Selection rules for helicity amplitudes in massive gauge theories

After a rediscussion of the vanishing theorems for helicity amplitudes in unbroken gauge theories, we study the case of spontaneously broken gauge theories at high energy. The vanishing theorems generalize to a definite pattern of m/E suppression of the amplitudes that vanish in the massless case, where E is the energy scale of the process and m is the mass of the gauge vectors. We use only elementary arguments, and as an application we show how these methods can be employed to understand some aspects of the effective W approximation in the polarized case. DOI: 10.1103/PhysRevD.87.074026


Published in:
Physical Review D, 87, 7
Year:
2013
Publisher:
College Pk, Amer Physical Soc
ISSN:
1550-7998
Laboratories:




 Record created 2013-10-01, last modified 2018-01-28


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)