Belgian-American physicist Francis Halzen has been awarded the 2026 Nobel Prize in Physics for his decisive contributions to the IceCube Neutrino Observatory in Antarctica.
An announcement on the official Nobel Prize website stated that the prestigious award recognizes Halzen for his crucial role in establishing the observatory and for the discovery of high-energy neutrinos originating from deep space.
According to the prize committee press release, Halzen first presented his proposal to capture neutrinos at the South Pole in 1988. The facility detects these particles by recording the flashes of light produced when a neutrino collides with an atomic nucleus inside transparent glacial ice, using an array of optical sensors installed throughout the glacier.
Neutrinos are fundamental subatomic particles with near-zero mass and no electrical charge. Produced by extreme cosmic occurrences such as exploding stars and black holes, trillions of them traverse space and pass through solid matter unhindered, making them notoriously difficult to detect without massive specialized sensors.
Detecting Cosmic Particles in Antarctic Ice
The IceCube Neutrino Observatory covers an entire cubic kilometer of clear glacial ice near the South Pole in Antarctica. Construction of the detector facility was completed in 2011 following a decade of polar engineering and deep-ice drilling.
Through IceCube, scientists succeeded in detecting high-energy neutrinos that originated far outside the Solar System. The discovery enabled researchers to investigate high-energy astrophysical processes that cannot currently be studied using terrestrial particle accelerators on Earth.
Halzen was born in Belgium in March 1944. He completed his studies at the University of Leuven in Belgium, graduating in 1966, before relocating to the United States. He has been a professor of physics at the University of Wisconsin in Madison since 1972.
The University of Leuven, founded in 1425, is one of the oldest research universities in Europe. The University of Wisconsin in Madison serves as the headquarters for the international IceCube collaboration, bringing together scientists from institutions around the world.
Prize Ceremony and Recent Winners
The formal award ceremony for the new laureate will take place on December 10 in Stockholm, Sweden. Halzen will receive a diploma, a gold medal, and a cash award of 12 million Swedish kronor, which amounts to approximately 1.2 million dollars.
The Nobel Prizes have been awarded annually on December 10, the anniversary of the death of founder Alfred Nobel, since 1901. The physics prize is selected and presented by the Royal Swedish Academy of Sciences, an independent non-governmental scientific organization in Stockholm.
In 2025, the Nobel Prize in Physics was awarded to John Clarke, Michel Devoret, and John Martinis. The trio received the prize for their discovery of macroscopic quantum-mechanical tunneling and energy quantization in electric circuits.
Quantum-mechanical tunneling refers to a fundamental physical phenomenon where subatomic particles pass through energy barriers that classical physics suggests they cannot cross, laying key foundations for modern microelectronics and quantum computing devices.
