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46,878 Research products, page 1 of 4,688

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

    - CERN-LHC. This article presents measurements of the $t$-channel single top-quark $(t)$ and top-antiquark $(\bar t)$ total production cross sections $\sigma(tq)$ and $\sigma(\bar tq)$, their ratio $R_{t}=\sigma(tq)/\sigma(\bar tq)$, and a measurement of the inclusive production cross section $\sigma(tq+\bar tq)$ in proton-proton collisions at $\sqrt{s}~=~7~\mathrm{TeV}$ at the LHC. Differential cross sections for the $tq$ and $\bar tq$ processes are measured as a function of the transverse momentum and the absolute value of the rapidity of $t$ and $\bar t$, respectively. The analyzed data set was recorded with the ATLAS detector and corresponds to an integrated luminosity of $4.59~\mathrm{fb}^{-1}$. Selected events contain one charged lepton, large missing transverse momentum, and two or three jets. The cross sections are measured by performing a binned maximum-likelihood fit to the output distributions of neural networks. The resulting measurements are $\sigma(tq)=46 \pm 1(\mathrm{stat})\pm 6(\mathrm{syst})~\mathrm{pb}$, $\sigma(\bar tq)=23 \pm 1(\mathrm{stat})\pm 3(\mathrm{syst})~\mathrm{pb}$, $R_{t}=2.04 \pm 0.13(\mathrm{stat})\pm 0.12(\mathrm{syst})$, and $\sigma(tq+\bar tq)=68 \pm 2(\mathrm{stat})\pm 8(\mathrm{syst})~\mathrm{pb}$, consistent with the Standard Model expectation. The uncertainty on the measured cross sections is dominated by systematic uncertainties, while the uncertainty on $R_{t}$ is mainly statistical. Using the ratio of $\sigma(tq+\bar tq)$ to its theoretical prediction, and assuming that the top-quark-related CKM matrix elements obey the relation $|V_{tb}|\gg |V_{ts}|$, $|V_{td}|$, we determine $|V_{tb}|=1.02 \pm 0.07$. Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{\mathrm{d}\sigma}{\mathrm{d}|y(t)|}$ distribution given in percent for each bin. The list includes only those uncertainties that contribute with more than $1\%$. The following uncertainties contribute to the total uncertainty with less than $1\%$ to each bin content$:$ JES detector, JES statistical, JES physics modeling, JES mixed detector and modeling, JES close-by jets, JES pileup, JES flavor composition, JES flavor response, jet-vertex fraction, $b/\bar{b}$ acceptance, $E_{\mathrm{T}}^{\mathrm{miss}}$ modeling, $W+$ jets shape variation, $t \bar{t}$ generator, $t \bar{t}$ ISR/FSR, and unfolding. In cases when the uncertainty is report to be "$<1\%$" in the table of the paper the uncertainty is approximated by a value of $0.5\%$.

  • 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. From Fig 9. Delta_D(pT,r) The differences between 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.

  • Research data . Image . 2015
    Open Access
    Authors: 
    University of Alberta Department of Anthropology;
    Publisher: University of Alberta Libraries
    Country: Canada

    1 experimental

  • Open Access
    Authors: 
    Mroue, Abdul; Boyle, Michael; Lovelace, Geoffrey; Szilagyi, Bela; Pfeiffer, Harald; Zenginoglu, Anil; Kidder, Larry; Taylor, Nicholas; Hemberger, Dan; Scheel, Mark;
    Publisher: Zenodo
    Project: NSERC , NSF | Gravitational Radiation a... (1068881), NSF | Collaborative Research: D... (1005655), NSF | Research in Black-Hole Ph... (0969111), NSF | MRI-R2: Acquisition of a ... (0960291), NSF | Collaborative Research: D... (1005426), NSF | FRG: Collaborative Resear... (1065438)

    Simulation of a black-hole binary system evolved by the SpEC code.

  • English
    Authors: 
    Cao, Levy L.; Zhou, Jiliang; Qu, Zheng-Wang; Stephan, Douglas W.;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    Related Article: Levy L. Cao, Jiliang Zhou, Zheng-Wang Qu, Douglas W. Stephan|2019|Angew.Chem.,Int.Ed.|58|18487|doi:10.1002/anie.201912338

  • Open Access
    Authors: 
    Yonghong Zhang; Petropoulos, Sophie; Jinhua Liu; Cheishvili, David; Zhou, Rudy; Dymov, Sergiy; Li, Kang; Li, Ning; Szyf, Moshe;
    Publisher: figshare
    Project: CIHR

    Differentially methylated sites between Stage 4 HCC and healthy controls. (CSV 3562 kb)

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

    No data abstract available. SRC for p+Pb, pT>0.5GeV

  • Research data . Image . 2021 . Embargo End Date: 29 Sep 2021
    Open Access
    Authors: 
    (:Unkn) Unknown;
    Publisher: Electronic version published by Vancouver Island University
    Country: Canada

    Plant, view from 4th floor

  • Authors: 
    Mallen-Ornelas, G.; Seager, S.; H.K.C., Yee; Minniti, D.; Gladders, M.D.; Mallen-Fullerton, G.M.; Brown, T.M.;
    Publisher: Centre de Donnees Strasbourg (CDS)
    Project: NSERC

    VizieR online Data Catalogue associated with article published in journal Astronomical Journal (AAS) with title 'The EXPLORE project. I. A deep search for transiting extrasolar planets.' (bibcode: 2003ApJ...582.1123M)

  • Open Access
    Authors: 
    Kidder, Larry; Lovelace, Geoffrey; Hemberger, Dan; Pfeiffer, Harald; Boyle, Michael; Scheel, Mark; Mroue, Abdul; Taylor, Nicholas; Szilagyi, Bela; Zenginoglu, Anil;
    Publisher: Zenodo
    Project: NSF | MRI-R2: Acquisition of a ... (0960291), NSERC , NSF | Maximizing Scientific Out... (1806665), NSF | Collaborative Research: P... (1713694), NSF | Gravitational Radiation a... (1708213), NSF | FRG: Collaborative Resear... (1065438), NSF | Leadership Class Scientif... (0725070), NSF | Collaborative Research: D... (1005655), NSF | Sustained-Petascale In Ac... (1238993), NWO | Precision Gravity: black ... (29769),...

    Simulation of a black-hole binary system evolved by the SpEC code.

Advanced search in
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
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arrow_drop_down
Include:
The following results are related to Canada. Are you interested to view more results? Visit OpenAIRE - Explore.
46,878 Research products, page 1 of 4,688
  • English
    Authors: 
    ATLAS Collaboration;
    Publisher: HEPData
    Project: NSERC

    - CERN-LHC. This article presents measurements of the $t$-channel single top-quark $(t)$ and top-antiquark $(\bar t)$ total production cross sections $\sigma(tq)$ and $\sigma(\bar tq)$, their ratio $R_{t}=\sigma(tq)/\sigma(\bar tq)$, and a measurement of the inclusive production cross section $\sigma(tq+\bar tq)$ in proton-proton collisions at $\sqrt{s}~=~7~\mathrm{TeV}$ at the LHC. Differential cross sections for the $tq$ and $\bar tq$ processes are measured as a function of the transverse momentum and the absolute value of the rapidity of $t$ and $\bar t$, respectively. The analyzed data set was recorded with the ATLAS detector and corresponds to an integrated luminosity of $4.59~\mathrm{fb}^{-1}$. Selected events contain one charged lepton, large missing transverse momentum, and two or three jets. The cross sections are measured by performing a binned maximum-likelihood fit to the output distributions of neural networks. The resulting measurements are $\sigma(tq)=46 \pm 1(\mathrm{stat})\pm 6(\mathrm{syst})~\mathrm{pb}$, $\sigma(\bar tq)=23 \pm 1(\mathrm{stat})\pm 3(\mathrm{syst})~\mathrm{pb}$, $R_{t}=2.04 \pm 0.13(\mathrm{stat})\pm 0.12(\mathrm{syst})$, and $\sigma(tq+\bar tq)=68 \pm 2(\mathrm{stat})\pm 8(\mathrm{syst})~\mathrm{pb}$, consistent with the Standard Model expectation. The uncertainty on the measured cross sections is dominated by systematic uncertainties, while the uncertainty on $R_{t}$ is mainly statistical. Using the ratio of $\sigma(tq+\bar tq)$ to its theoretical prediction, and assuming that the top-quark-related CKM matrix elements obey the relation $|V_{tb}|\gg |V_{ts}|$, $|V_{td}|$, we determine $|V_{tb}|=1.02 \pm 0.07$. Detailed list of the contribution of each source of uncertainty to the total relative uncertainty on the measured $\dfrac{\mathrm{d}\sigma}{\mathrm{d}|y(t)|}$ distribution given in percent for each bin. The list includes only those uncertainties that contribute with more than $1\%$. The following uncertainties contribute to the total uncertainty with less than $1\%$ to each bin content$:$ JES detector, JES statistical, JES physics modeling, JES mixed detector and modeling, JES close-by jets, JES pileup, JES flavor composition, JES flavor response, jet-vertex fraction, $b/\bar{b}$ acceptance, $E_{\mathrm{T}}^{\mathrm{miss}}$ modeling, $W+$ jets shape variation, $t \bar{t}$ generator, $t \bar{t}$ ISR/FSR, and unfolding. In cases when the uncertainty is report to be "$<1\%$" in the table of the paper the uncertainty is approximated by a value of $0.5\%$.

  • 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. From Fig 9. Delta_D(pT,r) The differences between 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.

  • Research data . Image . 2015
    Open Access
    Authors: 
    University of Alberta Department of Anthropology;
    Publisher: University of Alberta Libraries
    Country: Canada

    1 experimental

  • Open Access
    Authors: 
    Mroue, Abdul; Boyle, Michael; Lovelace, Geoffrey; Szilagyi, Bela; Pfeiffer, Harald; Zenginoglu, Anil; Kidder, Larry; Taylor, Nicholas; Hemberger, Dan; Scheel, Mark;
    Publisher: Zenodo
    Project: NSERC , NSF | Gravitational Radiation a... (1068881), NSF | Collaborative Research: D... (1005655), NSF | Research in Black-Hole Ph... (0969111), NSF | MRI-R2: Acquisition of a ... (0960291), NSF | Collaborative Research: D... (1005426), NSF | FRG: Collaborative Resear... (1065438)

    Simulation of a black-hole binary system evolved by the SpEC code.

  • English
    Authors: 
    Cao, Levy L.; Zhou, Jiliang; Qu, Zheng-Wang; Stephan, Douglas W.;
    Publisher: Cambridge Crystallographic Data Centre
    Project: NSERC

    Related Article: Levy L. Cao, Jiliang Zhou, Zheng-Wang Qu, Douglas W. Stephan|2019|Angew.Chem.,Int.Ed.|58|18487|doi:10.1002/anie.201912338

  • Open Access
    Authors: 
    Yonghong Zhang; Petropoulos, Sophie; Jinhua Liu; Cheishvili, David; Zhou, Rudy; Dymov, Sergiy; Li, Kang; Li, Ning; Szyf, Moshe;
    Publisher: figshare
    Project: CIHR

    Differentially methylated sites between Stage 4 HCC and healthy controls. (CSV 3562 kb)

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

    No data abstract available. SRC for p+Pb, pT>0.5GeV

  • Research data . Image . 2021 . Embargo End Date: 29 Sep 2021
    Open Access
    Authors: 
    (:Unkn) Unknown;
    Publisher: Electronic version published by Vancouver Island University
    Country: Canada

    Plant, view from 4th floor

  • Authors: 
    Mallen-Ornelas, G.; Seager, S.; H.K.C., Yee; Minniti, D.; Gladders, M.D.; Mallen-Fullerton, G.M.; Brown, T.M.;
    Publisher: Centre de Donnees Strasbourg (CDS)
    Project: NSERC

    VizieR online Data Catalogue associated with article published in journal Astronomical Journal (AAS) with title 'The EXPLORE project. I. A deep search for transiting extrasolar planets.' (bibcode: 2003ApJ...582.1123M)

  • Open Access
    Authors: 
    Kidder, Larry; Lovelace, Geoffrey; Hemberger, Dan; Pfeiffer, Harald; Boyle, Michael; Scheel, Mark; Mroue, Abdul; Taylor, Nicholas; Szilagyi, Bela; Zenginoglu, Anil;
    Publisher: Zenodo
    Project: NSF | MRI-R2: Acquisition of a ... (0960291), NSERC , NSF | Maximizing Scientific Out... (1806665), NSF | Collaborative Research: P... (1713694), NSF | Gravitational Radiation a... (1708213), NSF | FRG: Collaborative Resear... (1065438), NSF | Leadership Class Scientif... (0725070), NSF | Collaborative Research: D... (1005655), NSF | Sustained-Petascale In Ac... (1238993), NWO | Precision Gravity: black ... (29769),...

    Simulation of a black-hole binary system evolved by the SpEC code.