Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 21: Electroweak physics I

T 21.6: Talk

Monday, March 30, 2020, 17:45–18:00, L-3.016

Measurement of W+γ production via electroweak vector boson scattering in pp collisions at √s=13 TeV at ATLAS — •Burkhard Böhm, Gia Khoriauli, and Raimund Ströhmer — Universität Würzburg

Electro-weak vector boson scattering (VBS) processes provide a way to search for deviations from the Standard Model (SM) electroweak theory predictions by measuring the triple and quartic couplings between gauge bosons. The cross sections of the VBS processes are predicted to be relatively small in the SM and most of them are not yet measured by the ATLAS experiment in proton-proton collisions with √s=13 TeV. Thus, studying the VBS processes can yield interesting new results.

This work presents an on-going test of the SM by measuring the VBS process when two initial vector bosons radiate from the colliding quarks inside protons and result to a production of W+γ and two hadronic jets with large separation in pseudo-rapidity as a final state. The W boson further decays into a muon and a neutrino. ATLAS data from 2018 collected at √s=13 TeV of proton-proton collisions and the corresponding Monte-Carlo simulation samples are used in the study. The goal of the study is to contribute to the ATLAS full analysis of the W+γ production via the electroweak vector boson scattering.