Acoplanarity dependent interference terms

The s-wave interference adds two new terms to the acoplanarity dependence.

In the absence of s-wave interference:

• Acoplanarity dependent terms are odd functions of cos qv
  • The s-wave interference gives even functions of cos qv

• Acoplanarity terms are functions of cos c and cos 2 c only
  • The s-wave interference gives both cos c and sin c terms and thereby breaks c to -c symmetry

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