Spectator quark
= Spectator quark
A constituent <quark> that does not participate in the elementary weak vertex of a <meson> decay. It combines with a produced <quark> or <antiquark> in the final <hadron>.
= Spectator quark
A constituent <quark> that does not participate in the elementary weak vertex of a <meson> decay. It combines with a produced <quark> or <antiquark> in the final <hadron>.