Belgian-American particle physicist, Francis Halzen, aged 82, has been named as the recipient of the 2026 Nobel Prize in Physics in Stockholm. The prestigious award was granted in recognition of his significant contributions to the IceCube Neutrino Observatory and the detection of high-energy neutrinos from astrophysical sources, as stated by the award-giving organization.
Halzen’s groundbreaking realization that ice at the South Pole could serve as a medium for tracking neutrinos, also known as “ghost particles” due to their ability to traverse through matter without leaving a trace, has revolutionized the field of particle physics. These neutrinos act as messengers, providing valuable insights into distant galaxies and the phenomena occurring within them, as highlighted by Eva Olsson from the Royal Swedish Academy of Sciences.
The Nobel Physics Prize recipients are chosen annually by the Royal Swedish Academy of Sciences and are granted a prize sum of 12 million Swedish crowns ($1.7 million Cdn). The IceCube Neutrino Observatory, spanning an entire cubic kilometer, became operational in 2011, marking the realization of a vision that originated in the late 1980s.
Expressing his gratitude to his collaborators over the years, Halzen, affiliated with the University of Wisconsin–Madison, shared his delight and surprise at receiving the prestigious award while attending a conference in Italy. His work on studying neutrinos, which are fundamental particles offering insights into the evolution of the universe, has been lauded by Mark Pearce, the chair of the Nobel Committee for Physics.
Plans are underway for an extension of the observatory, known as IceCube-Gen2, which will cover eight cubic kilometers of ice and enable the detection of a significantly higher number of neutrinos, including weaker ones, once operational in 2033. Halzen remains optimistic about the future discoveries that his work may unveil, emphasizing that the true potential of his contributions is yet to be fully realized.
Acknowledging Halzen’s dedication to unraveling the mysteries of the cosmos, Belgian Prime Minister Bart De Wever congratulated him for his remarkable achievements. The Nobel Prize in Chemistry, Literature, Peace, and Economics will be announced on subsequent days, leading up to the presentation of the awards to the laureates on December 10, the anniversary of Alfred Nobel’s death.
