Measurement of the velocity of neutrinos from the CNGS beam with the Large Volume Detector
Agafonova, N. Yu. · Aglietta, M. · Antonioli, P. · Ashikhmin, V. V. · Bari, G. · Bertoni, R. · Bressan, E. · Bruno, G. · Dadykin, V. L. · Fulgione, W. · Galeotti, P. · Garbini, M. · Ghia, P. L. · Giusti, P. · Kemp, E. · Mal'gin, A. S. · Miguez, B. · Molinario, A. · Persiani, R. · Pless, I. A. · Ryasny, V. G. · Ryazhskaya, O. G. · Saavedra, O. · Sartorelli, G. · Shakyrianova, I. R. · Selvi, M. · Trinchero, G. · Vigorito, C. · Yakushev, V. F. · Zichichi, A. · Razeto, A.
Original · EN
We report the measurement of the time-of-flight of 17 GeV muon neutrinos on the CNGS baseline (732 km) with the Large Volume Detector (LVD) at the Gran Sasso Laboratory. The CERN-SPS accelerator has been operated from May 10th to May 24th 2012, with a tightly bunched-beam structure to allow the velocity of neutrinos to be accurately measured on an event-by-event basis. LVD has detected 48 neutrino events, associated to the beam, with a high absolute time accuracy. These events allow to establish the following limit on the difference between the neutrino speed and the light velocity: -3.8 x 10-6 < (v-c)/c < 3.1 x 10-6 (at 99% C.L.). This value is an order of magnitude lower than previous direct measurements.
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