https://doi.org/10.1140/epjc/s10052-017-4656-5
Regular Article - Theoretical Physics
Scattering of W and Z bosons at high-energy lepton colliders
1
Department of Physics, University of Siegen, 57068, Siegen, Germany
2
DESY Theory Group, 22607, Hamburg, Germany
3
Institute for Theoretical Physics, Karlsruhe Institute of Technology, 76128, Karlsruhe, Germany
* e-mail: juergen.reuter@desy.de
Received:
5
August
2016
Accepted:
30
January
2017
Published online:
22
February
2017
We present a new study of quasi-elastic W and Z scattering processes in high-energy 
collisions, based on and extrapolating the low-energy effective theory which extends the standard model with a 
Higgs boson. We parameterize deviations in the low-energy range in terms of the dimension-eight operators that arise in the effective theory. Smoothly extending this to higher energy, we study a set of simplified models of new physics in W / Z scattering, (1) a structureless extrapolation of the effective theory, and (2) scalar and tensor resonance multiplets. The high-energy asymptotics of all models is regulated by a universal unitarization procedure. This enables us to provide benchmark scenarios which can be meaningfully evaluated off shell and in exclusive event samples, and to determine the sensitivity of an collider to the model parameters. We analyze the longitudinal vector-boson scattering modes, where we optimize the cuts for the fiducial cross section for different collider scenarios. Here, we choose energy stages of 1.0, 1.4 and 3 TeV, as motivated by the extendability of the ILC project and the staging scenario of the CLIC project.
© The Author(s), 2017
