Nobel Prize in Physics 2026: Francis Halzen for IceCube neutrinos
Why in the news
On 6 October 2026, the Royal Swedish Academy of Sciences awarded the Nobel Prize in Physics 2026 to Francis Halzen for his central role in the IceCube Neutrino Observatory and the detection of high-energy neutrinos coming from outside the solar system.
Key facts
- Laureate: Francis Halzen (82), born in 1944 in Tienen, Belgium; based at the University of Wisconsin–Madison, USA.
- Sole winner: a rare single-laureate physics prize in recent years.
- Prize money: 12 million Swedish kronor; awards are presented on 10 December.
- Previous year: the 2025 physics prize went to John Clarke, Michel Devoret and John Martinis.
About IceCube
| Feature | Detail |
|---|---|
| Location | South Pole, Antarctica |
| Size | About one cubic kilometre of ice |
| Idea proposed | 1988, by Halzen |
| Completed | 2011 |
| Method | Light sensors pick up Cherenkov flashes when neutrinos hit atomic nuclei in the ice |
Neutrinos are tiny, almost massless particles produced by stars and other cosmic events. They rarely interact with matter, which is why they are called ghost particles. Soon after IceCube was finished, scientists recorded the first high-energy neutrinos, and a few years later reported neutrinos arriving from beyond the solar system, opening a new way to study the universe.
Exam angle
- Physics Nobel 2026: Francis Halzen; field: neutrino astronomy.
- IceCube is at the South Pole; neutrinos are known as ghost particles.
- Physics Nobel is awarded by the Royal Swedish Academy of Sciences.