1205.6340 (M. L. Nekrasov)

Modified perturbation theory for angular distribution in W-pair
production    [PDF]

M. L. Nekrasov

We examine capabilities of the modified perturbation theory (MPT) for description of W-pair production and decay in e^{+}e^{-} annihilation. In a model with Dyson-resummed propagators of unstable particles, we calculate even and odd contributions to the distribution in the cosine of the W^{-} production angle relative to the e^{-} beam. On comparing the results of calculations in the NNLO approximation of the MPT with the exact results in the model, a coincidence of outcomes at the ILC energies is detected at the per-mille level.

View original: http://arxiv.org/abs/1205.6340