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Cern today gone tomorro

Posted: Sun Mar 11, 2012 1:15 pm
by Cliff
Dear al(L)
I seem to be slowing down - what follows is probably old news but I haven't seen any mention of it on this chat forum yet (?).
According to "New Scientist - Special Issue" 3rd March. it seems possibe that the previous big news that neutrinos can travel faster than light may have been premature and incorrect.
It seems two eqipment problems have now been found related to equipment at the Italian Gran Grasso end, 730 Km from Cern.
1) A vertcal 8.3 KM fibre-optics cable appears to have been faulty.
2) A very accurate clock used in the experiment also appears to have been faulty and potentially not good enough to provide reliable reults.
Apparently OPERA intend to start rerunning the experiment in May with a repaired cable and new clock.
Thomas Weiller of Vaderbilt University, Tennessee, who linked the old super fast nutrino OPERA results to extra dimensions says :
" Nature does not give up her secrets easily and superluminal neutrinos may not be one of her secrets at all."
Best wishes from Cliff

Posted: Thu Mar 22, 2012 8:59 pm
by Cliff
Dear al(L)
"New Scientist" magazine 24th March in its article "Neutrinos reined in" that the ICARUS experiment has now measured how long it takes neutrinos to fly from Cern to Gran Sasso. ............"the verdict:neutrinos do obey Einstein's speed limit."
However, presumably the OPERA team wil be assessing neutrinos speed again to clarify things .
Best wishes from Cliff

Posted: Sat Mar 31, 2012 9:13 am
by brian livesey
The physicist who oversaw the OPERA experiments, Prof. Antonio Ereditato, has resigned from his post.
It seems that some of the Professor's team wanted him to resign. So far, the experimental errors have been put down to wrong timing or an optical fibre connection.
More tests will be carried out in May.