Measurement of the neutrino velocity with the ICARUS detector at the CNGS beam

The CERN-SPS accelerator has been briefly operated in a new, lower intensity neutrino mode with ~10^12 p.o.t. /pulse and with a beam structure made of four LHC-like extractions, each with a narrow width of ~3 ns, separated by 524 ns. This very tightly bunched beam structure represents a substantial...

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Detalles Bibliográficos
Autores principales: Antonello, M., Aprili, P., Baibussinov, B., Ceolin, M.Baldo, Benetti, P., Calligarich, E., Canci, N., Carbonara, F., Centro, S., Cesana, A., Cieslik, K., Cline, D.B., Cocco, A.G., Dabrowska, A., Dequal, D., Dermenev, A., Dolfini, R., Farnese, C., Fava, A., Ferrari, A., Fiorillo, G., Gibin, D., Berzolari, A.Gigli, Gninenko, S., Guglielmi, A., Haranczyk, M., Holeczek, J., Ivashkin, A., Kisiel, J., Kochanek, I., Mania, S., Mannocchi, G., Menegolli, A., Meng, G., Montanari, C., Otwinowski, S., Periale, L., Piazzoli, A., Picchi, P., Pietropaolo, F., Plonski, P., Rappoldi, A., Raselli, G.L., Rossella, M., Rubbia, C., Sala, P., Scantamburlo, E., Scaramelli, A., Segreto, E., Sergiampietri, F., Stefan, D., Stepaniak, J., Sulej, R., Szarska, M., Terrani, M., Varanini, F., Ventura, S., Vignoli, C., Wang, H., Yang, X., Zalewska, A., Zaremba, K., Alvarez Sanchez, P., Serrano, J.
Lenguaje:eng
Publicado: 2012
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2012.05.033
http://cds.cern.ch/record/1432444
Descripción
Sumario:The CERN-SPS accelerator has been briefly operated in a new, lower intensity neutrino mode with ~10^12 p.o.t. /pulse and with a beam structure made of four LHC-like extractions, each with a narrow width of ~3 ns, separated by 524 ns. This very tightly bunched beam structure represents a substantial progress with respect to the ordinary operation of the CNGS beam, since it allows a very accurate time-of-flight measurement of neutrinos from CERN to LNGS on an event-to-event basis. The ICARUS T600 detector has collected 7 beam-associated events, consistent with the CNGS delivered neutrino flux of 2.2 10^16 p.o.t. and in agreement with the well known characteristics of neutrino events in the LAr-TPC. The time of flight difference between the speed of light and the arriving neutrino LAr-TPC events has been analysed. The result is compatible with the simultaneous arrival of all events with equal speed, the one of light. This is in a striking difference with the reported result of OPERA [1] that claimed that high energy neutrinos from CERN should arrive at LNGS about 60 ns earlier than expected from luminal speed.

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