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Scattering of W and Z bosons at high-energy lepton colliders

Fleper, C.; Kilian, W.; Reuter, Jürgen; Sekulla, Marco

Abstract: We present a new study of quasi-elastic W and Z scattering processes in high-energy e+e− collisions, based on and extrapolating the low-energy effective theory which extends the standard model with a 125GeV 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 e+e− 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.

Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.1140/epjc/s10052-017-4656-5
ISSN: 1434-6044, 1434-6052
KITopen ID: 1000067301
Erschienen in The European physical journal / C
Band 77
Heft 2
Seiten 77:120
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