However, this claim was retracted in 2012. In 2011, the OPERA experiment at Gran Sasso in the Italian Apennines reported that neutrinos sent from CERN in Geneva, Switzerland, arrived 60 nanoseconds earlier than expected. Except you can’t send a photon beam through rock, so you’d have to calculate the photon arrival time. Needless to say, they don’t mesh very well with what we know about the workings of the universe. If neutrinos were tachyons, they would arrive at the detector before a photon beam would. Tachyons are hypothetical particles that always travel faster than light. This is in contrast to slower, 'normal' particles, which cannot go faster than this limit. At light speed the particle's mass would be zero, so that is the lower limit of its speed. Neutrinos have very weak interactions with matter, so physicists routinely produce beams of them at accelerators and send them through miles of earth to large underground detectors to study their properties. Used in the case of a tachyon, it means that the mass of the particle only exists if it is travelling at super-light speeds. P.S - Tachyons Are ‘particles with velocity greater than c ( Speed of light)’ Well now. Or one might guess that tachyons should be electrically neutral, like neutrinos. Answer (1 of 3): Looks Like We maybe close to finding tachyons. If tachyons were electrically charged, they could produce Cherenkov radiation in empty space. If an electrically charged particle moves faster than the speed of light in a given medium (which is allowed by special relativity), it makes the optical analog of a sonic boom, a cone of light called Cherenkov radiation. To answer your question, we have to ask: What kind of particle might be a tachyon? We also have to guess how tachyons would behave, since all known particle interactions obey the laws of special relativity. How particles are detected depends on properties other than their velocity. And because the existence of a tachyon is inconsistent with Einstein’s remarkably successful theory, a claim of tachyon detection would require extraordinary evidence. Normally, events only depend on what happened in the past, but aspects of Einstein’s theory imply that some observers would see a tachyon detected before it’s produced. The existence of tachyons can lead to “time travel” paradoxes. They are particles that infuse physical matter with spiritual light. In Einstein’s theory of special relativity, only massless particles like the photon travel at the speed of light all other particles travel slower. Tachyons are subatomic particles that travel faster than light. Tachyons are hypothetical particles that travel faster than the speed of light in a vacuum.
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