Two scientists share 2015 Nobel Prize in Physics

On the rare occasion that a neutrino strikes an atom’s nucleus, the collision produces a dim streak of light that contains information about its energy and the direction it’s traveling. Determining the absolute weight of neutrinos is something his team at the Karlsruhe Tritium Neutrino experiment, or KATRIN, hopes to start working on next year.


Their discovery, Hill says, “would have a big influence on our understanding of the universe”. Detailed examination of the properties of neutrinos will let scientists develop an even more robust model.

Arthur McDonald and Takaaki Kajita.

So neutrinos may hold the key to expanding our understanding of matter.

“The current year’s prize speaks the truth changes in character among probably the most bottomless occupants in the universe“, the board of trustees said amid a news gathering.

These experiments resulted in the extraordinary conclusion that neutrinos necessarily had to contain mass, however small that mass might be, as it was a prerequisitive for neutrinos to change their “flavour”.

She also recalled that the research had been a hard process. “I gave my wife a hug”.

He was still nervous hours later at the news conference. “My mind has gone completely blank. I don’t know what to say”, went on to stress that many people had contributed to his work. The second was spotted in the Super-Kamiokande experiment in Japan, in 1998.

The 2002 Physics Nobel was awarded “for pioneering contributions for the detection of cosmic neutrinos”. It came after Kajita but he also proved neutrino oscillation in another channel. Solar physicists kept improving their models, but they did not get rid of the neutrino deficit, providing a few support for an idea that had been kicking around among theorists for years: neutrinos might oscillate identities, switching among the different flavors. “The two deserved this award”.

Dr. Ian Hill is now acting dean of Dalhousie’s Faculty of Science and a professor of physics.

And, hopefully, more Nobel Prizes.

“Mr. Kajita achieved a long-cherished dream of all human beings to understand the basics of the universe”, he said.

McDonald has retired from teaching, but is still involved in research. Exhibit in the National Museum of Nature and Science, Tokyo, Japan.

Arthur McDonald, a professor emeritus at Queen’s University and the director of the Sudbury Neutrino Observatory (SNOLAB), shared the prize with Japanese scientist Takaaki Kajita for their groundbreaking work on neutrinos. “So the problem we have then is why are we here containing only matter?” Around the turn of the century, Kajita and his colleagues recorded evidence of neutrinos changing identities during the 183-mile journey from the proton accelerator lab in Tokai that generated them to the detector. They were thought to be massless. “We were able to see that neutrinos appeared to change from one type to the other”, McDonald said today during the Nobel announcement. (Photons, or particles of light, are the most numerous.) The tiny particles come in three flavors: electron, muon and tau. “Chinese people have wished to win the Nobel Prize for a long time”.

The first thing the 72-year-old did as a Nobel Prize victor was hug his wife. Only two were women.

John Bardeen is the only person, who has won it twice, for his work in superconductivity and semiconductors.


On Monday, Tu Youyou of China, Irish-born American William Campbell, and Japan’s Satoshi Omura won the Nobel Medicine Prize for unlocking revolutionary treatments for malaria and roundworm, diseases that blight millions of lives.

Physics Nobel for discovery that neutrinos can change flavour