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Coherent helicity amplitude for sequential decays

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arxiv 1704.05184 v1 pith:6QM7SOMR submitted 2017-04-18 hep-ph hep-ex

Coherent helicity amplitude for sequential decays

classification hep-ph hep-ex
keywords helicityamplitudescoherentchainsdecayrotationsadditionalallows
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present a derivation of coherent helicity amplitudes for a particle decaying into multifinal states with nonzero spins. The results show that the coherent amplitudes introduce additional rotations to transform the helicities into a consistent helicity system, which allows us to add helicity amplitudes for different decay chains coherently. These rotations may have significant effects on the interference between the decay chains in the partial wave analysis.

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