Partial Wave Unitarity ?

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Partial Wave Unitarity ??

Is there anyone who deals with "Partial Wave Unitarity" in Quantum Mechanics before??
 

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pam
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"Partial wave unitarity" means that the largest possible scattering amplitude squared (|A|^2) for any partial wave is when sin^2(delta)=1, where delta is the phase shift.
This means that |A|^2 is limited by 4 pi(2L+1)^2/k^2.
That is for spinless particles. Spin factors come in otherwise.
Many people deal with this.
 

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