We report the measurement of the time of flight of ∼17 GeV νμ 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: -3.8×10-6<(vν-c)/c<3.1×10-6 (at 99% C.L.). This value is an order of magnitude lower than previous direct measurements.
Measurement of the Velocity of Neutrinos from the CNGS Beam with the Large Volume Detector / N. Yu. Agafonova;M. Aglietta;P. Antonioli;V. V. Ashikhmin;G. Bari;R. Bertoni;E. Bressan;G. Bruno;V. L. Dadykin;W. Fulgione;P. Galeotti;M. Garbini;P. L. Ghia;P. Giusti;E. Kemp;A. S. Mal’gin;B. Miguez;A. Molinario;R. Persiani;I. A. Pless;V. G. Ryasny;O. G. Ryazhskaya;O. Saavedra;G. Sartorelli;I. R. Shakyrianova;M. Selvi;G. C. Trinchero;C. Vigorito;V. F. Yakushev;A. Zichichi;A. Razeto. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 109:(2012), pp. 070801-070801-5. [10.1103/PhysRevLett.109.070801]
Measurement of the Velocity of Neutrinos from the CNGS Beam with the Large Volume Detector
ANTONIOLI, PIETRO;BRESSAN, ELISA;GARBINI, MARCO;GIUSTI, PAOLO;PERSIANI, RINO;SARTORELLI, GABRIELLA;SELVI, MARCO;ZICHICHI, ANTONINO;
2012
Abstract
We report the measurement of the time of flight of ∼17 GeV νμ 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: -3.8×10-6<(vν-c)/c<3.1×10-6 (at 99% C.L.). This value is an order of magnitude lower than previous direct measurements.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
