Francis Halzen Wins Nobel Prize in Physics for IceCube Neutrino Observatory
Particle physicist Francis Halzen has won the 2026 Nobel Prize in Physics for his decisive contributions to the IceCube Neutrino Observatory and the discovery of high-energy neutrinos from the universe. The award recognizes how his invention transformed humanity’s view of the universe by opening a window to previously unobservable distant galaxies.
From Tienen to Antarctica via CERN
Born in Tienen, Belgium, Halzen earned his doctorate in physics at KU Leuven before conducting research at CERN in Switzerland. He subsequently moved to the United States to join the university in Madison, Wisconsin, where he conceived the IceCube Neutrino Observatory. Constructed one and a half kilometers beneath the Antarctic ice sheet, the detector captures elusive ghost particles known as neutrinos to trace cosmic phenomena back to their origins. The particle physicist from Tienen is the twelfth Belgian to join the gallery alongside Albert Einstein, Marie Curie, Mother Teresa, Barack Obama, and Bob Dylan.
KU Leuven Celebrates Halzen as Fourth Nobel Alumnus
KU Leuven professor Thomas Hertog described Halzen as the godfather behind IceCube, noting that while hundreds or even thousands of researchers contributed to the massive infrastructure, Halzen’s merit should not be underestimated. KU Leuven officials highlighted that Halzen is now the fourth alumnus of the institution to receive a Nobel Prize, sparking enthusiastic reactions across his former academic department.
Municipal Plans in Tienen
In his hometown of Tienen, local officials are evaluating ways to honor the physicist, with Mayor Jonathan Holslag suggesting a potential statue. Halzen accepted the prize during a conference in Italy, directing praise toward the international engineers and researchers who built and operated the detector alongside him. We joked with each other that we would only go if a French restaurant opened,
recounts friend and colleague Nick Van Eijndhoven, physicist at the VUB.