Renowned Belgian American physicist, Francis Halzen, aged 82, has been named the recipient of the 2026 Nobel Prize in Physics in Stockholm. The prestigious award was bestowed upon him for his significant contributions to the IceCube Neutrino Observatory and the detection of high-energy neutrinos of cosmic origin. Situated at the Amundsen–Scott South Pole Station in Antarctica, the observatory was conceptualized by Halzen to harness the properties of ice in tracking neutrinos, which are elusive particles known for traversing matter without leaving a trace.
Eva Olsson from the Royal Swedish Academy of Sciences described neutrinos as messengers carrying insights from the universe, shedding light on distant galaxies and stellar phenomena. Each year, the Nobel Physics Prize recipients are chosen by the Royal Swedish Academy of Sciences and receive a generous award amounting to 12 million Swedish crowns ($1.7 million Cdn).
The IceCube Neutrino Observatory, covering a cubic kilometer, commenced operations in 2011, culminating from a vision initiated in the late 1980s. Halzen, expressing gratitude to his collaborators over the years, reflected on the initial skepticism surrounding the project’s success. Affiliated with the University of Wisconsin–Madison for several decades, Halzen conveyed his surprise and delight at the announcement while attending a conference in Italy.
Neutrinos, ubiquitous minuscule particles with negligible mass, emanate from celestial bodies like stars, including the sun, with trillions passing through our bodies every second. These ghostly particles remain imperceptible, necessitating scientists to observe their interactions with matter, generating light flashes or charged particles.
Mark Pearce, chair of the Nobel Committee for Physics, lauded Halzen for leading a global team that developed an invaluable instrument, enabling a new era of astronomy. Plans are underway to expand the observatory with IceCube-Gen2, encompassing eight cubic kilometers of ice and poised to detect a greater number of neutrinos, including weaker variants. Halzen emphasized that the true impact of his work is yet to be fully realized, underscoring the ongoing scientific exploration awaiting discovery.
Acknowledging Halzen’s dedication to unraveling cosmic mysteries through the study of neutrinos, Belgian Prime Minister Bart De Wever extended congratulations for his profound contributions. The discovery of neutrino oscillations, recognized by the Swedish academy in 2015, saw Canadian scientist Dr. Arthur McDonald sharing the Nobel Physics Prize that year.
The Nobel Prize in Chemistry is set for announcement on Wednesday, followed by the literature prize on Thursday and the peace prize on Friday. The economics prize winner will be revealed on October 12. Instituted by Alfred Nobel, the prizes are awarded to individuals who have made significant contributions benefiting humanity. The laureates will receive their awards on December 10, commemorating Nobel’s legacy.