Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 83: Elektroschwache Wechselwirkung II
T 83.2: Vortrag
Donnerstag, 22. März 2018, 16:45–17:00, Z6 - SR 1.005
Separating WW and ZZ events in their hadronic decays at the International Linear Collider — •Jakob Beyer1, 2, Michael Kobel2, and Jenny List1 — 1DESY Hamburg — 2Technische Universität Dresden
Electroweak precision measurements at an e+e− collider are the next step in testing the Standard Model - and complementary to the LHC. Such measurements can be provided at the future International Linear collider (ILC). Its polarized electron and positron beams, the precise event reconstruction using state-of-the-art detectors as well as the excellent theoretical calculability present an ideal environment for this enterprise.
The baseline design of the ILC provides a center-of-mass energy of 250 GeV but extensions up to 1 TeV are possible. With such an extension additional important physics measurements, e.g. of the quartic gauge coupling, could be performed. At the ILC, these studies can include the dominant hadronic decay modes of the W and Z due to the low QCD background. Even VBS-like signatures like e+e− → νν WW / νν ZZ are then accessible in their hadronic final states, allowing for a significant increase in signal events. For such measurements the separability of the W and Z decays to two jets is important and constitutes a benchmark for the detectors.
A study of this separation power at International Large Detector is performed in the case of diboson (WW/ZZ)+νν events at the √s=1 TeV ILC.