Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at 
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 with the ATLAS detector

Aaboud, M.; Bergeås, Elin Kuutmann; Bokan, P.; Brenner, R.; Ekelöf, T.; Ellert, M.; Ferrari, A.; Gradin, Joakim; Maddocks, H. J.; Martensson, M. U. F; Öhman, H.; Rangel-Smith, C.; Pedro, R.; Zwalinski, L.

doi:10.1103/physrevd.96.072002

Cited by 226 publications

(174 citation statements)

References 36 publications

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“…The data and MC simulations agree well (see Fig. 6), the jet energy scale is consistent [7] with MC predictions, and the jet energy resolution is below 10% for p T >100 GeV. The constant term agree with the expected value of 3%.…”

Section: Performancesupporting

confidence: 73%

Performance of the ATLAS Hadronic Tile Calorimeter in Run-2 and its Upgrade for the High Luminosity LHC

Solovyanov

2017

EPJ Web Conf.

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Abstract. The Tile Calorimeter (TileCal) of the ATLAS experiment at the LHC is the central hadronic calorimeter designed for energy reconstruction of hadrons, jets, tauparticles and missing transverse energy. TileCal is a scintillator-steel sampling calorimeter and it covers the region of pseudo-rapidity up to 1.7, with almost 10000 channels measuring energies ranging from ∼30 MeV to ∼2 TeV. Each stage of the signal production, from scintillation light to the signal reconstruction, is monitored and calibrated.The performance of the Tile calorimeter has been studied in-situ employing cosmic ray muons and a large sample of proton-proton collisions, acquired during the operations of the LHC. Prompt isolated muons of high momentum from electroweak bosons decays are employed to study the energy response of the calorimeter at the electromagnetic scale. The calorimeter response to hadronic particles is evaluated with a sample of isolated hadrons. The modelling of the response by the Monte Carlo simulation is discussed. The calorimeter timing calibration and resolutions are studied with a sample of multijets events. Results on the calorimeter operation and performance are presented, including the calibration, stability, absolute energy scale, uniformity and time resolution. TileCal performance satisfies the design requirements and has provided an essential contribution to physics results in ATLAS.The Large Hadron Collider (LHC) has envisaged a series of upgrades towards a High Luminosity LHC (HL-LHC), delivering five times the LHC nominal instantaneous luminosity. The ATLAS Phase II upgrade, in 2024, will accommodate the detector and data acquisition system for the HL-LHC. In particular, the Tile Calorimeter will undergo a major replacement of its on-and off-detector electronics. All signals will be digitised and then transferred directly to the off-detector electronics, where the signals will be reconstructed, stored, and sent to the first level of trigger at a rate of 40 MHz. This will provide better precision for the calorimeter signals used by the trigger system and will allow the development of more complex trigger algorithms. Changes to the electronics will also contribute to the reliability and redundancy of the system. Three different front-end options are presently being investigated for the upgrade. Results of extensive laboratory tests and with beams of the three options will be presented, as well as the latest results on the development of the power distribution and the off-detector electronics.

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Section: Performancesupporting

confidence: 73%

Performance of the ATLAS Hadronic Tile Calorimeter in Run-2 and its Upgrade for the High Luminosity LHC

Solovyanov

2017

EPJ Web Conf.

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“…Their calibration is based on simulation with additional corrections obtained using in situ techniques [86] to account for differences between simulation and data. Jets are required to satisfy p T > 25 GeV and jηj < 2.5.…”

Section: Object Reconstruction and Identificationmentioning

confidence: 99%

“…The total jet uncertainty varies from 1.0% to 5.5% depending on the jet p T . The largest impact of experimental uncertainties on the signal strength μ ¼ σ ttH;obs =σ ttH;SM arises from the jet energy scale, in particular, contributions from the different responses to quark and gluon jets, pileup subtraction, and in situ calibration in data [86].…”

Section: Systematic Uncertaintiesmentioning

confidence: 99%

Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

Aaboud¹,

Aad²,

Abbott³

et al. 2018

Phys. Rev. D

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116

120

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A search for the associated production of the Higgs boson with a top quark pair (ttH) is reported. The search is performed in multilepton final states using a data set corresponding to an integrated luminosity of 36.1 fb −1 of proton-proton collision data recorded by the ATLAS experiment at a center-of-mass energy ffiffi ffi s p ¼ 13 −50 fb. The combination of this result with other ttH searches from the ATLAS experiment using the Higgs boson decay modes to bb, γγ and ZZ Ã → 4l, has an observed significance of 4.2 standard deviations, compared to an expectation of 3.8 standard deviations. This provides evidence for the ttH production mode.

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“…The effect of multiple interactions per proton bunch crossing (pileup) is accounted for using the jet area method [81,82]. Subsequent calibrations are applied to the reconstructed jet to improve the energy resolution [83,84]. The residual contamination by pileup jets is further suppressed using a multivariate discriminant that estimates the compatibility of the jet with the PV, as detailed in Ref.…”

Section: Event Reconstructionmentioning

confidence: 99%

Search for squarks and gluinos in events with an isolated lepton, jets, and missing transverse momentum at s=13 TeV with the ATLAS detector

Aaboud¹,

Aad²,

Abbott³

et al. 2017

Phys. Rev. D

Self Cite

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The results of a search for squarks and gluinos in final states with an isolated electron or muon, multiple jets and large missing transverse momentum using proton-proton collision data at a center-of-mass energy of ffiffi ffi s p ¼ 13 TeV are presented. The data set used was recorded during 2015 and 2016 by the ATLAS experiment at the Large Hadron Collider and corresponds to an integrated luminosity of 36.1 fb −1 . No significant excess beyond the expected background is found. Exclusion limits at 95% confidence level are set in a number of supersymmetric scenarios, reaching masses up to 2.1 TeV for gluino pair production and up to 1.25 TeV for squark pair production.

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Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at s=13 TeV with the ATLAS detector

Cited by 226 publications

References 36 publications

Performance of the ATLAS Hadronic Tile Calorimeter in Run-2 and its Upgrade for the High Luminosity LHC

Performance of the ATLAS Hadronic Tile Calorimeter in Run-2 and its Upgrade for the High Luminosity LHC

Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector

Search for squarks and gluinos in events with an isolated lepton, jets, and missing transverse momentum at s=13 TeV with the ATLAS detector

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