Nobel Prize in Physics awarded to Francis Halzen for 'discovery of high-energy neutrinos of astrophysical origin'
Francis Halzen has received the 2026 Nobel Prize in Physics for his crucial role in the IceCube Neutrino Observatory and the discovery of high-energy astrophysical neutrinos
Francis Halzen has been awarded the 2026 Nobel Prize in Physics for his pivotal role in the IceCube Neutrino Observatory and the discovery of high-energy neutrinos originating from astrophysical sources. His innovative approach involved using the South Pole's glacial ice to detect these elusive subatomic particles by observing the light flashes produced during their collisions with atomic nuclei. This research, supported by an international collaboration, has led to the development of a remarkable instrument that is transforming astronomy and opening up new avenues of scientific exploration. The Nobel Prize, a highly esteemed accolade, will be presented to Halzen along with other laureates in Stockholm on December 10.
Francis Halzen has been awarded the 2026 Nobel Prize in Physics for his pivotal role in the IceCube Neutrino Observatory and the discovery of high-energy neutrinos originating from astrophysical sources. His innovative approach involved using the South Pole's glacial ice to detect these elusive subatomic particles by observing the light flashes produced during their collisions with atomic nuclei. This research, supported by an international collaboration, has led to the development of a remarkable instrument that is transforming astronomy and opening up new avenues of scientific exploration. The Nobel Prize, a highly esteemed accolade, will be presented to Halzen along with other laureates in Stockholm on December 10.
Francis Halzen has been awarded the 2026 Nobel Prize in Physics for his pivotal role in the IceCube Neutrino Observatory and the discovery of high-energy neutrinos originating from astrophysical sources. His innovative approach involved using the South Pole's glacial ice to detect these elusive subatomic particles by observing the light flashes produced during their collisions with atomic nuclei. This research, supported by an international collaboration, has led to the development of a remarkable instrument that is transforming astronomy and opening up new avenues of scientific exploration. The Nobel Prize, a highly esteemed accolade, will be presented to Halzen along with other laureates in Stockholm on December 10.
The Nobel Prize in Physics for 2026 has been given to Francis Halzen, “for decisive contribution to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos of astrophysical origin”, the organisation announced on Monday.
The press release by the Nobel Prize Organisation said that Halzen realised that the ice at the South Pole could be used to track particles known as neutrinos.
A neutrino is a neutral subatomic particle that passes through normal matter without being noticed. Halzen found a way to capture a neutrino at the South Pole in 1988.
"When a neutrino collides with an atomic nucleus, it produces a flash of light that can be tracked by sensors in the clear glacial ice. The South Pole’s ice has many advantages, as it is free from various types of interference and the area is geologically stable, with no earthquakes. Halzen and his idea soon gained the support of other researchers and, just a few years later, preliminary testing was conducted on sensors in ice," the press release read.
The discovery helped develop the IceCube Neutrino Observatory – a cubic kilometre of ice that is equipped with light sensors. The enormous volume of ice is necessary as cosmic neutrinos with high energies are very rare.
The neutrino interactions collected by IceCube can provide researchers with knowledge about "the violent settings in which high-energy neutrinos can be created – and could even reveal previously unknown cosmic phenomena."
Mark Pearce, Chair of the Nobel Committee for Physics, said “Francis Halzen has led an international team of researchers and engineers who have provided us with a fantastic instrument. His tenacity and scientific vision has paved the way for a new kind of astronomy.”
Francis Halzen is a Professor at the University of Wisconsin–Madison, USA.
The laureates are selected by the Nobel Assembly of Sweden's Karolinska Institute medical university. They are set to receive a prize sum amounting to 12 million Swedish crowns, which is shared if there are multiple winners. The prizes will be presented to the winners in a ceremony in Stockholm, Sweden on December 10.
Last year the prize went to John Clarke, Michel H. Devoret and John M. Martinis “for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in an electric circuit.”
There are six Nobel prizes awarded every year in the fields of physiology or medicine, physics, chemistry, economic sciences, literature and peace work.
This year had a total of 287 candidates, 208 individuals and 79 organisations, according to the Nobel Committee. The rest of the prize winners will be announced each day from October 7 to 9 and October 12 between 5 am and 7 am Eastern Time or 2:30 to 4:30 pm IST. The announcements are made from Oslo and Stockholm and are livestreamed on the official pages of the Nobel Prize organisations.