There physicist Raymond Davis built an experiment using 400,000 litres of cleaning fluid to
detect electron neutrinos, one of the three types of neutrino described by the standard model.
Not exact matches
Only when shedding its invisibility cloak by transforming into an
electron, muon or tau
neutrino could the sterile
neutrino be
detected.
It has now
detected the arrival of 28
electron neutrinos, showing direct signs of this type of
neutrino oscillation, the team announced last week at a physics meeting in Stockholm, Sweden.
This is the
detected pattern of an
electron neutrino candidate event observed by Super-Kamiokande.
The first data set by T2K was published in April, and
detected 32
electron neutrinos and 4
electron anti-
neutrinos.
That means that some of the
electron -
neutrinos generated in the Sun must be turning into muon - and tau -
neutrinos, and that Super-K
detected a few of the converted particles, says Art McDonald of Queens University in Kingston, Ontario.
Super-K
detected muon - and tau -
neutrinos, too, although not as well as it
detected electron -
neutrinos.
Here, too, the experiment
detected a different mix of
neutrinos than expected — in this case, fewer
electron neutrinos and more taus and muons.
one that could
detect just the
electron neutrinos, and another that would count the total flux of all
neutrinos.
To do that, they employed two methods within one detector — one that could
detect just the
electron neutrinos, and another that would count the total flux of all
neutrinos.
When
neutrinos interact with
electrons or nuclei of those water or oil molecules, they give off a flash of light that sensors can
detect.
The latest evidence for sterile
neutrinos emerged in 2011, when a team of theorists argued that various experiments that
detect electron antineutrinos from nearby nuclear reactors saw fewer antineutrinos than they should.
In 1998, physicists found that some muon and
electron neutrinos, which had been produced in the atmosphere and sun, had disappeared en route to the Super-Kamiokande detector in Japan, which can not
detect tau
neutrinos.
On Wednesday, the team announced that six of the muon
neutrinos that started off at J - PARC appear to have transformed into
electron neutrinos before reaching Super-Kamiokande, where they were
detected.
Moreover, the Sudbury
Neutrino Observatory was able to detect all three types of neutrinos directly, and found that the Sun's total neutrino emission rate agreed with the Standard Solar Model, although only one - third of the neutrinos seen at Earth were of the electr
Neutrino Observatory was able to
detect all three types of
neutrinos directly, and found that the Sun's total
neutrino emission rate agreed with the Standard Solar Model, although only one - third of the neutrinos seen at Earth were of the electr
neutrino emission rate agreed with the Standard Solar Model, although only one - third of the
neutrinos seen at Earth were of the
electron type.
For many years the number of solar
electron neutrinos detected on Earth was only a third of the number expected, according to theories describing the nuclear reactions in the Sun.
It didn't include the now known fact that neutinos have a tiny mass allowing
electron neutrinos that are formed in solar fusion to transform into muon
neutrinos which could not be
detected by Davis» experimental apparatus.