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OPERA experiment reports anomaly in flight time of neutrinos from CERN to Gran Sasso

Date:
February 23, 2012
Source:
CERN
Summary:
The OPERA collaboration has informed its funding agencies and host laboratories that it has identified two possible effects that could have an influence on its neutrino timing measurement. These both require further tests with a short pulsed beam. If confirmed, one would increase the size of the measured effect, the other would diminish it.

The OPERA collaboration has informed its funding agencies and host laboratories that it has identified two possible effects that could have an influence on its neutrino timing measurement. These both require further tests with a short pulsed beam. If confirmed, one would increase the size of the measured effect, the other would diminish it.

The first possible effect concerns an oscillator used to provide the time stamps for GPS synchronizations. It could have led to an overestimate of the neutrino's time of flight.

The second concerns the optical fibre connector that brings the external GPS signal to the OPERA master clock, which may not have been functioning correctly when the measurements were taken. If this is the case, it could have led to an underestimate of the time of flight of the neutrinos.

The potential extent of these two effects is being studied by the OPERA collaboration. New measurements with short pulsed beams are scheduled for May.


Story Source:

The above story is based on materials provided by CERN. Note: Materials may be edited for content and length.


Cite This Page:

CERN. "OPERA experiment reports anomaly in flight time of neutrinos from CERN to Gran Sasso." ScienceDaily. ScienceDaily, 23 February 2012. <www.sciencedaily.com/releases/2012/02/120223081231.htm>.
CERN. (2012, February 23). OPERA experiment reports anomaly in flight time of neutrinos from CERN to Gran Sasso. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2012/02/120223081231.htm
CERN. "OPERA experiment reports anomaly in flight time of neutrinos from CERN to Gran Sasso." ScienceDaily. www.sciencedaily.com/releases/2012/02/120223081231.htm (accessed July 23, 2014).

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