# Is weak interaction the only interaction capable of changing the flavor of leptons?

I see this sentence in wiki about weak interaction:

It is the only interaction capable of changing the flavor of quarks.

So why only quarks? Why not leptons? Is there another interaction which can change the flavor of leptons?

• The same could be said of leptons. The wiki was just restrictions the statement to quarks. – Lewis Miller Sep 11 '16 at 17:32
• The $W^\pm$ bosons flip the charge of quarks and leptons. This is the flavor changing weak interaction. – Lawrence B. Crowell Sep 11 '16 at 18:53