The 2015 #NobelPrize in Physics is awarded to Takaaki Kajita @ The University of Tokyo and Arthur B. McDonald @Queen’s University “for the discovery of neutrino oscillations, which shows that neutrinos have mass”
BREAKING NEWS The 2015 #NobelPrize in Physics is awarded to
Takaaki Kajita @ The University of Tokyo
Arthur B. McDonald @Queen’s University
“for the discovery of neutrino oscillations, which shows that neutrinos have mass”
They are awarded for their key contributions to the experiments which demonstrated that neutrinos change identities. This metamorphosis requires that neutrinos have mass. The discovery has changed our understanding of the innermost workings of matter and can prove crucial to our view of the universe.
The discovery rewarded with this year’s Nobel Prize in Physics have yielded crucial insights into the all but hidden world of neutrinos. After photons, the particles of light, neutrinos are the most numerous in the entire cosmos. The Earth is constantly bombarded by them.
Many neutrinos are created in reactions between cosmic radiation and the Earth’s atmosphere. Others are produced in nuclear reactions inside the Sun. Thousands of billions of neutrinos are streaming through our bodies each second.
Neutrino means ”small neutral one” in Italian.
Press release “Metamorphosis in the particle world”: http://goo.gl/jRi8jy
Super-Kamiokande is a gigantic detector built 1,000 metres below the Earth’s surface. It consists of a tank, 40 metres high and as wide, filled with 50,000 tonnes of water.
Super-Kamiokande detects atmospheric neutrinos. When a neutrino collides with a water molecule in the tank, a rapid, electrically charged particle is created. This generates Cherenkov radiation that is measured by the light sensors. The shape and intensity of the Cherenkov radiation reveals the type of neutrino that caused it and from where it came. The muon-neutrinos that arrived at Super-Kamiokande from above were more numerous than those that travelled through the entire globe. This indicated that the muonneutrinos that travelled longer had time to change into another identity on their way.
LIVE STREAM of the announcement of the 2015 #NobelPrize in Physics – see it when it happens!
The Nobel Prize in Physics 2015 was awarded jointly to Takaaki Kajita and Arthur B. McDonald “for the discovery of neutrino oscillations, which shows that neutrinos have mass”.
The prize was announced by Göran K. Hansson, Permanent Secretary of the Royal Swedish Academy of Sciences.
Location: The Royal Swedish Academy of Sciences, Sessionssalen, Lilla Frescativägen 4A, Stockholm, Sweden