Search for high-mass $W\gamma$ and $Z\gamma$ resonances using hadronic W/Z boson decays from 139 fb${}^{-1}$ of $pp$ collisions at $\sqrt{s}=$ 13 TeV with the ATLAS detector

Abstract

A search for high-mass charged and neutral bosons decaying to $W\gamma$ and $Z\gamma$ final states is presented in this paper. The analysis uses a data sample of $\sqrt{s}=13$ TeV proton-proton collisions with an integrated luminosity of 139 fb${}^{-1}$ collected by the ATLAS detector during LHC Run 2 operation. The sensitivity of the search is determined using models of the production and decay of spin-1 charged bosons and spin-0/2 neutral bosons. The range of resonance masses explored extends from 1.0 TeV to 6.8 TeV. At these high resonance masses, it is beneficial to target the hadronic decays of the $W$ and $Z$ bosons because of their large branching fractions. The decay products of the high-momentum $W/Z$ bosons are strongly collimated and boosted-boson tagging techniques are employed to improve the sensitivity. No evidence of a signal above the Standard Model backgrounds is observed, and upper limits on the production cross-sections of these bosons times their branching fractions to $W\gamma$ and $Z\gamma$ are derived for various boson production models.

arXiv comment43 pages in total, author list starting page 26, 8 figures, 3 tables. Published in JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HDBS-2019-10

References in corpus (35)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• Asymptotic formulae for likelihood-based tests of new physics
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• Parton distributions for the LHC Run II
• New parton distributions for collider physics
• Parton distributions with LHC data
• LHAPDF6: parton density access in the LHC precision era
• Confidence Level Computation for Combining Searches with Small Statistics
• Scattering Amplitudes with Open Loops
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Successive Combination Jet Algorithm For Hadron Collisions
• QCD Matrix Elements + Parton Showers
• The Littlest Higgs
• Comix, a new matrix element generator
• Event Generation with Sherpa 2.2
• Pileup subtraction using jet areas
• QCD matrix elements + parton showers: The NLO case
• QCD matrix elements and truncated showers
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Jet Trimming
• A critical appraisal of NLO+PS matching methods
• Energy Correlation Functions for Jet Substructure
• Higgs production via gluon fusion in the POWHEG approach in the SM and in the MSSM
• A framework for Higgs characterisation
• Power Counting to Better Jet Observables
• Heavy Vector Triplets: Bridging Theory and Data
• Low-Scale Technicolor at the Tevatron and LHC
• Plotting the Differences Between Data and Expectation
• Di-photon portal to warped gravity
• KK Gravitons at LHC2
• Z boson decay to photon plus Kaluza-Klein graviton in large extra dimensions

Cited by in corpus (2)

• Visible Collider Signals of Natural Quirks
• Higher-order soft and virtual corrections in $pp\to \gamma W$ production at the LHC