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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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Corrections for five figures and six tables are noted for the paper, which do not affect the conclusions reported.
In the published HTML version of this article, the affiliations of the authors of the National Research Nuclear University MEPhI, Moscow, Russia were unfortunately marked incorrectly.
In the original HTML version of this article, one affiliation of the author V. O. Tikhomirov was missing. He is affiliated to the following two affiliations: P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia and National Research Nuclear University MEPhI, Moscow, Russia. The original article has been corrected.
When quoting the final cross section result in the text of the paper (Eur. Phys. J. C 80 (2020) 957), the theory component of the uncertainty was incorrectly set to 0.04 pb while the correct value of 0.03 pb was given in Table 8 and in all other results reported in this paper.
A correction to this paper has been published: 10.1140/epjc/s10052-021-09344-w
One correction is noted for the paper. The branching fraction ($\mathcal{B}$($W →{ℓv}$) = 0.3246 was not included in the conversion of the observed cross-section limit, σ x $\mathcal{B}$( $t →Wb$) x ($\mathcal{B}$($W →{ℓv}$) < 2.9to the coupling constants $κ_{ugt}$ and $κ_{cgt}$ and the branching fractions $\mathcal{B}$( $t →ug$) and $\mathcal{B}$( $t →cg$). The inclusion leads to weaker observed exclusion limits on the coupling constants divided by the scale of new physics of $k_{ugt}$/ Λ <10 x 10 -3 TeV -1 and $k_{cgt}$/Λ <23 x 10 -3 TeV -1 and on the branching fractions $\mathcal{B}$( $t →ug$) < 1.2 x10 -4 and $\mathcal{B}$( $t →cg$) < 6.4 x 10 -4 . The predicted exclusion limits on the coupling constants divided by the scale of new physics are $k_{ugt}$/ Λ < 9.5 x 10 -3 TeV -1 and $\mathcal{B}$( $t →cg$)/ Λ < 22 x 10 -3 TeV -1 and on the branching fractions $\mathcal{B}$( $t →ug$) < 1.1 x 10 -4 and $\mathcal{B}$( $t →cg$) < 5.7 x 10 -4 . Updated distributions of the observed upper limits on the coupling constants for combinations of cgt and ugt channels are shown in Figure 10a and on the branching fractions in Figure 10b.
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A search for a pseudoscalar a produced in association with a top-quark pair, or in association with a single top quark plus a W boson, with the pseudoscalar decaying into b-quarks $(a → b\bar{b})$, is performed using the full Run 2 data sample using a dileptonic decay mode signature. The search covers pseudoscalar boson masses between 12 and 100 GeV and involves both the kinematic regime where the decay products of the pseudoscalar are reconstructed as two standard b-tagged small-radius jets, or merged into a large-radius jet due to its Lorentz boost. No significant excess relative to expectations is observed. Assuming a branching ratio BR$(a → b\bar{b})$ = 100%, the range of pseudoscalar masses between 50 and 80 GeV is excluded at 95% confidence level for a coupling of the pseudoscalar to the top quark of 0.5, while a coupling of 1.0 is excluded at 95% confidence level for the masses considered, with the coupling defined as the strength modifier of the Standard Model Yukawa coupling.
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CERN-LHC. An inclusive search for SUSY in proton-proton collisions at a centre-of-mass energy of 7 TeV in final states with jets, missing transverse momentum and one or more isolated electron and/or muons. The search is based on data from the full 2011 data taking period with a total integrated luminosity of 4.7 fb-1. Single- and multi-lepton channels are treated together in the one analysis. The grid below gives access to the acceptance*efficiencies, 95% CLs, signal cross sections and number of generated events for 3 models, mSUGRA, GMSB and a simplified model with gluino pair production one-step decays.
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CERN-LHC. Measurements of cross sections for final states containing a W boson and hadronic jets in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data is from the full 2010 sample with a total integrated luminosity of 36 pb^{-1}. Cross sections are measured in both the electron and muon decay modes of the W and are presented as a function of inclusive jet multiplicity up to five jets. For each multiplicity, cross sections are determined as a function of (1) each jet PT, (2) the scalar sum (HT) of the PT of the charged lepton, missing PT and all jets, (3) the invariant mass of the jets and (4) rapidity distributions of various combinations of leptons and jets. The results are corrected for all detector effects and all known backgrounds. Comparative results are also shown for particle-level predicitions from ALPGEN, SHERPA and BLACKHAT-SHERPA. A separate link gives the Non-Perturbative and QED correction for each table.
CERN-LHC. Results of a search for narrow resonances in like-sign lepton pairs produced in proton-proton collisions at a centre-of-mass energy of 7 TeV using data with a total integrated luminosity of 4.7 fb-1. No significant excess is seen over Standard Model expectations and upper limits for the masses of doubly-charged Higgs bosons coupling to left- and right-handed fermions are determined as functions of their branching ratios to like-sign lepton pairs.
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CERN-LHC. Search for new phenomena in events with a final state containing an energetic photon and large missing transverse momentum in proton-proton collisions at a centre-of-mass energy off 7 TeV. The data were collected during 2011 and have a total integrated luminosity of 4.6 fb-1. Agreement with Standard Model predictions is found to be good with an observed number of events in the data compared with a predicted number of 137.