Modified perturbation theory for angular distribution in W-pair production

Abstract

We examine the 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 MPT with the exact results in the model, a coincidence of outcomes at the ILC energies is detected at the per-mille level.

13 pages, 3 figures, matches MPLA version

References in corpus (5)

• Electroweak corrections to charged-current e+e- --> 4 fermion processes - technical details and further results
• The role of polarized positrons and electrons in revealing fundamental interactions at the Linear Collider
• Modified perturbation theory for pair production and decay of fundamental unstable particles
• Pair production of fundamental unstable particles in modified perturbation theory in NNLO
• W-pair production in modified perturbation theory