Abstract
The analyticity properties of helicity amplitudes for binary reactions of particles with arbitrary spins are studied using the following three properties: (i) the analyticity properties of scattering amplitudes, assuming these are correctly predicted by perturbation theory; (ii) the crossing relations of helicity amplitudes near $s=0$; (iii) the threshold behavior of partial-wave amplitudes. Making use of these properties, kinematical singularity-free amplitudes for any spin are constructed by modifying helicity amplitudes. MacDowell reciprocity is generalized to arbitrary spin. Helicity amplitudes are proved to satisfy the Froissart limit at the high-energy limit.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
