May 15 – 20, 2017
Shanghai Jiao Tong University
Asia/Shanghai timezone
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Studying WVγ production in proton-proton collisions at √s = 8 TeV with the ATLAS experiment

May 16, 2017, 2:00 PM
2h
Haoran 102 (Shanghai Jiao Tong University)

Haoran 102

Shanghai Jiao Tong University

Xuhui Campus

Speaker

Julia Isabell Djuvsland (Ruprecht-Karls-Universitaet Heidelberg (DE))

Description

Quartic gauge couplings are tested by this study of the production of WVγ events (where V = W or Z) in
20.2 fb−1 of proton-proton collisions at a centre-of-mass energy of √s = 8 TeV recorded with the ATLAS detector. The
fully-leptonic final state of WWγ events containing an electron, a muon and a photon is analysed as well as
semi-leptonic final states of WVγ production containing an electron or a muon, two jets and a photon. For all final
states two different fiducial regions are defined: one yielding the best sensitivity to the production cross section of the
process and one optimised for the detection of new physical phenomena. In the former region, the WWγ production
cross section is computed using the fully-leptonic final state. In addition, upper limits on the production cross section
are derived in both regions for all final states individually and for the combination of the semi-leptonic final states. The
results obtained in the new physics phase space are combined for the interpretation in the context of anomalous
quartic gauge couplings using an effective field theory.

Primary author

Julia Isabell Djuvsland (Ruprecht-Karls-Universitaet Heidelberg (DE))

Presentation materials