Nicola Cabibbo was an influential Italian theoretical physicist, born on May 10, 1935, and he passed away on January 16, 2010. He is best known for his contributions to particle physics, particularly for his work on the theory of electroweak interactions and the concept of "Cabibbo mixing," which describes the mixing between different types (flavors) of quarks.
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A physicist working on quark mixing.[ref]
Nicola Cabibbo (1935-2010) by CERN. Independent professional identity
Portrait of Nicola Cabibbo
. Marcella Bona. CC BY-SA 2.0, via Wikimedia Commons. Source.