ATLAS Levels Up
Subtitle: Early Searches for Diboson Resonances in Semi-Hadronic Decay Channels at √ s = 13 TeV Center of Mass Energy
By: Steven Patrick Alkire
Publisher: [publisher not identified]
Published: 2017
Place of publication: [New York, N.Y.?]
Language: eng
Description: Searches are made for narrow diboson resonances, ZZ and ZW, in the final states llqq and ννqq at ATLAS, with (13.2±0.4) fb−1data collected from pp-collisions with center of mass energy √ s=13 TeV during 2015 and 2016, the first two years of Run 2 of the Large Hadron Collider. The hadronic decay products of the vector boson, V → qq, are reconstructed as jets in the electromagnetic and hadronic calorimeters. When the vector boson is sufficiently boosted the decay products are reconstructed as a single anti-kt R = 1.0 jet. Otherwise two anti-kt R = 0.4 jets are matched to identify the vector boson. The Z boson in its leptonic decay is identified by either reconstructing two electrons in the calorimeters, or opposite sign muons in the muon spectrometer. Limits on the production cross section for 3 benchmark signals, a heavy scalar, a spin-1 heavy vector triplet, and a spin-2 graviton are set in the mass range 300 GeV to 5000 GeV.
Notes: Department: Physics.

Thesis advisor: Emlyn W. Hughes.

Thesis (Ph.D.)--Columbia University, 2017.