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A few years ago there was a story about the Large Hadron Collider where a possible tachyon was supposedly observed. It was later shown it didn't occur yet the incident made me think. If a large experiment using extreme amounts of energy trying to duplicate some processes or events of the 'distant' past , would the intense amount of energy in this 'early' Universe experiment create a situation where the speed of light was different?? If a particle was observed emanating from this experiment and it seemed superluminal could this be due to a different speed of light measurement due to this phenomenon.

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marked as duplicate by Brandon Enright, Qmechanic Apr 11 at 10:27

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Are you talking about the OPERA neutrinos? That had absolutely nothing to do with the LHC (and as the answer explains, was shown to be a faulty measurement). –  David Z Apr 11 at 4:19
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To be very clear, OPERA involved CERN, but the LHC is not CERN. LHC is at CERN, but it is only one of a great many things at CERN. OPERA's neutrino beam was produced by a different accelerator (the SPS). –  dmckee Apr 11 at 4:30

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Unfortunately, this result was later found to be caused by faulty electronics, according to the CERN press release.

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