 \left ( \begin {array} { c } \chi ^ R \\ \chi ^ L \end {array} \right ) = \frac { 1 } { \sqrt { 2 } } \left ( \begin {array} { c } H _ 0 + H _ 4 \\ H _ 0 - H _ 4 \end {array} \right ) \ , \llama \rhino \sloth