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- W1485696514 abstract "We show how to construct covariant amplitudes for processes involving higher spins in this paper. First we give the explicit expressions of Rarita-Schwinger wave functions and propagators for bosons with spins, then kinematic singularity free 3-leg effective vertexes are derived and given in a list. Equivalence relations are worked out to get these independent vertexes. Constraints of space reflection symmetry and boson symmetry are considered and shown in a explicit way. Some helicity amplitudes for two-body decays in center of frame are calculated. Finally the covariant helicity amplitudes for the process $a_1to pi^+pi^+pi^-$ are constructed to illustrate how to include background (1PI) amplitudes. Both background amplitudes and resonance amplitudes are needed to give reliable descriptions to high energy reactions." @default.
- W1485696514 created "2016-06-24" @default.
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- W1485696514 date "1999-03-16" @default.
- W1485696514 modified "2023-09-22" @default.
- W1485696514 title "Covariant amplitudes for mesons" @default.
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