Exportar registro bibliográfico


Metrics:

Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at s√=8 TeV with the ATLAS detector (2018)

  • Authors:
  • Autor USP: LEITE, MARCO AURELIO LISBOA - IF
  • Unidade: IF
  • DOI: 10.1140/epjc/s10052-018-5904-z
  • Subjects: COLISÕES DE ÍONS PESADOS RELATIVÍSTICOS; LHC
  • Agências de fomento:
  • Language: Inglês
  • Abstract: The inclusive and fiducial tt¯ production cross-sections are measured in the lepton+jets channel using 20.2 fb−1 of proton–proton collision data at a centre-of-mass energy of 8 TeV recorded with the ATLAS detector at the LHC. Major systematic uncertainties due to the modelling of the jet energy scale and b-tagging efficiency are constrained by separating selected events into three disjoint regions. In order to reduce systematic uncertainties in the most important background, the W+\,jets process is modelled using Z + jets events in a data-driven approach. The inclusive tt¯ cross-section is measured with a precision of 5.7% to be σinc(tt¯)=248.3±0.7(stat.)±13.4(syst.)±4.7(lumi.) pb , assuming a top-quark mass of 172.5 GeV. The result is in agreement with the Standard Model prediction. The cross-section is also measured in a phase space close to that of the selected data. The fiducial cross-section is σfid(tt¯)=48.8±0.1(stat.)±2.0(syst.)±0.9(lumi.) pb with a precision of 4.5%.
  • Imprenta:
  • Source:
  • DOI
    Informações sobre o DOI: 10.1140/epjc/s10052-018-5904-z (Fonte: oaDOI API)
    • Este periódico é de acesso aberto
    • Este artigo é de acesso aberto
    • URL de acesso aberto
    • Cor do Acesso Aberto: gold
    • Licença: cc-by

    How to cite
    A citação é gerada automaticamente e pode não estar totalmente de acordo com as normas

    • ABNT

      AABOUD, M; DONADELLI, Marisílvia; ROSA NAVARRO, José Luis La; LEITE, Marco Aurelio Lisboa. Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at s√=8 TeV with the ATLAS detector. European Journal Physical C, Berlim, Springer, v. 78, n. 487, p. 1-31, 2018. DOI: 10.1140/epjc/s10052-018-5904-z.
    • APA

      Aaboud, M., Donadelli, M., Rosa Navarro, J. L. L., & Leite, M. A. L. (2018). Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at s√=8 TeV with the ATLAS detector. European Journal Physical C, 78( 487), 1-31. doi:10.1140/epjc/s10052-018-5904-z
    • NLM

      Aaboud M, Donadelli M, Rosa Navarro JLL, Leite MAL. Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at s√=8 TeV with the ATLAS detector. European Journal Physical C. 2018 ; 78( 487): 1-31.
    • Vancouver

      Aaboud M, Donadelli M, Rosa Navarro JLL, Leite MAL. Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at s√=8 TeV with the ATLAS detector. European Journal Physical C. 2018 ; 78( 487): 1-31.

    Referências citadas na obra
    P.W. Higgs, Broken symmetries and the masses of gauge bosons. Phys. Rev. Lett. 13, 508 (1964)
    F. Englert, R. Brout, Broken symmetry and the mass of gauge vector mesons. Phys. Rev. Lett. 13, 321 (1964)
    M. Baak et al., The global electroweak fit at NNLO and prospects for the LHC and ILC. Eur. Phys. J. C 74, 3046 (2014). arXiv:1407.3792 [hep-ph]
    A. Buckley et al., Constraining top quark effective theory in the LHC Run II era. JHEP 04, 015 (2016). arXiv:1512.03360 [hep-ph]
    M. Czakon, P. Fiedler, A. Mitov, The total top quark pair production cross-section at hadron colliders through $$O(\alpha _S^4)$$ O ( α S 4 ) . Phys. Rev. Lett. 110, 252004 (2013). arXiv:1303.6254 [hep-ph]
    U. Langenfeld, S. Moch, P. Uwer, Measuring the running top-quark mass. Phys. Rev. D 80, 054009 (2009). arXiv:0906.5273 [hep-ph]
    S.-Q. Wang, X.-G. Wu, Z.-G. Si, S.J. Brodsky, A precise determination of the top-quark pole mass. Eur. Phys. J. C 78, 237 (2018). arXiv:1703.03583 [hep-ph]
    R. Franceschini, Wish-list for Run II top quark measurements (for BSM). In 3rd Large Hadron Collider Physics Conference (LHCP 2015), St. Petersburg, Russia, 31 Aug–5 Sept 2015 (2016). arXiv:1601.02684 [hep-ph]. http://inspirehep.net/record/1414954/files/arXiv:1601.02684.pdf
    M. Cacciari et al., Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation. Phys. Lett. B 710, 612 (2012). arXiv:1111.5869 [hep-ph]
    P. Bärnreuther, M. Czakon, A. Mitov, Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to $$q\bar{q}\rightarrow t{\bar{t}}$$ q q ¯ → t t ¯ . Phys. Rev. Lett. 109, 132001 (2012). arXiv:1204.5201 [hep-ph]
    M. Czakon, A. Mitov, NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels. JHEP 12, 054 (2012). arXiv:1207.0236 [hep-ph]
    M. Czakon, A. Mitov, NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction. JHEP 01, 080 (2013). arXiv:1210.6832 [hep-ph]
    M. Czakon, A. Mitov, Top++: a program for the calculation of the top-pair cross-section at hadron colliders. Comput. Phys. Commun. 185, 2930 (2014). arXiv:1112.5675 [hep-ph]
    M. Botje et al., The PDF4LHC working group interim recommendations (2011). arXiv:1101.0538 [hep-ph]
    A.D. Martin, W.J. Stirling, R.S. Thorne, G. Watt, Parton distributions for the LHC. Eur. Phys. J. C 63, 189 (2009). arXiv:0901.0002 [hep-ph]
    A.D. Martin, W.J. Stirling, R.S. Thorne, G. Watt, Uncertainties on $$\alpha _S$$ α S in global PDF analyses and implications for predicted hadronic cross sections. Eur. Phys. J. C 64, 653 (2009). arXiv:0905.3531 [hep-ph]
    H.-L. Lai et al., New parton distributions for collider physics. Phys. Rev. D 82, 074024 (2010). arXiv:1007.2241 [hep-ph]
    J. Gao et al., CT10 next-to-next-to-leading order global analysis of QCD. Phys. Rev. D 89, 033009 (2014). arXiv:1302.6246 [hep-ph]
    R.D. Ball et al., Parton distributions with LHC data. Nucl. Phys. B 867, 244 (2013). arXiv:1207.1303 [hep-ph]
    C. Muselli et al., Top quark pair production beyond NNLO. JHEP 08, 076 (2015). arXiv:1505.02006 [hep-ph]
    N. Kidonakis, NNNLO soft-gluon corrections for the top-antitop pair production cross section. Phys. Rev. D 90, 014006 (2014). arXiv:1405.7046 [hep-ph]
    CDF and D0 Collaborations, Combination of measurements of the top-quark pair production cross section from the Tevatron Collider. Phys. Rev. D 89, 072001 (2014). arXiv:1309.7570 [hep-ex]
    ATLAS Collaboration, Measurement of the $$t\bar{t}$$ t t ¯ production cross-section using $$e\mu $$ e μ events with b-tagged jets in pp collisions at $$\sqrt{s} = 7$$ s = 7 and 8 TeV with the ATLAS detector. Eur. Phys. J. C 74, 3109 (2014). arXiv:1406.5375 [hep-ex] [Addendum: Eur. Phys. J. C 76, 642 (2016)]
    ATLAS Collaboration, Measurement of the $$t\bar{t}$$ t t ¯ production cross-section using $$e\mu $$ e μ events with b-tagged jets in pp collisions at $$\sqrt{s} = 13$$ s = 13  TeV with the ATLAS detector. Phys. Lett. B 761, 136 (2016). arXiv:1606.02699 [hep-ex]
    CMS Collaboration, Measurement of the $$t\bar{t}$$ t t ¯ production cross section in the $$e\mu $$ e μ channel in proton-proton collisions at $$\sqrt{s} = 7$$ s = 7 and 8 TeV. JHEP 08, 029 (2016). arXiv:1603.02303 [hep-ex]
    CMS Collaboration, Measurement of the $$t\bar{t}$$ t t ¯ production cross section using events in the $$e\mu $$ e μ final state in pp collisions at $$\sqrt{s} = 13$$ s = 13  TeV. Eur. Phys. J. C 77, 172 (2017). arXiv:1611.04040 [hep-ex]
    LHCb Collaboration, Measurement of forward $$t\bar{t}, W + b\bar{b}$$ t t ¯ , W + b b ¯ and $$W + c\bar{c}$$ W + c c ¯ production in pp collisions at $$\sqrt{s} = 8$$ s = 8  TeV. Phys. Lett. B 767, 110 (2017). arXiv:1610.08142 [hep-ex]
    CMS Collaboration, Measurements of the $$t\bar{t}$$ t t ¯ production cross section in lepton+jets final states in pp collisions at 8 TeV and ratio of 8 to 7 TeV cross sections. Eur. Phys. J. C 77, 15 (2017). arXiv:1602.09024 [hep-ex]
    ATLAS Collaboration, Measurement of the top pair production cross section in 8 TeV proton–proton collisions using kinematic information in the lepton+jets final state with ATLAS. Phys. Rev. D 91, 112013 (2015). arXiv:1504.04251 [hep-ex]
    ATLAS Collaboration, The ATLAS experiment at the CERN large hadron collider. JINST 3, S08003 (2008)
    ATLAS Collaboration, Performance of the ATLAS trigger system in 2010. Eur. Phys. J. C 72, 1849 (2012). arXiv:1110.1530 [hep-ex]
    ATLAS Collaboration, The ATLAS simulation infrastructure. Eur. Phys. J. C 70, 823 (2010). arXiv:1005.4568 [physics.ins-det]
    S. Agostinelli et al., GEANT4: a simulation toolkit. Nucl. Instrum. Methods A 506, 250 (2003)
    T. Sjöstrand et al., An introduction to PYTHIA 8.2. Comput. Phys. Commun. 191, 159 (2015). arXiv:1410.3012 [hep-ph]
    S. Alioli, P. Nason, C. Oleari, E. Re, A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX. JHEP 06, 043 (2010). arXiv:1002.2581 [hep-ph]
    S. Frixione, P. Nason, G. Ridolfi, A positive-weight next-to-leading-order Monte Carlo for heavy flavour hadroproduction. JHEP 09, 126 (2007). arXiv:0707.3088 [hep-ph]
    T. Sjöstrand, S. Mrenna, P.Z. Skands, PYTHIA 6.4 physics and manual. JHEP 05, 026 (2006). arXiv:hep-ph/0603175
    P.Z. Skands, Tuning Monte Carlo generators: the Perugia tunes. Phys. Rev. D 82, 074018 (2010). arXiv:1005.3457 [hep-ph]
    G. Corcella et al., HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes). JHEP 01, 010 (2001). arXiv:hep-ph/0011363
    S. Frixione, B.R. Webber, Matching NLO QCD computations and parton shower simulations. JHEP 06, 029 (2002). arXiv:hep-ph/0204244
    S. Frixione, P. Nason, B.R. Webber, Matching NLO QCD and parton showers in heavy flavor production. JHEP 08, 007 (2003). arXiv:hep-ph/0305252
    J.M. Butterworth, J.R. Forshaw, M.H. Seymour, Multiparton interactions in photoproduction at HERA. Z. Phys. C 72, 637 (1996). arXiv:hep-ph/9601371
    ATLAS Collaboration, New ATLAS event generator tunes to 2010 data. ATL-PHYS-PUB-2011-008 (2011). https://cds.cern.ch/record/1345343
    ATLAS Collaboration, Comparison of Monte Carlo generator predictions to ATLAS measurements of top pair production at 7 TeV. ATL-PHYS-PUB-2015-002 (2015). https://cds.cern.ch/record/1981319
    S. Alioli, P. Nason, C. Oleari, E. Re. NLO single-top production matched with shower in POWHEG: s- and t-channel contributions. JHEP 09, 111 (2009). arXiv:0907.4076 [hep-ph] [Erratum: JHEP 02, 011 (2010)]
    E. Re, Single-top Wt-channel production matched with parton showers using the POWHEG method. Eur. Phys. J. C 71, 1547 (2011). arXiv:1009.2450 [hep-ph]
    N. Kidonakis, Two-loop soft anomalous dimensions for single top quark associated production with a $$W^{-}$$ W - or $$H^{-}$$ H - . Phys. Rev. D 82, 054018 (2010). arXiv:1005.4451 [hep-ph]
    P. Kant et al., HatHor for single top-quark production: updated predictions and uncertainty estimates for single top-quark production in hadronic collisions. Comput. Phys. Commun. 191, 74 (2015). arXiv:1406.4403 [hep-ph]
    J.M. Campbell, R. Frederix, F. Maltoni, F. Tramontano, Next-to-leading-order predictions for t-channel single-top production at hadron colliders. Phys. Rev. Lett. 102, 182003 (2009). arXiv:0903.0005 [hep-ph]
    M.L. Mangano et al., ALPGEN, a generator for hard multiparton processes in hadronic collisions. JHEP 07, 001 (2003). arXiv:hep-ph/0206293
    J. Pumplin et al., New generation of parton distributions with uncertainties from global QCD analysis. JHEP 07, 012 (2002). arXiv:hep-ph/0201195
    J. Alwall et al., Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions. Eur. Phys. J. C 53, 473 (2008). arXiv:0706.2569 [hep-ph]
    R. Gavin, Y. Li, F. Petriello, S. Quackenbush, FEWZ 2.0: a code for hadronic Z production at next-to-next-to-leading order. Comput. Phys. Commun. 182, 2388 (2011). arXiv:1011.3540 [hep-ph]
    R. Gavin, Y. Li, F. Petriello, S. Quackenbush, W physics at the LHC with FEWZ 2.1. Comput. Phys. Commun. 184, 208 (2013). arXiv:1201.5896 [hep-ph]
    T. Gleisberg et al., Event generation with SHERPA 1.1. JHEP 02, 007 (2009). arXiv:0811.4622 [hep-ph]
    S. Hoeche, F. Krauss, S. Schumann, F. Siegert, QCD matrix elements and truncated showers. JHEP 05, 053 (2009). arXiv:0903.1219 [hep-ph]
    J.M. Campbell, R.K. Ellis, C. Williams, Vector boson pair production at the LHC. JHEP 07, 018 (2011). arXiv:1105.0020 [hep-ph]
    ATLAS Collaboration, Electron efficiency measurements with the ATLAS detector using 2012 LHC proton–proton collision data. Eur. Phys. J. C 77, 195 (2017). arXiv:1612.01456 [hep-ex]
    ATLAS Collaboration, Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data. Eur. Phys. J. C 74, 3071 (2014). arXiv:1407.5063 [hep-ex]
    ATLAS Collaboration, Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton–proton collision data. Eur. Phys. J. C 74, 3130 (2014). arXiv:1407.3935 [hep-ex]
    K. Rehermann, B. Tweedie, Efficient identification of boosted semileptonic top quarks at the LHC. JHEP 03, 059 (2011). arXiv:1007.2221 [hep-ph]
    M. Cacciari, G.P. Salam, G. Soyez, The anti-kt jet clustering algorithm. JHEP 04, 063 (2008). arXiv:0802.1189 [hep-ph]
    M. Cacciari, G.P. Salam, G. Soyez, FastJet user manual. Eur. Phys. J. C 72, 1896 (2012). arXiv:1111.6097 [hep-ph]
    ATLAS Collaboration, Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1. Eur. Phys. J. C 77, 490 (2017). arXiv:1603.02934 [hep-ex]
    ATLAS Collaboration, Jet energy measurement and its systematic uncertainty in proton–proton collisions at $$\sqrt{s} = 7$$ s = 7  TeV with the ATLAS detector. Eur. Phys. J. C 75, 17 (2015). arXiv:1406.0076 [hep-ex]
    ATLAS Collaboration, Performance of pile-up mitigation techniques for jets in pp collisions at $$\sqrt{s} = 8$$ s = 8  TeV using the ATLAS detector. Eur. Phys. J. C 76, 581 (2016). arXiv:1510.03823 [hep-ex]
    ATLAS Collaboration, Performance of b-jet identification in the ATLAS experiment. JINST 11, P04008 (2016). arXiv:1512.01094 [hep-ex]
    ATLAS Collaboration, Performance of algorithms that reconstruct missing transverse momentum in $$\sqrt{s} = 8$$ s = 8  TeV proton–proton collisions in the ATLAS detector. Eur. Phys. J. C 77, 241 (2017). arXiv:1609.09324 [hep-ex]
    ATLAS Collaboration, Performance of the ATLAS muon trigger in pp collisions at $$\sqrt{s} = 8$$ s = 8  TeV. Eur. Phys. J. C 75, 120 (2015). arXiv:1408.3179 [hep-ex]
    ATLAS Collaboration, Jet energy measurement with the ATLAS detector in proton–proton collisions at $$\sqrt{s} = 7$$ s = 7  TeV. Eur. Phys. J. C 73, 2304 (2013). arXiv:1112.6426 [hep-ex]
    ATLAS Collaboration, Estimation of non-prompt and fake lepton backgrounds in final states with top quarks produced in proton–proton collisions at $$\sqrt{s} = 8$$ s = 8  TeV with the ATLAS Detector. ATLAS-CONF-2014-058 (2014). https://cds.cern.ch/record/1951336
    M. Feindt, A neural Bayesian estimator for conditional probability densities (2004). arXiv:physics/0402093 [physics.data-an]
    M. Feindt, U. Kerzel, The NeuroBayes neural network package. Nucl. Instrum. Methods A 559, 190 (2006)
    ATLAS Collaboration, Measurement of the top quark mass in the $$t\bar{t}$$ t t ¯ lepton+jets and $$t\bar{t}$$ t t ¯ dilepton channels using $$\sqrt{s} =7$$ s = 7  TeV ATLAS data. Eur. Phys. J. C 75, 330 (2015). arXiv:1503.05427 [hep-ex]
    CMS Collaboration, Measurement of the top quark mass using proton-proton data at $$\sqrt{s} = 7$$ s = 7 and 8 TeV. Phys. Rev. D 93, 072004 (2016). arXiv:1509.04044 [hep-ex]
    D0 Collaboration, Precise measurement of the top quark mass from lepton+jets events at D0. Phys. Rev. Lett. 101, 182001 (2008). arXiv:0807.2141 [hep-ex]
    CDF Collaboration, Precision top-quark mass measurements at CDF. Phys. Rev. Lett. 109, 152003 (2012). arXiv:1207.6758 [hep-ex]
    ATLAS Collaboration, Data-driven determination of the energy scale and resolution of jets reconstructed in the ATLAS calorimeters using dijet and multijet events at $$\sqrt{s} = 8$$ s = 8  TeV. ATLAS-CONF-2015-017 (2015). https://cds.cern.ch/record/2008678
    ATLAS Collaboration, Determination of the jet energy scale and resolution at ATLAS using $$\text{Z}/\gamma $$ Z / γ -jet events in data at $$\sqrt{s} = 8$$ s = 8  TeV. ATLAS-CONF-2015-057 (2015). https://cds.cern.ch/record/2059846
    ATLAS Collaboration, Calibration of the performance of b-tagging for c and light-flavour jets in the 2012 ATLAS data. ATLAS-CONF-2014-046 (2014). https://cds.cern.ch/record/1741020
    ATLAS Collaboration, Calibration of b-tagging using dileptonic top pair events in a combinatorial likelihood approach with the ATLAS experiment. ATLAS-CONF-2014-004 (2014). https://cds.cern.ch/record/1664335
    J. Butterworth et al., PDF4LHC recommendations for LHC Run II. J. Phys. G 43, 023001 (2016). arXiv:1510.03865 [hep-ph]
    ATLAS Collaboration, Luminosity determination in pp collisions at $$\sqrt{s} = 8$$ s = 8  TeV using the ATLAS detector at the LHC. Eur. Phys. J. C 76, 653 (2016). arXiv:1608.03953 [hep-ex]
    E. Todesco, J. Wenninger, Large hadron collider momentum calibration and accuracy. Phys. Rev. Accel. Beams 20, 081003 (2017)
    ATLAS Collaboration, Measurement of the cross-section for W boson production in association with b-jets in pp collisions at $$\sqrt{s} = 7$$ s = 7  TeV with the ATLAS detector. JHEP 06, 084 (2013). arXiv:1302.2929 [hep-ex]
    ATLAS Collaboration, Measurement of the $$t\bar{t}$$ t t ¯ production cross-section using $$e\mu $$ e μ events with b-tagged jets in pp collisions at $$\sqrt{s} = 7$$ s = 7 and 8 TeV with the ATLAS detector. Eur. Phys. J. C 74, 3109 (2014). arXiv:1406.5375 [hep-ex]
    ATLAS Collaboration, ATLAS computing acknowledgements. ATL-GEN-PUB-2016-002. https://cds.cern.ch/record/2202407

Digital Library of Intellectual Production of Universidade de São Paulo     2012 - 2020