https://doi.org/10.1007/s100529800817
Theoretical physics
Perturbative thresholds in the physical region
Departamento de Física Aplicada, CINVESTAV-IPN, Apdo. Postal 73 “Cordernex”, 97310, Mérida, Yucatán, México
* e-mail: abouzas@fis.cinvestav.mx
Received:
24
October
1997
Published online: 16 September 2013
We consider unstable-particle scattering in the context of 3-body processes. We show that all partial-wave cross-sections are finite and positive, and the total cross-section is proportional to the transverse size of space in the region of on-shell particle exchange. We comment on the role of loop corrections.
© Springer-Verlag, 1998