Changes

U | J m \rangle

U | J m \rangle

</math>

</math>

We can also describe the angular momentum between the daughters as being ''L'' and their spin sum as ''s''. Alternatively, we will label the daughters as having helicities of <math>\lambda_1</math> and <math>\lambda_2</math> - projections of the two particles' spins onto their respective momentum directions.

Instead of specifying the final-state particles' spin state via their helicities, we can first couple their spins together independent of their momentum direction, to obtain total spin ''S'', then couple ''S'' to their relative orbital angular momentum ''L'' to obtain their total angular momentum ''J''.

:<math>

<td><math>

\langle \Omega \lambda_1 \lambda_2 | U | J m \rangle

\langle \Omega \lambda_1 \lambda_2 | U | J m \rangle

=

=