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26 April 2024

» arxiv » 1203.3433

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Measurement of the neutrino velocity with the ICARUS detector at the CNGS beam
M. Antonello ; P. Aprili ; B. Baibussinov ; M. Baldo Ceolin ; P. Benetti ; E. Calligarich ; N. Canci ; F. Carbonara ; S. Centro ; A. Cesana ; K. Cieslik ; D. B. Cline ; A.G. Cocco ; A. Dabrowska ; D. Dequal ; A. Dermenev ; R. Dolfini ; C. Farnese ; A. Fava ; A. Ferrari ; G. Fiorillo ; D. Gibin ; A. Gigli Berzolari ; S. Gninenko ; A. Guglielmi ; M. Haranczyk ; J. Holeczek ; A. Ivashkin ; J. Kisiel ; I. Kochanek ; J. Lagoda ; S. Mania ; G. Mannocchi ; A. Menegolli ; G. Meng ; C. Montanari ; S. Otwinowski ; L. Periale ; A. Piazzoli ; P. Picchi ; F. Pietropaolo ; P. Plonski ; A. Rappoldi ; G.L. Raselli ; M. Rossella ; C. Rubbia ; P. Sala ; E. Scantamburlo ; A. Scaramelli ; E. Segreto ; F. Sergiampietri ; D. Stefan ; J. Stepaniak ; R. Sulej ; M. Szarska ; M. Terrani ; F. Varanini ; S. Ventura ; C. Vignoli ; H. Wang ; X. Yang ; A. Zalewska ; K. Zaremba ;
Date:	15 Mar 2012
Abstract:	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.
Source:	arXiv, 1203.3433
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