What is OPERA experiment?
The '''Oscillation Project with Emulsion-tRacking Apparatus''' ('''OPERA''') is a scientific experiment for detecting [[tau neutrino]]s from muon [[neutrino oscillation]]s.<ref name=op>{{cite web|url=http://operaweb.lngs.infn.it/|title=ABOUT OPERA|accessdate=2011-10-25|archive-date=2012-07-13|archive-url=https://archive.today/20120713232158/http://operaweb.lngs.infn.it/|url-status=dead}}</ref> The experiment is a joint effort between the [[CERN|European Centre for Nuclear Research]] (CERN) and the [[Laboratori Nazionali del Gran Sasso|Gran Sasso National Laboratory]] (LNGS). In September 2011, OPERA scientists said that they had seen [[neutrino]]s appear to travel faster than [[lightspeed|the speed of light]].<ref>{{cite web|url=http://news.sciencemag.org/sciencenow/2011/09/neutrinos-travel-faster-than-lig.html?ref=hp|title=Neutrinos Travel Faster Than Light, According to One Experiment|publisher=Science|date=2011-09-22|first=Adrian|last=Cho|accessdate=2011-10-25|archive-date=2011-11-06|archive-url=https://web.archive.org/web/20111106071650/http://news.sciencemag.org/sciencenow/2011/09/neutrinos-travel-faster-than-lig.html?ref=hp|url-status=dead}}</ref> However, the scientists later found problems in their equipment which had caused the anomaly. The neutrino time of flight was consistent with the speed of light.<ref>{{cite web|url=http://press.web.cern.ch/press-releases/2011/09/opera-experiment-reports-anomaly-flight-time-neutrinos-cern-gran-sasso|title=OPERA experiment reports anomaly in flight time of neutrinos from CERN to Gran Sasso|publisher=CERN|accessdate=2015-01-15|date=2012-06-08|archive-date=2013-04-05|archive-url=https://web.archive.org/web/20130405095950/http://press.web.cern.ch/press-releases/2011/09/opera-experiment-reports-anomaly-flight-time-neutrinos-cern-gran-sasso|url-status=dead}}</ref> ==Related pages== *[[OPERA neutrino anomaly]] == References == {{reflist}} {{physics-stub}} [[Category:Physics experiments]]