pm 6.9 (stat.) \pm 7.4 (sys.)) ns was
measured. This anomaly corresponds to a relative difference of the muon neutrino
velocity with respect to the speed of light (v-c)/c = (2.48 \pm 0.28
(stat.) \pm 0.30 (sys.)) \times 10-5.
_http://arxiv.org/ftp/arxiv/papers/1109/1109.4897.pdf_
(http://arxiv.org/ftp/arxiv/papers/1109/1109.4897.pdf)
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