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24,699 Research products, page 1 of 2,470

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  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    C_N^sub(eta_1, eta_2) for Pb+Pb, pT>0.2GeV, (160<=Nch<180) No data abstract available.

  • English
    Authors: 
    Mills, Michelle B.; Michalowicz, Carolyn A.; Song, Ellen; Maahs, Adam C.; Newman, Julia A.; Cawte, Taylr; Lovnicki, Jessica M.; Soldatov, Dmitriy V.; Preuss, Kathryn E.;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    Related Article: Michelle B. Mills, Carolyn A. Michalowicz, Ellen Song, Adam C. Maahs, Julia A. Newman, Taylr Cawte, Jessica M. Lovnicki, Dmitriy V. Soldatov, Kathryn E. Preuss|2021|Cryst.Growth Des.|21|5897|doi:10.1021/acs.cgd.1c00791

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    CERN-LHC. A search for electroweak production of supersymmetric particles is performed in two-lepton and three-lepton final states using recursive jigsaw reconstruction. The search uses data collected in 2015 and 2016 by the ATLAS experiment in $\sqrt{s}$ = 13 TeV proton--proton collisions at the CERN Large Hadron Collider corresponding to an integrated luminosity of 36.1 $\textrm{fb}^{-1}$. Chargino--neutralino pair production, with decays via $W/Z$ bosons, is studied in final states involving leptons and jets and missing transverse momentum for scenarios with large and intermediate mass-splittings between the parent particle and lightest supersymmetric particle, as well as for the scenario where this mass splitting is close to the mass of the $Z$ boson. The latter case is challenging since the vector bosons are produced with kinematic properties that are similar to those in Standard Model processes. Results are found to be compatible with the Standard Model expectations in the signal regions targeting large and intermediate mass-splittings, and chargino--neutralino masses up to 600 GeV are excluded at 95% confidence level for a massless lightest supersymmetric particle. Excesses of data above the expected background are found in the signal regions targeting low mass-splittings, and the largest local excess amounts to 3.0 standard deviations. Distributions of kinematic variables in the signal regions for the $2\ell$ channels after applying all selection requirements. The histograms show the post-fit background predictions. The last bin includes the overflow. The distribution for $R_{\textrm{ISR}}$ in SR$2\ell$_ISR is plotted. The expected distribution for a benchmark signal model, normalized to the NLO+NLL cross-section times integrated luminosity, is also shown for comparison.

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    Measurements of the top--antitop quark pair production charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of 20.3 $fb^{-1}$ from pp collisions at a center-of-mass energy of $\sqrt{s}=8\,$ TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the $t\bar{t}$ system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: $A_{ll}^{C}$ based on the selected leptons and $A_{t\bar{t}}^C$ based on the reconstructed $t\bar{t}$ final state. The inclusive asymmetries are measured in the full phase space to be $A_{ll}^{C} =0.008 \pm 0.006$ and $A_{t\bar{t}}^C = 0.021 \pm 0.016$, which are in agreement with the Standard Model predictions of $A_{ll}^{C} = 0.0064 \pm 0.0003$ and $A_{t\bar{t}}^C = 0.0111 \pm 0.0004$. The top-antitop inclusive asymmetry in the fiducial volume.

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    SRC for p+Pb, pT>0.2GeV, opposite pairs No data abstract available.

  • English
    Authors: 
    Yu, Xin; Roemmele, Tracey L.; Boeré, René T.;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures. Related Article: Xin Yu, Tracey L. Roemmele and René T. Boeré|2018|ChemElectroChem|5|968|doi:10.1002/celc.201701191

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    CERN-LHC. Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet-quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in sNN=5.02 TeV Pb+Pb and pp collisions, using the ATLAS detector at the LHC. The Pb+Pb and pp data sets have integrated luminosities of 0.49 nb−1 and 25 pb−1, respectively. The measurement is performed for jets reconstructed with the anti-kt algorithm with radius parameter R=0.4 and is extended to an angular distance of r=0.8 from the jet axis. Results are presented as a function of Pb+Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1−63 GeV range, matched to jets with transverse momenta in the 126−316 GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r=0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb+Pb collisions in the jet core for angular distances up to r=0.05 from the jet axis, with a suppression at larger distances. R_D(pT,r) The ratios of charged particle distributions around jets as a function of distance from the jet axis in different centrality intervals of PbPb and pp collisions at 5.02 TeV for different track pT and jet pT ranges.

  • English
    Authors: 
    Liang, Qiuming; Hayashi, Kasumi; Zeng, Yimin; Jimenez-Santiago, Jose L.; Song, Datong;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    Related Article: Qiuming Liang, Kasumi Hayashi, Yimin Zeng, Jose L. Jimenez-Santiago, Datong Song|2021|Chem.Commun.|57|6137|doi:10.1039/D1CC02245H

  • English
    Authors: 
    Mellerup, Soren K.; Häfele, Lisa; Lorbach, Andreas; Wang, Xiang; Wang, Suning;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures. Related Article: Soren K. Mellerup, Lisa Häfele, Andreas Lorbach, Xiang Wang, and Suning Wang|2017|Org.Lett.|19|3851|doi:10.1021/acs.orglett.7b01724

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    SRC(eta_1, eta_2) for p+Pb, pT>0.5GeV, (100<=Nch<120) No data abstract available.

search
Include:
The following results are related to Canada. Are you interested to view more results? Visit OpenAIRE - Explore.
24,699 Research products, page 1 of 2,470
  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    C_N^sub(eta_1, eta_2) for Pb+Pb, pT>0.2GeV, (160<=Nch<180) No data abstract available.

  • English
    Authors: 
    Mills, Michelle B.; Michalowicz, Carolyn A.; Song, Ellen; Maahs, Adam C.; Newman, Julia A.; Cawte, Taylr; Lovnicki, Jessica M.; Soldatov, Dmitriy V.; Preuss, Kathryn E.;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    Related Article: Michelle B. Mills, Carolyn A. Michalowicz, Ellen Song, Adam C. Maahs, Julia A. Newman, Taylr Cawte, Jessica M. Lovnicki, Dmitriy V. Soldatov, Kathryn E. Preuss|2021|Cryst.Growth Des.|21|5897|doi:10.1021/acs.cgd.1c00791

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    CERN-LHC. A search for electroweak production of supersymmetric particles is performed in two-lepton and three-lepton final states using recursive jigsaw reconstruction. The search uses data collected in 2015 and 2016 by the ATLAS experiment in $\sqrt{s}$ = 13 TeV proton--proton collisions at the CERN Large Hadron Collider corresponding to an integrated luminosity of 36.1 $\textrm{fb}^{-1}$. Chargino--neutralino pair production, with decays via $W/Z$ bosons, is studied in final states involving leptons and jets and missing transverse momentum for scenarios with large and intermediate mass-splittings between the parent particle and lightest supersymmetric particle, as well as for the scenario where this mass splitting is close to the mass of the $Z$ boson. The latter case is challenging since the vector bosons are produced with kinematic properties that are similar to those in Standard Model processes. Results are found to be compatible with the Standard Model expectations in the signal regions targeting large and intermediate mass-splittings, and chargino--neutralino masses up to 600 GeV are excluded at 95% confidence level for a massless lightest supersymmetric particle. Excesses of data above the expected background are found in the signal regions targeting low mass-splittings, and the largest local excess amounts to 3.0 standard deviations. Distributions of kinematic variables in the signal regions for the $2\ell$ channels after applying all selection requirements. The histograms show the post-fit background predictions. The last bin includes the overflow. The distribution for $R_{\textrm{ISR}}$ in SR$2\ell$_ISR is plotted. The expected distribution for a benchmark signal model, normalized to the NLO+NLL cross-section times integrated luminosity, is also shown for comparison.

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    Measurements of the top--antitop quark pair production charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of 20.3 $fb^{-1}$ from pp collisions at a center-of-mass energy of $\sqrt{s}=8\,$ TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the $t\bar{t}$ system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: $A_{ll}^{C}$ based on the selected leptons and $A_{t\bar{t}}^C$ based on the reconstructed $t\bar{t}$ final state. The inclusive asymmetries are measured in the full phase space to be $A_{ll}^{C} =0.008 \pm 0.006$ and $A_{t\bar{t}}^C = 0.021 \pm 0.016$, which are in agreement with the Standard Model predictions of $A_{ll}^{C} = 0.0064 \pm 0.0003$ and $A_{t\bar{t}}^C = 0.0111 \pm 0.0004$. The top-antitop inclusive asymmetry in the fiducial volume.

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    SRC for p+Pb, pT>0.2GeV, opposite pairs No data abstract available.

  • English
    Authors: 
    Yu, Xin; Roemmele, Tracey L.; Boeré, René T.;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures. Related Article: Xin Yu, Tracey L. Roemmele and René T. Boeré|2018|ChemElectroChem|5|968|doi:10.1002/celc.201701191

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    CERN-LHC. Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet-quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in sNN=5.02 TeV Pb+Pb and pp collisions, using the ATLAS detector at the LHC. The Pb+Pb and pp data sets have integrated luminosities of 0.49 nb−1 and 25 pb−1, respectively. The measurement is performed for jets reconstructed with the anti-kt algorithm with radius parameter R=0.4 and is extended to an angular distance of r=0.8 from the jet axis. Results are presented as a function of Pb+Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1−63 GeV range, matched to jets with transverse momenta in the 126−316 GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r=0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb+Pb collisions in the jet core for angular distances up to r=0.05 from the jet axis, with a suppression at larger distances. R_D(pT,r) The ratios of charged particle distributions around jets as a function of distance from the jet axis in different centrality intervals of PbPb and pp collisions at 5.02 TeV for different track pT and jet pT ranges.

  • English
    Authors: 
    Liang, Qiuming; Hayashi, Kasumi; Zeng, Yimin; Jimenez-Santiago, Jose L.; Song, Datong;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    Related Article: Qiuming Liang, Kasumi Hayashi, Yimin Zeng, Jose L. Jimenez-Santiago, Datong Song|2021|Chem.Commun.|57|6137|doi:10.1039/D1CC02245H

  • English
    Authors: 
    Mellerup, Soren K.; Häfele, Lisa; Lorbach, Andreas; Wang, Xiang; Wang, Suning;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures. Related Article: Soren K. Mellerup, Lisa Häfele, Andreas Lorbach, Xiang Wang, and Suning Wang|2017|Org.Lett.|19|3851|doi:10.1021/acs.orglett.7b01724

  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    SRC(eta_1, eta_2) for p+Pb, pT>0.5GeV, (100<=Nch<120) No data abstract available.