Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 68: Standard Model Physics III
T 68.1: Talk
Thursday, March 19, 2026, 16:15–16:30, KH 00.014
Study of sensitivity of VBS VZjj semi-leptonic final states to vector boson polarisation observables — •Aryan Borkar, Thomas Trefzger, Raimund Ströhmer, and Gia Khoriauli — University of Würzburg
The electroweak symmetry breaking mechanism can be experimentally tested in the electroweak vector boson scattering (VBS) processes that occur in proton-proton collisions at the LHC.
The unitarity of VBS cross sections of longitudinally polarised bosons V1,LV2,L → V3,LV4,L, where (V=W±,Z), in the Standard Model are preserved due to inclusion of the Feynman diagrams with the Higgs boson propagator in calculations.Thus, precise measurements of VBS processes of longitudinally polarised vector bosons are important experimental tests of the validity of the Brout-Englert-Higgs mechanism.
We present the preliminary study of the potential of measurements of VZ VBS polarisation observables, in the fiducial phase space as defined by the geometry of ATLAS detector. VBS processes with semi-leptonic final states, where Z decays to a pair of same-flavour oppositely charged leptons and V decays hadronically, are considered in the study.
Keywords: Electroweak Physics; Vector Boson Scatterring; ATLAS Experiment; Polarization; Standard Model