7.8: Symmetries and Selection Rules
( \newcommand{\kernel}{\mathrm{null}\,}\)
We shall often use the exact symmetries discussed up till now to determine what is and isn’t allowed. Let us, for instance, look at
( \newcommand{\kernel}{\mathrm{null}\,}\)
We shall often use the exact symmetries discussed up till now to determine what is and isn’t allowed. Let us, for instance, look at