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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 1,495 records · Page 83
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DOE OSTI2014

Fiducial and differential cross sections of Higgs boson production measured in the four-lepton decay channel in p p collisions at s =8 TeV with the ATLAS detector

CERN-LHC. Measurements of fiducial and differential cross sections of Higgs boson production in the H->ZZ*->4l channel in proton-proton collisions at a centre-of-mass energy of 8 TeV with 20.3 fb^-1 of data collected in 2012. The final states used are 4 electrons, 4 muons, 2 electrons and 2 muons.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2017

Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb − 1 of s = 13 TeV pp collision data with the ATLAS detector

CERN-LHC. The results of a search for the direct pair production of stops, the supersymmetric partner of the top-quark, in final states with one isolated electron or muon, several energetic jets, and missing transverse momentum are reported. The search uses data from pp collisions delivered by the Large Hadron Collider in 2015 and 2016 at a center-of-mass energy of 13 TeV and recorded by the ATLAS detector, corresponding to an integrated luminosity of 36.1/fb. A wide range of signal scenarios with different mass splittings between the stop, the lightest neutralino and possible intermediate gauginos or higgsinos is considered, including cases where the W-bosons or the top-quarks are off-shell. The analysis also targets the production of dark matter in association with a pair of top-quarks using the same final state. No significant excess over the Standard Model prediction is observed. The null results are used to set exclusion limits at 95% confidence level in several benchmark models, which reach up to a stop mass of 940 GeV. Stringent exclusion limits are also derived for all other considered stop decay scenarios, and upper limits are set on the visible cross-section for processes beyond the Standard Model.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2017

Measurement of τ polarisation in Z / γ ∗ → τ τ decays in proton-proton collisions at s = 8 TeV with the ATLAS detector

CERN-LHC. Measurement of tau lepton polarisation in Z-boson decays in proton-proton collisions at centre-of-mass energy of 8 TeV with 20.2 fb^-1 of data from 2012. The measurement is done in electron-hadron and muon-hadron decay channels of tau lepton pairs in a fiducial region resembling kinematical acceptance of the analysis and is extracted over the full phase-space within Z-boson mass range from 66 to 116 GeV. See: arXiv:1709.03490 [hep-ex].

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2017

Measurement of inclusive and differential cross sections in the H → Z Z ∗ → 4 ℓ decay channel in p p collisions at s = 13 TeV with the ATLAS detector

CERN-LHC. Measurements of fiducial and differential cross sections of Higgs boson production in the H->ZZ*->4l channel in proton-proton collisions at a centre-of-mass energy of 13 TeV with 36.1 fb^-1 of data collected in 2015 and 2016. The final states used are 4 electrons, 4 muons, 2 electrons and 2 muons.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2017

Search for new phenomena in events with missing transverse momentum and a Higgs boson decaying into two photons at s = 13 TeV with the ATLAS detector

CERN-LHC. A search for dark matter in association with a Higgs boson decaying to two photons. The final state is two photon plus missing transverse energy. The photons are defined with pT threshold of 0.35*m_yy and 0.25*m_yy for the leading and subleading photon, with the pseudo-rapidity |eta|<2.37. The events are categorized into mono-Higgs, high MET, intermediate MET categories. The mono-Higgs category requires the MET significance, defined by MET/sqrt(sumEt), to be greater than 7 and the diphoton pT larger than 90 GeV. The high MET category is MET significance greater than 5.5 and the intermediate MET category is MET significance greater than 4. Each category exclude the previous higher category. 1 unit of the MET significance is roughtly 20 GeV.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2016

Measurement of the inclusive cross-sections of single top-quark and top-antiquark t -channel production in p p collisions at s = 13 TeV with the ATLAS detector

CERN-LHC. A measurement of the t-channel single-top-quark and single-top-antiquark production cross-sections in the lepton+jets channel is presented, using 3.2 fb^-1 of proton-proton collision data at a centre-of-mass energy of 13 TeV, recorded with the ATLAS detector at the LHC in 2015.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2018

Search for W &#x2032; &#x2192; t b decays in the hadronic final state using pp collisions at s = 13 TeV with the ATLAS detector

CERN-LHC. A search for W'-boson production in the W'->tb -> qq'bb decay channel is presented using 36.1 fb^{-1} of 13 TeV proton–proton collision data collected by the ATLAS detector at the Large Hadron Collider in 2015 and 2016. The search is interpreted in terms of both a left-handed and right-handed chiral W' boson within the mass range 1–5 TeV. Identification of the hadronically decaying top quark is performed using jet substructure tagging techniques base on a shower deconstruction algorithm. No significant deviation from the Standard Model prediction is observed and the results are expressed as upper limits on the W'-> tb production cross-section times branching ratio as a function of the W'-boson mass. These limits exclude W' bosons with right-handed couplings with masses below 3.0 TeV and W' bosons with left-handed couplngs with masses below 2.9 TeV, at the 95% confidence level.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2018

Search for a heavy Higgs boson decaying into a Z boson and another heavy Higgs boson in the &#x2113; &#x2113; b b final state in p p collisions at s = 13 TeV with the ATLAS detector

CERN-LHC. Search for a heavy Higgs boson decaying into a Z boson and another heavy Higgs boson in the llbb final state in pp collisions at sqrt(s)=13 TeV with the ATLAS detector. Data used 36 /fb. The final state contains electron-electron-b-b or muon-muon-b-b. A summary of the selection criteria is given in Table 1, page 6 of the preprint.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2018

Search for heavy resonances decaying to a photon and a hadronically decaying Z / W / H boson in p p collisions at s = 13 TeV with the ATLAS detector

CERN-ATLAS. Search for heavy resonances decaying to a photon and a hadronically decaying Z/W/H boson in pp collisions at sqrt{s} = 13 TeV with the ATLAS detector. Many extensions of the Standard Model predict new resonances decaying to a Z, W, or Higgs boson and a photon. This paper presents a search for such resonances produced in pp collision at sqrt{s}=13 TeV using a dataset with an integrated luminosity of 36.1/fb collected by the ATLAS detector at the Large Hadron Collider. The Z/W/H bosons are identified through their decays to hadrons. The data are found to be consistent with the Standard Model expectation in the entire investigated mass range. Upper limits are set on the production cross section times branching fraction for resonance decays to Z/W+gamma in the mass range from 1.0 to 6.8 TeV, and for the first time into H+gamma in the mass range from 1.0 to 3.0 TeV.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗