@article{OPUS4-22693,
  title     = {FCC Physics Opportunities: Future Circular Collider Conceptual Design Report Volume 1},
  series = {European Physical Journal C},
  volume    = {79},
  journal   = {European Physical Journal C},
  number    = {474},
  organization    = {The FCC Collaboration},
  doi       = {10.1140/epjc/s10052-019-6904-3},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226938},
  pages     = {1-161},
  year      = {2019},
  abstract  = {We review the physics opportunities of the Future Circular Collider, covering its e(+)e(-), pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions, the top quark and flavour, as well as phenomena beyond the Standard Model. We highlight the synergy and complementarity of the different colliders, which will contribute to a uniquely coherent and ambitious research programme, providing an unmatchable combination of precision and sensitivity to new physics.},
  language  = {en}
}
@article{OPUS4-22692,
  title     = {HE-LHC: The High-Energy Large Hadron Collider : Future Circular Collider Conceptual Design Report Volume 4},
  series = {European Physical Journal - Special Topics},
  volume    = {228},
  journal   = {European Physical Journal - Special Topics},
  number    = {5},
  organization    = {The FCC Collaboration},
  doi       = {10.1140/epjst/e2019-900088-6},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226928},
  pages     = {1109-1382},
  year      = {2019},
  abstract  = {In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered an energy-frontier hadron collider (FCC-hh), a highest-luminosity high-energy lepton collider (FCC-ee), the corresponding 100 km tunnel infrastructure, as well as the physics opportunities of these two colliders, and a high-energy LHC, based on FCC-hh technology. This document constitutes the third volume of the FCC Conceptual Design Report, devoted to the hadron collider FCC-hh. It summarizes the FCC-hh physics discovery opportunities, presents the FCC-hh accelerator design, performance reach, and staged operation plan, discusses the underlying technologies, the civil engineering and technical infrastructure, and also sketches a possible implementation. Combining ingredients from the Large Hadron Collider (LHC), the high-luminosity LHC upgrade and adding novel technologies and approaches, the FCC-hh design aims at significantly extending the energy frontier to 100 TeV. Its unprecedented centre-of-mass collision energy will make the FCC-hh a unique instrument to explore physics beyond the Standard Model, offering great direct sensitivity to new physics and discoveries.},
  language  = {en}
}
@article{OPUS4-22691,
  title     = {FCC-hh: The Hadron Collider: Future Circular Collider Conceptual Design Report Volume 3},
  series = {European Physical Journal - Special Topics},
  volume    = {228},
  journal   = {European Physical Journal - Special Topics},
  organization    = {The FCC Collaboration},
  doi       = {10.1140/epjst/e2019-900087-0},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226917},
  pages     = {755-1107},
  year      = {2019},
  abstract  = {In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered an energy-frontier hadron collider (FCC-hh), a highest-luminosity high-energy lepton collider (FCC-ee), the corresponding 100km tunnel infrastructure, as well as the physics opportunities of these two colliders, and a high-energy LHC, based on FCC-hh technology. This document constitutes the third volume of the FCC Conceptual Design Report, devoted to the hadron collider FCC-hh. It summarizes the FCC-hh physics discovery opportunities, presents the FCC-hh accelerator design, performance reach, and staged operation plan, discusses the underlying technologies, the civil engineering and technical infrastructure, and also sketches a possible implementation. Combining ingredients from the Large Hadron Collider (LHC), the high-luminosity LHC upgrade and adding novel technologies and approaches, the FCC-hh design aims at significantly extending the energy frontier to 100TeV. Its unprecedented centre of-mass collision energy will make the FCC-hh a unique instrument to explore physics beyond the Standard Model, offering great direct sensitivity to new physics and discoveries.},
  language  = {en}
}
@article{OPUS4-22690,
  title     = {Search for diboson resonances in hadronic final states in 139 fb\(^{-1}\) of \(pp\) collisions at √\(s\)=13 TeV with the ATLAS detector},
  series = {Journal of High Energy Physics},
  volume    = {09},
  journal   = {Journal of High Energy Physics},
  number    = {91},
  organization    = {The ATLAS Collaboration},
  doi       = {10.1007/JHEP09(2019)091},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226905},
  pages     = {1-42},
  year      = {2019},
  abstract  = {Narrow resonances decaying into WW, WZ or ZZ boson pairs are searched for in 139 fb(-1) of proton-proton collision data at a centre-of-mass energy of root s = 13TeV recorded with the ATLAS detector at the Large Hadron Collider from 2015 to 2018. The diboson system is reconstructed using pairs of high transverse momentum, large-radius jets. These jets are built from a combination of calorimeter- and tracker-inputs compatible with the hadronic decay of a boosted W or Z boson, using jet mass and substructure properties. The search is performed for diboson resonances with masses greater than 1.3TeV. No significant deviations from the background expectations are observed. Exclusion limits at the 95\% confidence level are set on the production cross-section times branching ratio into dibosons for resonances in a range of theories beyond the Standard Model, with the highest excluded mass of a new gauge boson at 3.8TeV in the context of mass-degenerate resonances that couple predominantly to gauge bosons.},
  language  = {en}
}
@article{OPUS4-22681,
  title     = {Identification of boosted Higgs bosons decaying into \(b\)-quark pairs with the ATLAS detector at 13 TeV},
  series = {European Physical Journal C},
  volume    = {79},
  journal   = {European Physical Journal C},
  number    = {836},
  organization    = {The ATLAS Collaboration},
  doi       = {10.1140/epjc/s10052-019-7335-x},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226812},
  pages     = {1-38},
  year      = {2019},
  abstract  = {This paper describes a study of techniques for identifying Higgs bosons at high transverse momenta decaying into bottom-quark pairs, H -> b (b) over bar, for proton-proton collision data collected by the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy root s = 13 TeV. These decays are reconstructed from calorimeter jets found with the anti-k(t) R = 1.0 jet algorithm. To tag Higgs bosons, a combination of requirements is used: b-tagging of R = 0.2 track-jets matched to the large-R calorimeter jet, and requirements on the jet mass and other jet substructure variables. The Higgs boson tagging efficiency and corresponding multijet and hadronic top-quark background rejections are evaluated using Monte Carlo simulation. Several benchmark tagging selections are defined for different signal efficiency targets. The modelling of the relevant input distributions used to tag Higgs bosons is studied in 36 fb(-1) of data collected in 2015 and 2016 using g -> b (b) over bar and Z(-> b (b) over bar)gamma event selections in data. Both processes are found to be well modelled within the statistical and systematic uncertainties.},
  language  = {en}
}
@article{OPUS4-22682,
  title     = {Measurement of the inclusive cross-section for the production of jets in association with a \(Z\) boson in proton-proton collisions at 8 TeV using the ATLAS detector},
  series = {European Physical Journal C},
  volume    = {79},
  journal   = {European Physical Journal C},
  number    = {847},
  organization    = {The ATLAS Collaboration},
  doi       = {10.1140/epjc/s10052-019-7321-3},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226821},
  pages     = {1-47},
  year      = {2019},
  abstract  = {The inclusive cross-section for jet production in association with a Z boson decaying into an electronpositron pair is measured as a function of the transverse momentum and the absolute rapidity of jets using 19.9 fb(-1) of root s = 8 TeV proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider. The measured Z + jets cross-section is unfolded to the particle level. The cross-section is compared with state-of-the-art Standard Model calculations, including the next-to-leading-order and next-to-next-to-leading-order perturbative QCD calculations, corrected for non-perturbative and QED radiation effects. The results of the measurements cover final-state jets with transverse momenta up to 1 TeV, and show good agreement with fixed-order calculations.},
  language  = {en}
}
@article{OPUS4-22685,
  title     = {Measurement of the cross-section and charge asymmetry of W bosons produced in proton-proton collisions at √\(s\)=8 TeV with the ATLAS detector},
  series = {European Physical Journal C},
  volume    = {79},
  journal   = {European Physical Journal C},
  number    = {760},
  organization    = {The ATLAS Collaboration},
  doi       = {10.1140/epjc/s10052-019-7199-0},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226850},
  pages     = {1-25},
  year      = {2019},
  abstract  = {This paper presents measurements of the W+->mu+nu and W-->mu-nu cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton-proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2fb(-1). The precision of the cross-section measurements varies between 0.8 and 1.5\% as a function of the pseudorapidity, excluding the 1.9\% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.},
  language  = {en}
}
@article{OPUS4-22688,
  title     = {Measurement of distributions sensitive to the underlying event in inclusive Z boson production in \(pp\) collisions at √\(s\)=13 TeV with the ATLAS detector},
  series = {European Physical Journal C},
  volume    = {79},
  journal   = {European Physical Journal C},
  number    = {666},
  organization    = {The ATLAS Collaboration},
  doi       = {10.1140/epjc/s10052-019-7162-0},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226883},
  pages     = {1-31},
  year      = {2019},
  abstract  = {This paper presents measurements of charged-particle distributions sensitive to the properties of the underlying event in events containing a Z boson decaying into a muon pair. The data were obtained using the ATLAS detector at the LHC in proton-proton collisions at a centre-of-mass energy of 13 TeV with an integrated luminosity of 3.2 fb(-1). Distributions of the charged-particle multiplicity and of the charged-particle transverse momentum are measured in regions of the azimuth defined relative to the Z boson direction. The measured distributions are compared with the predictions of various Monte Carlo generators which implement different underyling event models. The Monte Carlo model predictions qualitatively describe the data well, but with some significant discrepancies.},
  language  = {en}
}
@article{OPUS4-22689,
  title     = {Observation of Light-by-Light Scattering in Ultraperipheral Pb + Pb Collisions with the ATLAS Detector},
  series = {Physical Review Letters},
  volume    = {123},
  journal   = {Physical Review Letters},
  organization    = {The ATLAS Collaboration},
  doi       = {10.1103/PhysRevLett.123.052001},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226892},
  pages     = {1-21},
  year      = {2019},
  abstract  = {This Letter describes the observation of the light-by-light scattering process, gamma gamma -> gamma gamma, in Pb + Pb collisions at root S-NN = 5.02 TeV. The analysis is conducted using a data sample corresponding to an integrated luminosity of 1.73 nb(-1), collected in November 2018 by the ATLAS experiment at the LHC. Light-by-light scattering candidates are selected in events with two photons produced exclusively, each with transverse energy E-T(gamma) > 3 GeV and pseudorapidity vertical bar eta(gamma)vertical bar < 2.4, diphoton invariant mass above 6 GeV, and small diphoton transverse momentum and acoplanarity. After applying all selection criteria, 59 candidate events are observed for a background expectation of 12 +/- 3 events. The observed excess of events over the expected background has a significance of 8.2 standard deviations. The measured fiducial cross section is 78 +/- 13(stat) +/- 7(syst) +/- 3(lumi) nb.},
  language  = {en}
}
@article{OPUS4-22683,
  title     = {Search for a heavy charged boson in events with a charged lepton and missing transverse momentum from \(pp\) collisions at √\(s\)=13 TeV with the ATLAS detector},
  series = {Physical Review D},
  volume    = {100},
  journal   = {Physical Review D},
  organization    = {The ATLAS Collaboration},
  doi       = {10.1103/PhysRevD.100.052013},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226835},
  pages     = {1-29},
  year      = {2019},
  abstract  = {A search for a heavy charged-boson resonance decaying into a charged lepton (electron or muon) and a neutrino is reported. A data sample of 139 fb(-1) of proton-proton collisions at root s = 13 TeV collected with the ATLAS detector at the LHC during 2015-2018 is used in the search. The observed transverse mass distribution computed from the lepton and missing transverse momenta is consistent with the distribution expected from the Standard Model, and upper limits on the cross section for pp -> W'-> lv are extracted (l = e or mu). These vary between 1.3 pb and 0.05 tb depending on the resonance mass in the range between 0.15 and 7.0 TeV at 95\% confidence level for the electron and muon channels combined. Gauge bosons with a mass below 6.0 and 5.1 TeV are excluded in the electron and muon channels, respectively, in a model with a resonance that has couplings to fermions identical to those of the Standard Model W boson. Cross-section limits are also provided for resonances with several fixed Gamma/m values in the range between 1\% and 15\%. Model-independent limits are derived in single-bin signal regions defined by a varying minimum transverse mass threshold. The resulting visible cross-section upper limits range between 4.6 (15) ph and 22 (22) ab as the threshold increases from 130 (110) GeV to 5.1 (5.1) TeV in the electron (muon) channel.},
  language  = {en}
}