High Energy Physics Journal Club
Report on: New Constraints on Neutrino Velocities
by Amol Dighe
Thursday, October 13, 2011
from
to
(Asia/Kolkata)
at Colaba Campus ( AG-69 )
at Colaba Campus ( AG-69 )
Description |
Authors: Andrew G. Cohen, Sheldon L. Glashow Abstract: The OPERA collaboration has claimed that muon neutrinos with mean energy of 17.5 GeV travel 730 km from CERN to the Gran Sasso at a speed exceeding that of light by about 7.5 km/s or 25 ppm. However, we show that such superluminal neutrinos would lose energy rapidly via the bremsstrahlung of electron-positron pairs ($\nu\rightarrow \nu+e^-+e^+$). For the claimed superluminal neutrino velocity and at the stated mean neutrino 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. Thus we refute the superluminal interpretation of the OPERA result. Furthermore, we appeal to Super-Kamiokande and IceCube data to establish strong new limits on the superluminal propagation of high-energy neutrinos. |
Participants | Arka Banerjee; Debasish Banerjee; Raju Bathija; Rajeev Bhalerao; Biplob Bhattacharjee; Sudhansu Biswal; Saumen Datta; Amol Dighe; Rajiv V. Gavai; Diptimoy Ghosh; Monoranjan Guchait; Sourendu Gupta; Vinod Joshi; Sridhar K.; Nikhil Karthik; Padmanath M.; Nilmani Mathur; Shiraz Minwalla; Subroto Pal; Sreerup Raychaudhuri; Sayantan Sarma; Anurag Tripathi |
Material: |