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 observation of Higgs boson production in association with a top quark pair (tt¯H), based on the analysis of proton–proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider, is presented. Using data corresponding to integrated luminosities of up to 79.8 fb −1 , and considering Higgs boson decays into bb¯, WW ⁎ , τ + τ − , γγ, and ZZ ⁎ , the observed significance is 5.8 standard deviations, compared to an expectation of 4.9 standard deviations. Combined with the tt¯H searches using a dataset corresponding to integrated luminosities of 4.5 fb −1 at 7 TeV and 20.3 fb −1 at 8 TeV, the observed (expected) significance is 6.3 (5.1) standard deviations. Assuming Standard Model branching fractions, the total tt¯H production cross section at 13 TeV is measured to be 670 ± 90 (stat.) −100 +110 (syst.) fb, in agreement with the Standard Model prediction. © 2018 The Author(s)

Registro:

Documento: Artículo
Título:Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
Autor:Aaboud, M. et al.
Este artículo contiene 2920 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 2920 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Año:2018
Volumen:784
Página de inicio:173
Página de fin:191
DOI: http://dx.doi.org/10.1016/j.physletb.2018.07.035
Título revista:Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Título revista abreviado:Phys Lett Sect B Nucl Elem Part High-Energy Phys
ISSN:03702693
CODEN:PYLBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v784_n_p173_Aaboud

Referencias:

  • Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC (2012) Phys. Lett. B, 716, p. 1
  • Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC (2012) Phys. Lett. B, 716, p. 30
  • Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at s=7 and 8 TeV (2016) J. High Energy Phys., 8
  • Evidence for the H→bb¯ decay with the ATLAS detector (2017) J. High Energy Phys., 12
  • Measurement of the Higgs boson coupling properties in the H→ZZ ⁎ →4ℓ decay channel at s=13 TeV with the ATLAS detector (2018) J. High Energy Phys., 3
  • Measurements of Higgs boson properties in the diphoton decay channel with 36 fb −1 of pp collision data at s=13 TeV with the ATLAS detector (2018); Observation of the Higgs boson decay to a pair of τ leptons with the CMS detector (2018) Phys. Lett. B, 779, p. 283
  • Evidence for the Higgs boson decay to a bottom quark–antiquark pair (2018) Phys. Lett. B, 780, p. 501
  • Luminosity determination in pp collisions at s=8 TeV using the ATLAS detector at the LHC (2016) Eur. Phys. J. C, 76, p. 653
  • Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector (2018) Phys. Rev. D, 97
  • Observation of tt¯H production (2018); The ATLAS experiment at the CERN Large Hadron Collider (2008) J. Instrum., 3
  • (2010), https://cds.cern.ch/record/1291633, ATLAS Insertable B-Layer Technical Design Report, ATLAS-TDR-19; ATLAS Insertable B-Layer Technical Design Report Addendum (2012), https://cds.cern.ch/record/1451888, ATLAS-TDR-19-ADD-1; Electron and Photon Reconstruction and Performance in ATLAS Using a Dynamical, Topological Cell Clustering-Based Approach (2017), https://cds.cern.ch/record/2298955, ATL-PHYS-PUB-2017-022; Search for the Standard Model Higgs boson produced in association with top quarks and decaying into a bb¯ pair in pp collisions at s=13 TeV with the ATLAS detector (2018) Phys. Rev. D, 97
  • Measurements of the Higgs boson production and decay rates and coupling strengths using pp collision data at s=7 and 8 TeV in the ATLAS experiment (2016) Eur. Phys. J. C, 76, p. 6
  • Search for the Standard Model Higgs boson decaying into bb¯ produced in association with top quarks decaying hadronically in pp collisions at s=8 TeV with the ATLAS detector (2016) J. High Energy Phys., 5
  • Search for the Standard Model Higgs boson produced in association with top quarks and decaying into bb¯ in pp collisions at s=8 TeV with the ATLAS detector (2015) Eur. Phys. J. C, 75, p. 349
  • Search for the associated production of the Higgs boson with a top quark pair in multilepton final states with the ATLAS detector (2015) Phys. Lett. B, 749, p. 519
  • Search for H→γγ produced in association with top quarks and constraints on the Yukawa coupling between the top quark and the Higgs boson using data taken at 7 TeV and 8 TeV with the ATLAS detector (2015) Phys. Lett. B, 740, p. 222
  • Combined measurement of the Higgs boson mass in pp collisions at s=7 and 8 TeV with the ATLAS and CMS experiments (2015) Phys. Rev. Lett., 14
  • Performance of b-jet identification in the ATLAS experiment (2016) J. Instrum., 11
  • Expected Performance of the ATLAS b-Tagging Algorithms in Run-2 https://cds.cern.ch/record/2037697, ATL-PHYS-PUB-2015-022, 2015; Measurements of b-jet tagging effciency with the ATLAS detector using tt¯ events at s=13 TeV (2018); Chen, T., Guestrin, C., XGBoost: a scalable tree boosting system arXiv:1603.02754 [cs.LG]; Nason, P., A new method for combining NLO QCD with shower Monte Carlo algorithms (2004) J. High Energy Phys., 11
  • Frixione, S., Nason, P., Oleari, C., Matching NLO QCD computations with parton shower simulations: the POWHEG method (2007) J. High Energy Phys., 11
  • Alioli, S., Nason, P., Oleari, C., Re, E., A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX (2010) J. High Energy Phys., 6
  • Nason, P., Oleari, C., NLO Higgs boson production via vector-boson fusion matched with shower in POWHEG (2010) J. High Energy Phys., 2
  • Campbell, J.M., NLO Higgs boson production plus one and two jets using the POWHEG BOX, MadGraph4 and MCFM (2012) J. High Energy Phys., 7
  • Luisoni, G., Nason, P., Oleari, C., Tramontano, F., HW ± /HZ + 0 and 1 jet at NLO with the POWHEG BOX interfaced to GoSam and their merging within MiNLO (2013) J. High Energy Phys., 10
  • Hamilton, K., Nason, P., Re, E., Zanderighi, G., NNLOPS simulation of Higgs boson production (2013) J. High Energy Phys., 10
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., PYTHIA 6.4 physics and manual (2006) J. High Energy Phys., 5
  • Sjöstrand, T., Mrenna, S., Skands, P.Z., A brief introduction to PYTHIA 8.1 (2008) Comput. Phys. Commun., 178, p. 852
  • Alwall, J., The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014) J. High Energy Phys., 7
  • Wiesemann, M., Higgs production in association with bottom quarks (2015) J. High Energy Phys., 2
  • de Florian, D., Handbook of LHC Higgs cross sections, 4: deciphering the nature of the Higgs sector (2016); Measurement of inclusive and differential cross sections in the H→ZZ ⁎ →4ℓ decay channel in pp collisions at s=13 TeV with the ATLAS detector (2017) J. High Energy Phys., 10
  • Measurements of fiducial cross-sections for tt¯ production with one or two additional b-jets in pp collisions at s=8 TeV using the ATLAS detector (2016) Eur. Phys. J. C, 76, p. 11
  • Measurement of differential production cross-sections for a Z boson in association with b-jets in 7 TeV proton–proton collisions with the ATLAS detector (2014) J. High Energy Phys., 10
  • 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 (2013) J. High Energy Phys., 6
  • Bahr, M., Herwig++ physics and manual (2008) Eur. Phys. J. C, 58, p. 639
  • Bellm, J., Herwig++ 2.7 release note (2013); Raitio, R., Wada, W.W., Higgs boson production at large transverse momentum in QCD (1979) Phys. Rev. D, 19, p. 941
  • Kunszt, Z., Associated production of heavy Higgs boson with top quarks (1984) Nucl. Phys. B, 247, p. 339
  • Beenakker, W., Higgs radiation off top quarks at the Tevatron and the LHC (2001) Phys. Rev. Lett., 87
  • Beenakker, W., NLO QCD corrections to tt¯H production in hadron collisions (2003) Nucl. Phys. B, 653, p. 151
  • Dawson, S., Orr, L., Reina, L., Wackeroth, D., Next-to-leading order QCD corrections to pp→tt¯h at the CERN Large Hadron Collider (2003) Phys. Rev. D, 67
  • Dawson, S., Jackson, C., Orr, L., Reina, L., Wackeroth, D., Associated Higgs production with top quarks at the large hadron collider: NLO QCD corrections (2003) Phys. Rev. D, 68
  • Zhang, Y., Ma, W.-G., Zhang, R.-Y., Chen, C., Guo, L., QCD NLO and EW NLO corrections to tt¯H production with top quark decays at hadron collider (2014) Phys. Lett. B, 738, p. 1
  • Frixione, S., Hirschi, V., Pagani, D., Shao, H.S., Zaro, M., Weak corrections to Higgs hadroproduction in association with a top-quark pair (2014) J. High Energy Phys., 9
  • Frixione, S., Hirschi, V., Pagani, D., Shao, H.-S., Zaro, M., Electroweak and QCD corrections to top-pair hadroproduction in association with heavy bosons (2015) J. High Energy Phys., 6
  • Hoecker, A., TMVA – toolkit for multivariate data analysis (2007); Procedure for the LHC Higgs Boson Search Combination in Summer 2011 (2011), https://cds.cern.ch/record/1379837, CMS-NOTE-2011-005, ATL-PHYS-PUB-2011-11; ATLAS Computing Acknowledgements https://cds.cern.ch/record/2202407, ATL-GEN-PUB-2016–002

Citas:

---------- APA ----------
(2018) . Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 784, 173-191.
http://dx.doi.org/10.1016/j.physletb.2018.07.035
---------- CHICAGO ----------
Aaboud, M. "Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 784 (2018) : 173-191.
http://dx.doi.org/10.1016/j.physletb.2018.07.035
---------- MLA ----------
Aaboud, M. "Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector" . Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 784, 2018, pp. 173-191.
http://dx.doi.org/10.1016/j.physletb.2018.07.035
---------- VANCOUVER ----------
Aaboud, M. Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector. Phys Lett Sect B Nucl Elem Part High-Energy Phys. 2018;784:173-191.
http://dx.doi.org/10.1016/j.physletb.2018.07.035