Navegar

Colección

Datos Estadísticas

Artículo

Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The inclusive and fiducial tt¯ production cross-sections are measured in the lepton+jets channel using 20.2fb-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%. © 2018, CERN for the benefit of the ATLAS collaboration.

Registro:

Documento: Artículo
Título:Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at √s=8TeV with the ATLAS detector
Autor:Aaboud, M. et al.
Este artículo contiene 2905 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2905 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2018
Volumen:78
Número:6
DOI: http://dx.doi.org/10.1140/epjc/s10052-018-5904-z
Título revista:European Physical Journal C
Título revista abreviado:Eur. Phys. J. C
ISSN:14346044
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v78_n6_p_Aaboud

Referencias:

  • Higgs, P.W., Broken symmetries and the masses of gauge bosons (1964) Phys. Rev. Lett., 13, p. 508
  • Englert, F., Brout, R., Broken symmetry and the mass of gauge vector mesons (1964) Phys. Rev. Lett., 13, p. 321
  • Baak, M., The global electroweak fit at NNLO and prospects for the LHC and ILC (2014) Eur. Phys. J. C, 74, p. 3046. , [hep-ph]
  • Buckley, A., Constraining top quark effective theory in the LHC Run II era (2016) JHEP, 4, p. 015. , [hep-ph]
  • Czakon, M., Fiedler, P., Mitov, A., The total top quark pair production cross-section at hadron colliders through O(αS4) (2013) Phys. Rev. Lett., 110, p. 252004. , [hep-ph]
  • Langenfeld, U., Moch, S., Uwer, P., Measuring the running top-quark mass (2009) Phys. Rev. D, 80, p. 054009. , [hep-ph]
  • Wang, S.-Q., Wu, X.-G., Si, Z.-G., Brodsky, S.J., A precise determination of the top-quark pole mass (2018) Eur. Phys. J. C, 78, p. 237. , [hep-ph]
  • Franceschini, R., (2015) St. Petersburg, Russia, 31 Aug–5 Sept 2015 (2016), 2684 ([hep-ph]), p. 1601. , http://inspirehep.net/record/1414954/files/arXiv:1601.02684.pdf, Wish-list for Run II top quark measurements (for BSM). 3rd Large Hadron Collider Physics Conference (LHCP
  • Cacciari, M., Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation (2012) Phys. Lett. B, 710, p. 612. , [hep-ph]
  • Bärnreuther, P., Czakon, M., Mitov, A., Percent level precision physics at the Tevatron: first genuine NNLO QCD corrections to qq¯ → tt¯ (2012) Phys. Rev. Lett., 109, p. 132001. , [hep-ph]
  • Czakon, M., Mitov, A., NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels (2012) JHEP, 12, p. 054. , [hep-ph]
  • Czakon, M., Mitov, A., NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction (2013) JHEP, 1, p. 080. , [hep-ph]
  • Czakon, M., Mitov, A., Top++: a program for the calculation of the top-pair cross-section at hadron colliders (2014) Comput. Phys. Commun., 185, p. 2930. , [hep-ph]
  • The PDF4LHC working group interim recommendations (2011), , M. Botje et al. hep-ph
  • Martin, A.D., Stirling, W.J., Thorne, R.S., Watt, G., Parton distributions for the LHC (2009) Eur. Phys. J. C, 63, p. 189. , [hep-ph]
  • Martin, A.D., Stirling, W.J., Thorne, R.S., Watt, G., Uncertainties on α S in global PDF analyses and implications for predicted hadronic cross sections (2009) Eur. Phys. J. C, 64, p. 653. , [hep-ph]
  • Lai, H.-L., New parton distributions for collider physics (2010) Phys. Rev. D, 82, p. 074024. , [hep-ph]
  • Gao, J., CT10 next-to-next-to-leading order global analysis of QCD (2014) Phys. Rev. D, 89, p. 033009. , [hep-ph]
  • Ball, R.D., Parton distributions with LHC data (2013) Nucl. Phys. B, 867, p. 244. , [hep-ph]
  • Muselli, C., Top quark pair production beyond NNLO (2015) JHEP, 8, p. 076. , [hep-ph]
  • Kidonakis, N., NNNLO soft-gluon corrections for the top-antitop pair production cross section (2014) Phys. Rev. D, 90, p. 014006. , [hep-ph]
  • (2014) Combination of measurements of the top-quark pair production cross section from the Tevatron Collider. Phys. Rev, , CDF and D0 CollaborationsD 89, 072001 hep-ex
  • (2014) Eur. Phys. J. C, , ATLAS Collaboration, Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at √ s=7 and 8 TeV with the ATLAS detector.74, 310642 (2016)
  • (2016) Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at √ s=13 TeV with the ATLAS detector. Phys. Lett, , ATLAS CollaborationB 761, 136 hep-ex
  • (2016) Measurement of the tt¯ production cross section in the eμ channel in proton-proton collisions at √ s=7 and 8 TeV, , CMS CollaborationJHEP 08, 029 hep-ex
  • (2017) Measurement of the tt¯ production cross section using events in the eμ final state in pp collisions at √ s=13 TeV. Eur. Phys. J, , CMS CollaborationC 77, 172 hep-ex
  • (2017) W+ bb¯ and W+ cc¯ production in pp collisions at √ s=8 TeV. Phys. Lett, , LHCb Collaboration, Measurement of forward tt¯B 767, 110 hep-ex
  • (2017) Measurements of the tt¯ 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, , CMS CollaborationC 77, 15 hep-ex
  • (2015) 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, , ATLAS CollaborationD 91, 112013 hep-ex
  • The ATLAS experiment at the CERN large hadron collider (2008) JINST, 3, p. S08003
  • (2010) Eur. Phys. J. C 72, 1849 (2012), 1530 ([hep-ex]), p. 1110. , http://arxiv.org/abs/1110.1530
  • (2010) The ATLAS simulation infrastructure. Eur. Phys. J, , ATLAS CollaborationC 70, 823 physics.ins-det
  • Agostinelli, S., GEANT4: a simulation toolkit (2003) Nucl. Instrum. Methods A, 506, p. 250
  • Sjöstrand, T., An introduction to PYTHIA 8.2 (2015) Comput. Phys. Commun., 191, p. 159. , [hep-ph]
  • Alioli, S., Nason, P., Oleari, C., Re, E., A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX (2010) JHEP, 6, p. 043. , [hep-ph]
  • Frixione, S., Nason, P., Ridolfi, G., A positive-weight next-to-leading-order Monte Carlo for heavy flavour hadroproduction (2007) JHEP, 9, p. 126. , [hep-ph]
  • (2006) PYTHIA 6.4 physics and manual, , T. Sjöstrand, S. Mrenna, P.Z. SkandsJHEP 05, 026arXiv:hep-ph/0603175
  • Skands, P.Z., Tuning Monte Carlo generators: the Perugia tunes (2010) Phys. Rev. D, 82, p. 074018. , [hep-ph]
  • Corcella, G., HERWIG 6: an event generator for hadron emission reactions with interfering gluons (including supersymmetric processes) (2001) JHEP, 1, p. 010
  • Frixione, S., Webber, B.R., Matching NLO QCD computations and parton shower simulations (2002) JHEP, 6, p. 029
  • Frixione, S., Nason, P., Webber, B.R., Matching NLO QCD and parton showers in heavy flavor production (2003) JHEP, 8, p. 007
  • Butterworth, J.M., Forshaw, J.R., Seymour, M.H., Multiparton interactions in photoproduction at HERA (1996) Z. Phys. C, 72, p. 637
  • New ATLAS event generator tunes to 2010 data (2011) ATL-PHYS-PUB-2011-008, , https://cds.cern.ch/record/1345343
  • Comparison of Monte Carlo generator predictions to ATLAS measurements of top pair production at 7 TeV (2015) ATL-PHYS-PUB-2015-002, , https://cds.cern.ch/record/1981319
  • (2009) JHEP, , S. Alioli, P. Nason, C. Oleari, E. Re. NLO single-top production matched with shower in POWHEG: s- and t-channel contributions. JHEP 09, 11011 (2010)
  • Re, E., Single-top Wt-channel production matched with parton showers using the POWHEG method (2011) Eur. Phys. J. C, 71, p. 1547. , [hep-ph]
  • Kidonakis, N., Two-loop soft anomalous dimensions for single top quark associated production with a W - or H - (2010) Phys. Rev. D, 82, p. 054018. , [hep-ph]
  • Kant, P., HatHor for single top-quark production: updated predictions and uncertainty estimates for single top-quark production in hadronic collisions (2015) Comput. Phys. Commun., 191, p. 74. , [hep-ph]
  • Campbell, J.M., Frederix, R., Maltoni, F., Tramontano, F., Next-to-leading-order predictions for t-channel single-top production at hadron colliders (2009) Phys. Rev. Lett., 102, p. 182003. , [hep-ph]
  • Mangano, M.L., ALPGEN, a generator for hard multiparton processes in hadronic collisions (2003) JHEP, 7, p. 001
  • Pumplin, J., New generation of parton distributions with uncertainties from global QCD analysis (2002) JHEP, 7, p. 012
  • Alwall, J., Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions (2008) Eur. Phys. J. C, 53, p. 473. , [hep-ph]
  • Gavin, R., Li, Y., Petriello, F., Quackenbush, S., FEWZ 2.0: a code for hadronic Z production at next-to-next-to-leading order (2011) Comput. Phys. Commun., 182, p. 2388. , [hep-ph]
  • Gavin, R., Li, Y., Petriello, F., Quackenbush, S., W physics at the LHC with FEWZ 2.1 (2013) Comput. Phys. Commun., 184, p. 208. , [hep-ph]
  • Gleisberg, T., Event generation with SHERPA 1.1 (2009) JHEP, 2, p. 007. , [hep-ph]
  • Hoeche, S., Krauss, F., Schumann, S., Siegert, F., QCD matrix elements and truncated showers (2009) JHEP, 5, p. 053. , [hep-ph]
  • Campbell, J.M., Ellis, R.K., Williams, C., Vector boson pair production at the LHC (2011) JHEP, 7, p. 018. , [hep-ph]
  • LHC proton–proton collision data (2012) Eur. Phys. J. C 77, 195 (2017), 1456 ([hep-ex]), p. 1612. , http://arxiv.org/abs/1612.01456
  • (2014) Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data. Eur. Phys. J, , ATLAS CollaborationC 74, 3071 hep-ex
  • LHC proton–proton collision data (2012) Eur. Phys. J. C, 3935 ([hep-ex]), p. 1407. , http://arxiv.org/abs/1407.3935
  • Rehermann, K., Tweedie, B., Efficient identification of boosted semileptonic top quarks at the LHC (2011) JHEP, 3, p. 059. , [hep-ph]
  • Cacciari, M., Salam, G.P., Soyez, G., The anti-kt jet clustering algorithm (2008) JHEP, 4, p. 063. , [hep-ph]
  • Cacciari, M., Salam, G.P., Soyez, G., FastJet user manual (2012) Eur. Phys. J. C, 72, p. 1896. , [hep-ph]
  • (2017) Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1. Eur. Phys. J, , ATLAS CollaborationC 77, 490 hep-ex
  • (2015) Jet energy measurement and its systematic uncertainty in proton–proton collisions at √ s=7 TeV with the ATLAS detector. Eur. Phys. J, , ATLAS CollaborationC 75, 17 hep-ex
  • (2016) Performance of pile-up mitigation techniques for jets in pp collisions at √ s=8 TeV using the ATLAS detector. Eur. Phys. J, , ATLAS CollaborationC 76, 581 hep-ex
  • (2016) Performance of b-jet identification in the ATLAS experiment, , ATLAS CollaborationJINST 11, P04008 hep-ex
  • (2017) Performance of algorithms that reconstruct missing transverse momentum in √ s=8 TeV proton–proton collisions in the ATLAS detector. Eur. Phys. J, , ATLAS CollaborationC 77, 241 hep-ex
  • (2015) Performance of the ATLAS muon trigger in pp collisions at √ s=8 TeV. Eur. Phys. J, , ATLAS CollaborationC 75, 120 hep-ex
  • (2013) Jet energy measurement with the ATLAS detector in proton–proton collisions at √ s=7 TeV. Eur. Phys. J, , ATLAS CollaborationC 73, 2304 hep-ex
  • (2014) Estimation of non-prompt and fake lepton backgrounds in final states with top quarks produced in proton–proton collisions at √ s=8 TeV with the ATLAS Detector, , https://cds.cern.ch/record/1951336, ATLAS CollaborationATLAS-CONF-2014-058
  • A neural Bayesian estimator for conditional probability densities (2004), , M. Feindt physics.data-an
  • Feindt, M., Kerzel, U., The NeuroBayes neural network package (2006) Nucl. Instrum. Methods A, 559, p. 190
  • (2015) Measurement of the top quark mass in the tt¯ lepton+jets and tt¯ dilepton channels using √ s=7 TeV ATLAS data. Eur. Phys. J, , ATLAS CollaborationC 75, 330 hep-ex
  • (2016) Measurement of the top quark mass using proton-proton data at √ s=7 and 8 TeV. Phys. Rev, , CMS CollaborationD 93, 072004 hep-ex
  • (2008) Precise measurement of the top quark mass from lepton+jets events at D0. Phys. Rev. Lett, , D0 Collaboration101, 182001 hep-ex
  • (2012) Precision top-quark mass measurements at CDF. Phys. Rev. Lett, , CDF Collaboration109, 152003 hep-ex
  • (2015) Data-driven determination of the energy scale and resolution of jets reconstructed in the ATLAS calorimeters using dijet and multijet events at √ s=8 TeV, , https://cds.cern.ch/record/2008678, ATLAS CollaborationATLAS-CONF-2015-017
  • (2015) Determination of the jet energy scale and resolution at ATLAS using Z / γ -jet events in data at √ s=8 TeV, , https://cds.cern.ch/record/2059846, ATLAS CollaborationATLAS-CONF-2015-057
  • Calibration of the performance of b-tagging for c and light-flavour jets in the 2012 ATLAS data (2014) ATLAS-CONF-2014-046, , https://cds.cern.ch/record/1741020
  • Calibration of b-tagging using dileptonic top pair events in a combinatorial likelihood approach with the ATLAS experiment (2014) ATLAS-CONF-2014-004, , https://cds.cern.ch/record/1664335
  • Butterworth, J., PDF4LHC recommendations for LHC Run II (2016) J. Phys. G, 43, p. 023001. , [hep-ph]
  • (2016) Luminosity determination in pp collisions at √ s=8 TeV using the ATLAS detector at the LHC. Eur. Phys. J, , ATLAS CollaborationC 76, 653 hep-ex
  • Todesco, E., Wenninger, J., Large hadron collider momentum calibration and accuracy (2017) Phys. Rev. Accel. Beams, 20, p. 081003
  • (2013) Measurement of the cross-section for W boson production in association with b-jets in pp collisions at √ s=7 TeV with the ATLAS detector, , ATLAS CollaborationJHEP 06, 084 hep-ex
  • (2014) Measurement of the tt¯ production cross-section using eμ events with b-tagged jets in pp collisions at √ s=7 and 8 TeV with the ATLAS detector. Eur. Phys. J, , ATLAS CollaborationC 74, 3109 hep-ex
  • ATL-GEN-PUB-2016-002, , https://cds.cern.ch/record/2202407, ATLAS Collaboration, ATLAS computing acknowledgements

Citas:

---------- APA ----------
(2018) . Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at √s=8TeV with the ATLAS detector. European Physical Journal C, 78(6).
http://dx.doi.org/10.1140/epjc/s10052-018-5904-z
---------- CHICAGO ----------
Aaboud, M. "Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at √s=8TeV with the ATLAS detector" . European Physical Journal C 78, no. 6 (2018).
http://dx.doi.org/10.1140/epjc/s10052-018-5904-z
---------- MLA ----------
Aaboud, M. "Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at √s=8TeV with the ATLAS detector" . European Physical Journal C, vol. 78, no. 6, 2018.
http://dx.doi.org/10.1140/epjc/s10052-018-5904-z
---------- VANCOUVER ----------
Aaboud, M. Measurement of the inclusive and fiducial tt¯ production cross-sections in the lepton+jets channel in pp collisions at √s=8TeV with the ATLAS detector. Eur. Phys. J. C. 2018;78(6).
http://dx.doi.org/10.1140/epjc/s10052-018-5904-z