Yesenia Hernández Jiménez

Measurement of the Lambda_b lifetime and mass in the ATLAS experiment

Aad, G.; et al., [Unknown]; Aben, R.; Beemster, L.J.; Bentvelsen, S.; Berglund, E.; Bobbink, G.J.; Bos, K.; Boterenbrood, H.; Colijn, A.P.; de Jong, P.; de Nooij, L.; Deluca, C.; Deviveiros, P.O.; Doxiadis, A.D.; Ferrari, P.; Garitaonandia, H.; Geerts, D.A.A.; Gosselink, M.; Hartjes, F.; Hessey, N.P.; Igonkina, O.; Kayl, M.S.; Klous, S.; Kluit, P.; Koffeman, E.; Lee, H.; Lenz, T.; Linde, F.; Luijckx, G.; Massaro, G.; Mechnich, J.; Mussche, I.; Ottersbach, J.P.; Pani, P.; Rijpstra, M.; Ruckstuhl, N.; Ta, D.; Tsiakiris, M.; Turlay, E.; van der Deijl, P.C.; van der Geer, R.; van der Graaf, H.; van der Leeuw, R.; van der Poel, E.; van Vulpen, I.; Verkerke, W.; Vermeulen, J.C.; Vranjes Milosavljevic, M.; Vreeswijk, M.A measurement of the Λb lifetime and mass in the decay channel Λ 0 b → J/ψ(μ+μ−)Λ0(pπ−) is presented. The analysis uses a signal sample of about 2200 Λb and Λ̄ 0 b decays that are reconstructed in 4.9 fb −1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb lifetime and mass. They are measured to be τΛb = 1.449± 0.036(stat)± 0.017(syst) ps and mΛb = 5619.7± 0.7(stat)± 1.1(syst) MeV. ar X iv :1 20 7. 22 84 v3 [ he pex ] 2 0 A pr 2 01 3 Measurement of the Λ0b lifetime and mass in the ATLAS experiment The ATLAS Collaboration (Dated: May 2, 2014) A measurement of the Λb lifetime and mass in the decay channel Λ 0 b → J/ψ(μ+μ−)Λ0(pπ−) is presented. The analysis uses a signal sample of about 2200 Λb and Λ̄ 0 b decays that are reconstructed in 4.9 fb−1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Λb lifetime and mass. They are measured to be τΛb = 1.449± 0.036(stat)± 0.017(syst) ps and mΛb = 5619.7± 0.7(stat)± 1.1(syst) MeV.

Measurement of the top quark mass with the template method in the t anti t→lepton+jets channel using ATLAS data

The top quark mass has been measured using the template method in the tt̄→ lepton+jets channel based on data recorded in 2011 with the ATLAS detector at the LHC. The data were taken at a protonproton centre-of-mass energy of √ s = 7 TeV and correspond to an integrated luminosity of 1.04 fb−1. The analyses in the e+jets and μ+jets decay channels yield consistent results. The top quark mass is measured to be mtop = 174.5 ± 0.6stat ± 2.3syst GeV. ar X iv :1 20 3. 57 55 v2 [ he pex ] 1 2 Ju n 20 12 Eur. Phys. J. C manuscript No. (will be inserted by the editor) Measurement of the Top Quark Mass with the Template Method in the tt̄ → lepton+jets Channel using ATLAS Data The ATLAS Collaboration Received: date / Accepted: date Abstract The top quark mass has been measured using the template method in the tt̄→ lepton+jets chan-The top quark mass has been measured using the template method in the tt̄→ lepton+jets channel based on data recorded in 2011 with the ATLAS detector at the LHC. The data were taken at a protonproton centre-of-mass energy of √ s = 7 TeV and correspond to an integrated luminosity of 1.04 fb−1. The analyses in the e+jets and μ+jets decay channels yield consistent results. The top quark mass is measured to be mtop = 174.5 ± 0.6stat ± 2.3syst GeV.The top quark mass has been measured using the template method in the \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}

Measurement of t anti t production with a veto on additional central jet activity in pp collisions at √(s)=7 TeV using the ATLAS detector

t\bar{t}\to\mathrm{lepton}+\mathrm{jets}

A search for t[bar over t] resonances in lepton+jets events with highly boosted top quarks collected in pp collisions at √s = 7 TeV with the ATLAS detector

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Observation of a Centrality‐Dependent Dijet Asymmetry in Lead‐Lead Collisions at √SNN= 2.76 TeV with the ATLAS Detector at LHC

\sqrt{s}=7\ \mbox{TeV}

Measurement of the W‐>lnu and Z/gamma*‐>ll production cross sections in protonproton collisions at √s = 7 TeV with the ATLAS detector

\end{document} and correspond to an integrated luminosity of 1.04 fb−1. The analyses in the e+jets and μ+jets decay channels yield consistent results. The top quark mass is measured to be mtop=174.5±0.6stat±2.3syst GeV.

Search for the Higgs boson in the H->WW->lnujj decay channel in pp collisions at sqrt{s} = 7 TeV with the ATLAS detector

A measurement of the jet activity in \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}