Naslov
Measurement of the neutrino velocity with the OPERA detector in the CNGS beam

Autori
Adam, T. ; ... ; Jakovčić, Krešimir ; ... ; Kliček, Budimir ; ... ; Ljubičić, Ante ; ... ; Stipčević, Mario ; ... ; Zghiche, A.

Kolaboracija
OPERA Collaboration

Izvornik
The Journal of high energy physics (1126-6708) 10 (2012); 93, 37

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
neutrino detectors and telescopes

Sažetak
The OPERA neutrino experiment at the underground Gran Sasso Laboratory has measured the velocity of neutrinos from the CERN CNGS beam over a baseline of about 730 km. The measurement is based on data taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of the CNGS timing system and of the OPERA detector, as well as a high precision geodesy campaign for the measurement of the neutrino baseline, allowed reaching comparable systematic and statistical accuracies. An arrival time of CNGS muon neutrinos with respect to the one computed assuming the speed of light in vacuum of (6:5 _ 7:4 (stat:)+8:3_8:0(sys:)) ns was measured corresponding to a relative di_erence of the muon neutrino velocity with respect to the speed of light (v _ c)=c = (2:7 _ 3:1 (stat:) +3:4 _3:3 (sys:)) _ 10_6. The above result, obtained by comparingthe time distributions of neutrino interactions and of protons hitting the CNGS target in10.5 _s long extractions, was con_rmed by a test performed at the end of 2011 using a short bunch beam allowing to measure the neutrino time of ight at the single interaction level.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA