Pascal Borel, Roberto Franceschini, Riccardo Rattazzi, Andrea Wulzer
We analyze the kinematic conditions under which the scattering of equivalent
massive spin-1 vector bosons factorizes out of the complete process. In
practice, we derive the conditions for the validity of the effective W
approximation, proposed long ago but never established on a firm basis. We also
present a parametric estimate of the corrections to the approximation and
explicitly check its validity in two examples.
View original:
http://arxiv.org/abs/1202.1904
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