2012/03/29 by M. Antonello, P. Aprili, B. Baiboussinov +75 · 1 voice · 79 citations
Physics and Astronomy · #Astrophysics #Beam (structure) #Dark Matter and Cosmic Phenomena #Detector #Event (particle physics) #ICARUS #Large Hadron Collider #Measurements of neutrino speed #Neutrino #Neutrino Physics Research #Neutrino detector #Neutrino oscillation #Nuclear physics #Optics #Particle physics #Particle physics theoretical and experimental studies #Physics #Solar neutrino #hep-ex #physics.ins-det
paper · pdf · open access · doi:10.1016/j.physletb.2012.05.033
published in Physics Letters B 713(1), 17-22 (Elsevier BV) · 13 pages, 1 table, 3 figures
arxiv created 2012/03/29 · openalex publication_date 2012/05/17 · arxiv updated 2015/06/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
At the end of the 2011 run, the CERN CNGS neutrino beam has been briefly operated in lower intensity mode with ∼1012p.o.t./pulse and with a proton beam structure made of four LHC-like extractions, each with a narrow width of ∼3ns, separated by 524 ns. This very tightly bunched beam allowed a very accurate time-of-flight measurement of neutrinos from CERN to LNGS on an event-by-event basis. The ICARUS T600 detector (CNGS2) has collected 7 beam-associated events, consistent with the CNGS collected neutrino flux of 2.2×1016p.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 δt=0.3±4.9(stat.)±9.0(syst.)ns is compatible with the simultaneous arrival of all events with speed equal to that of light. This is in a striking difference with the reported result of OPERA (OPERA Collaboration, 2011) [1] claiming that high energy neutrinos from CERN arrive at LNGS ∼60ns earlier than expected from luminal speed.