Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 14: Elektroschwache Wechselwirkung

T 14.8: Talk

Monday, March 25, 2019, 17:50–18:05, S14

Study of anomalous gauge couplings using WZ channel in ATLAS — •Lilly Wuest — IKTP; TU Dresden, Germany

Studies of anomalous quartic gauge couplings assuming an insignificant impact of triple gauge couplings in the sensitive phase space of aQGC. To study aQGC without calculations of aTGC it’s needed to test the sensitivity of this couplings in the VBS phase space.

The triple and quartic gauge couplings are part of the standard model. A direct test of the standard model and an indirect search of new physics is given by studies of gauge couplings. The expansion of the standard model with an effective field theory would describe deviations in the cross section and kinematic distributions of gauge couplings. Samples of aTGC α_W⁴, aTGC α_W⁶ and aQGC are simulated. Simulations and data taken in 2015/16 at a center of mass energy of √s=13 TeV at the ATLAS detector at the LHC with a total luminosity of 36.1 fb⁻¹ for the WZ channel are analyzed. The limits of aTGC are extracted in the inclusive WZ phase space. The sensitivity of aTGC in it’s limits is tested in the VBS phase space. And it is investigated if the impact of aTGC is significant for the calculation of the limits of aQGC in the VBS phase space.