Belgian-American physicist Francis Halzen, 82, has been named as the recipient of the 2026 Nobel Prize in Physics in Stockholm. The Royal Swedish Academy of Sciences recognized Halzen for his pivotal role in the IceCube Neutrino Observatory and the discovery of high-energy astrophysical neutrinos. Situated at the Amundsen–Scott South Pole Station in Antarctica, Halzen’s innovative use of ice in tracking neutrinos, also known as “ghost particles,” has provided insights into the cosmos.
Eva Olsson from the Academy described neutrinos as messengers from distant galaxies, shedding light on processes like exploding stars. The Nobel Physics Prize, awarded annually by the Royal Swedish Academy of Sciences, carries a monetary award of 12 million Swedish crowns ($1.7 million Cdn).
The IceCube, covering a cubic kilometer, became operational in 2011, culminating a vision initiated in the late 1980s. Halzen expressed gratitude to his collaborators over the years, emphasizing the initial skepticism surrounding the project’s success.
Affiliated with the University of Wisconsin–Madison, Halzen expressed delight and surprise at the announcement while attending a conference in Italy. In 2014, Smithsonian magazine dubbed him “Neutrino Man” when honoring him with an Ingenuity Award.
Neutrinos, omnipresent and with minuscule mass, offer insights into the universe’s evolution. Scientists detect these elusive particles by observing their interactions with matter, producing light flashes or charged particles.
Halzen led an international team that developed a groundbreaking instrument enabling new avenues in astronomy. The Nobel Committee for Physics hailed his determination and vision, opening doors to a new era of astronomical exploration.
An extension to the observatory, IceCube-Gen2, is planned to cover eight cubic kilometers of ice by 2033, boosting neutrino detection capabilities significantly. Despite current achievements, Halzen believes the full potential of his work and its implications for astronomy are yet to be fully realized.
Belgian Prime Minister Bart De Wever commended Halzen’s dedication to unraveling cosmic mysteries through neutrino research. The Swedish academy had previously acknowledged the discovery of neutrino oscillations in 2015, with Canadian scientist Dr. Arthur McDonald sharing the Nobel physics prize that year.
The Nobel Prize in Chemistry, literature, peace, and economics will be announced in the following days, with laureates due to receive their awards on December 10th, Alfred Nobel’s death anniversary. Nobel’s establishment of the prizes was influenced by his desire to recognize individuals who have contributed significantly to humanity.
