Abstract
The OPERA collaboration claims that muon neutrinos with a mean energy of 17.5 GeV travel 730 km from CERN to the Gran Sasso at a speed exceeding that of light by about or 25 ppm. However, we show that superluminal neutrinos may lose energy rapidly via the bremsstrahlung of electron-positron pairs (). For the claimed superluminal velocity and at the stated mean energy, we find that most of the neutrinos would have suffered several pair emissions en route, causing the beam to be depleted of higher energy neutrinos. This presents a significant challenge to the superluminal interpretation of the OPERA data. Furthermore, we appeal to Super-Kamiokande and IceCube data to establish strong new limits on the superluminal propagation of high-energy neutrinos.
- Received 4 October 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.181803
© 2011 American Physical Society
Synopsis
Not So Fast
Published 27 October 2011
Most attempts to explain the recent data suggesting that neutrinos travel faster than the speed of light aren’t consistent with the Cherenkov-like radiation these particles would be expected to emit.
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