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Mysterious Mixing: Good things often Standard Model of particle physics is no exception. It organizes elementary particles into three “generations.” Take quarks, for eg. The first generation includes “up” and “down” quarks, which form building blocks of atomic nuclei. Beyond these, two additional pairs exist: “charm” & “strange” quarks, as well as “top” & “bottom” quarks. Together, these six varieties are called the six (6) quark flavors. Standard Model predicts quark flavors can transmute into one another in a process called quark mixing. However, it doesn’t specify how frequently transformations occur.  What could this mean? Is it a sign of physics beyond the Standard Model?

Advancements in Quark Mixing Analysis:
To answer question, UvA-IoP physicist Jordy de Vries & colleagues from Los Alamos, Seattle, Bern have developed a new framework performed associated calculations to very precisely determine amount of mixing between up and down quarks, for which effect is strongest. The work was recently published jointly in Physical Review Letters as an Editor’s Suggestion in Physical Review C.
https://scitechdaily.com/are-quarks-abou...f-physics/