Neutrino exchange and asymptotic behaviour of weak interaction cross sections
Abstract
It is argued that total cross sections cannot increase asymptotically as a power of energy even in the presence of massless particle exchange. Elastic νν scattering is considered as an example. The properties of s- and t-channel partial waves are analysed and it is shown that the above statement is true if the amplitude is bounded by a polynomial in s for s→∞ and t>0 and if its singularity at t=0 is dominated by two-particle exchange.
- Publication:
-
Nuclear Physics B
- Pub Date:
- August 1973
- DOI:
- 10.1016/0550-3213(73)90664-0
- Bibcode:
- 1973NuPhB..59..611D