From Fermilab Today: “MINOS reports new measurement of neutrino velocity “

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Friday, June 8, 2012
Leah Hesla

Scientists from Fermilab’s MINOS experiment are reporting a new measurement of the velocity of the neutrino.

Scientists at the MINOS experiment measure neutrinos that travel 450 miles through the earth. They travel first through a detector at Fermilab and then through a second detector, pictured here, in a mine in Soudan, Minn. Photo: Fermilab

The neutrino, which is the lightest known particle, is expected to move so close to the speed of light that experiments use it as a point of comparison and expect any deviations to be extremely small.

The new MINOS measurement, presented yesterday by Fermilab’s Phil Adamson at the XXV International Conference on Neutrino Physics and Astrophysics in Kyoto, Japan (Neutrino 2012), uses seven years of data taken by the MINOS experiment. This extends an earlier published study by MINOS using a factor of 8.5 more data.

Most importantly, the new MINOS study significantly reduces the systematic errors of its earlier work with detailed measurements of the behavior of the experiment’s GPS timing system, improved understanding of the delays of electronic components at every stage of the MINOS detectors and the use of upgraded timing equipment, designed and implemented with the assistance of the National Institute of Science and Technology and the United States Naval Observatory.”

See the full article here.

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