Hadronic form factor
= Hadronic form factor
{title2=$F(q^2)$}
A <hadronic form factor> parametrizes a current <matrix element> between <hadron> states, separating allowed <Lorentz covariant> <tensor> structures from <scalar-valued functions> of <Lorentz invariant> combinations of <momentum transfer>. These functions encode composite structure and <strong interaction> dynamics. Equal kinematic <phase space> does not imply equal form factors for different <weak interaction> transitions.