Measurement of the velocity of neutrinos from the CNGS beam with the large volume detector

Agafonova¹, N. YU.; Aglietta², M.; Antonioli³, P; Ashikhmin¹, V. V.; BarI³, G.; Bertoni², R.; Bressan4,5, E.; Bruno6, G.; Dadykin¹, V. L.; Fulgione, W; Galeotti, P.; Garbini, M; Ghia, P. L.; Giusti, P; Kemp, E; Malgin, 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. C.; Vigorito7,21, C.; Yakushev¹, V. F.; Zichichi, A.; Razeto, A

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Revista Boliviana de Física

On-line version ISSN 1562-3823

Abstract

AGAFONOVA¹, N. YU. et al. Measurement of the velocity of neutrinos from the CNGS beam with the large volume detector. Revista Boliviana de Física [online]. 2016, vol.28, n.28, pp.16-21. ISSN 1562-3823.

Abstract We report the measurement of the time-of-flight of ~ 17 GeV 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: (at 99% C.L.). This value is an order of magnitude lower than previous direct measurements.

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