2012/08/15 by N. Yu. Agafonova, M. Aglietta, P. Antonioli +29
Physics and Astronomy · #Astrophysics #Astrophysics and Cosmic Phenomena #Beam (structure) #Detector #Event (particle physics) #Neutrino #Neutrino Physics Research #Neutrino detector #Neutrino oscillation #Nuclear physics #Optics #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #hep-ex
paper · pdf · doi:10.1103/physrevlett.109.070801
published as PRL 109, 070801 (2012)
openalex publication_date 2012/08/15 · arxiv created 2012/08/23 · arxiv updated 2015/03/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report the measurement of the time of flight of \ensuremath∼17 GeV \ensuremathν_\ensuremathμ 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 with the beam, with a high absolute time accuracy. These events allow us to establish the following limit on the difference between the neutrino speed and the light velocity: \ensuremath-3.8\ifmmode×\else\texttimes\fi10^\ensuremath-6<(v_\ensuremathν\ensuremath-c)/c<3.1\ifmmode×\else\texttimes\fi10^\ensuremath-6 (at 99% C.L.). This value is an order of magnitude lower than previous direct measurements.