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Event Selection and Categorization

  • Luca Cadamuro
Chapter
Part of the Springer Theses book series (Springer Theses)

Abstract

The exploration of Higgs boson pair production in the Open image in new window decay channel requires the experimental capability to identify and reconstruct several different types of final state objects and to use them for the selection of signal-like events. This in turn requires the reconstruction of the Open image in new window and Open image in new window decays and the usage of their properties to identify the specific signature of signal events and to reject background ones. These selections and techniques globally constitute the “analysis strategy”, the backbone of the Open image in new window search to which this chapter is devoted. After introducing the experimental challenges of the Open image in new window decay channel, the discussion focuses on the experimental signature of the signal processes under study and on the main background sources, and on the analysis strategy developed. The analysis strategy description is structured in four main parts, corresponding to trigger requirements, object preselections, event categorization, and definition of the signal regions.

References

  1. 1.
    CMS Collaboration, Search for non-resonant Higgs Boson pair production in the \(\rm {b}\overline{b}\)\(\tau ^{+}\tau ^{-}\) final state, CMS Physics Analysis Summary CMS-PAS-HIG-16-012, CERN (2016), https://cds.cern.ch/record/2139324
  2. 2.
    CMS Collaboration, Search for resonant Higgs Boson pair production in the \(\rm b\overline{b}\)\(\tau ^{+}\tau ^{-}\) final state, CMS Physics Analysis Summary CMS-PAS-HIG-16-013, CERN (2016), https://cds.cern.ch/record/2139315
  3. 3.
    CMS Collaboration, Search for non-resonant Higgs Boson pair production in the \(\rm {bb}\)\(\tau \tau \) final state, CMS Analysis Note AN-2015/315, CERN (2015). Access restricted to CMS members, http://cms.cern.ch/iCMS/jsp/db_notes/noteInfo.jsp?cmsnoteid=CMS20AN-2015/315
  4. 4.
    CMS Collaboration, Search for resonant Higgs Boson pair production in the \(\rm {bb}\)\(\tau \tau \) final state, CMS Analysis Note AN-2016/006, CERN (2016). Access restricted to CMS members, http://cms.cern.ch/iCMS/jsp/db_notes/noteInfo.jsp?cmsnoteid=CMS20AN-2016/006
  5. 5.
    CMS Collaboration, Search for non-resonant Higgs Boson pair production in the bbtautau final state using 2016 data, CMS Physics Analysis Summary CMS-PAS-HIG-16-028, CERN (2016), https://cds.cern.ch/record/2204934
  6. 6.
    CMS Collaboration, Search for resonant Higgs Boson pair production in the \(\rm b\overline{b}\)\(\tau ^{+}\tau ^{-}\) final state using 2016 data, CMS Physics Analysis Summary CMS-PAS-HIG-16-029, CERN (2016), https://cds.cern.ch/record/2204936
  7. 7.
    CMS Collaboration, Search for non-resonant Higgs Boson pair production in the \(\rm {bb}\)\(\tau \tau \) final state with 2016 data, CMS Analysis Note AN-2016/232, CERN (2016). Access restricted to CMS members, http://cms.cern.ch/iCMS/jsp/db_notes/noteInfo.jsp?cmsnoteid=CMS20AN-2016/232
  8. 8.
    CMS Collaboration, Search for resonant Higgs Boson pair production in the \(\rm {bb}\)\(\tau \tau \) final states with 2016 datasets, CMS Analysis Note AN-2016/186, CERN (2016). Access restricted to CMS members, http://cms.cern.ch/iCMS/jsp/db_notes/noteInfo.jsp?cmsnoteid=CMS20AN-2016/186
  9. 9.
    CMS Collaboration, Search for pair production of Higgs Bosons in the two tau leptons and two bottom quarks final state using proton-proton collisions at \(\sqrt{s} = 13~\rm TeV\), CMS Physics Analysis Summary CMS-PAS-HIG-17-002, CERN (2017), https://cds.cern.ch/record/2256096
  10. 10.
    CMS Collaboration, Search for Higgs Boson pair production in the \(\rm {bb}\)\(\tau \tau \) final state with the CMS detector at the LHC, CMS Analysis Note AN-2017/007, CERN (2017). Access restricted to CMS members, http://cms.cern.ch/iCMS/jsp/db_notes/noteInfo.jsp?cmsnoteid=CMS20AN-2017/007
  11. 11.
    L. Cadamuro, Search and prospects for HH production, CMS Conference Report CMS-CR-2017-126, CERN (2017). To be published in the proceedings of the 52nd Rencontres de Moriond, https://cds.cern.ch/record/2286053
  12. 12.
    CMS Collaboration, Search for Higgs Boson pair production in events with two bottom quarks and two tau leptons in proton-proton collisions at \(\sqrt{(}s) = 13\) TeV (2017). Submitted to Phys. Lett. B, arXiv:1707.02909
  13. 13.
    Particle Data Group Collaboration, Review of particle physics. Chin. Phys. C 40, 100001 (2016).  https://doi.org/10.1088/1674-1137/40/10/100001CrossRefGoogle Scholar
  14. 14.
    CMS Collaboration, Search for resonant pair production of Higgs Bosons decaying to \(b\bar{b}\) and \(\tau ^+\tau ^-\) in proton-proton collisions at \(\sqrt{s} = 8\) TeV, CMS Physics Analysis Summary CMS-PAS-EXO-15-008, CERN (2015), https://cds.cern.ch/record/2125293
  15. 15.
    J.H. Friedman, Greedy function approximation: a gradient boosting machine. Ann. Stat. 29, 1189 (2001).  https://doi.org/10.1214/aos/1013203451MathSciNetCrossRefGoogle Scholar
  16. 16.
    A. Hoecker et al., TMVA - toolkit for multivariate data analysis. PoS ACAT, 040 (2007), arXiv:physics/0703039
  17. 17.
    CMS Collaboration, Performance of CMS Muon reconstruction in \(pp\) collision events at \(\sqrt{s}=7\) TeV. JINST 7, P10002 (2012).  https://doi.org/10.1088/1748-0221/7/10/P10002, arXiv:1206.4071CrossRefGoogle Scholar
  18. 18.
    CMS Collaboration, Reconstruction and identification of \(\tau \) lepton decays to hadrons and \(\nu _{\tau }\) at CMS. JINST 11, P01019 (2016).  https://doi.org/10.1088/1748-0221/11/01/P01019, arXiv:1510.07488
  19. 19.
    CMS Collaboration, Performance of reconstruction and identification of tau leptons in their decays to hadrons and tau neutrino in LHC Run-2, CMS Physics Analysis Summary CMS-PAS-TAU-16-002, CERN (2016), https://cds.cern.ch/record/2196972
  20. 20.
    CMS Collaboration, Performance of CMS Muon reconstruction in cosmic-ray events. JINST 5, T03022 (2010).  https://doi.org/10.1088/1748-0221/5/03/T03022, arXiv:0911.4994Google Scholar
  21. 21.
    CMS Collaboration, Search for new physics in same-sign dilepton events in proton-proton collisions at \(\sqrt{s} = 13\,\text{TeV} \). Eur. Phys. J. C 76, 439 (2016).  https://doi.org/10.1140/epjc/s10052-016-4261-z, arXiv:1605.03171
  22. 22.
    CMS Collaboration, Jet algorithms performance in 13 TeV data, CMS Physics Analysis Summary CMS-PAS-JME-16-003, CERN (2017), http://cds.cern.ch/record/2256875
  23. 23.
    A.J. Larkoski, S. Marzani, G. Soyez, J. Thaler, Soft drop. JHEP 2014, 146 (2014).  https://doi.org/10.1007/JHEP05(2014)146, arXiv:1402.2657
  24. 24.
    J.M. Butterworth, A.R. Davison, M. Rubin, G.P. Salam, Jet substructure as a new Higgs-search channel at the large Hadron collider. Phys. Rev. Lett. 100, 242001 (2008).  https://doi.org/10.1103/PhysRevLett.100.242001, arXiv:0802.2470
  25. 25.
    CMS Collaboration, Identification of b quark jets at the CMS experiment in the LHC run 2, CMS Physics Analysis Summary CMS-PAS-BTV-15-001, CERN (2016), https://cds.cern.ch/record/2138504
  26. 26.
    L. Bianchini, J. Conway, E.K. Friis, C. Veelken, Reconstruction of the Higgs mass in \(H \rightarrow \tau \tau \) events by dynamical likelihood techniques. J. Phys. Conf. Ser. 513, 022035 (2014).  https://doi.org/10.1088/1742-6596/513/2/022035Google Scholar
  27. 27.
    A. Oliveira, Gravity particles from warped extra dimensions, predictions for LHC (2014), arXiv:1404.0102
  28. 28.
    CMS Collaboration, Searches for a heavy scalar Boson H decaying to a pair of 125 GeV Higgs Bosons hh or for a heavy pseudoscalar Boson A decaying to Zh, in the final states with \(h \rightarrow \tau \tau \). Phys. Lett. B 755, 217 (2016).  https://doi.org/10.1016/j.physletb.2016.01.056, arXiv:1510.01181ADSCrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  1. 1.University of FloridaGainesvilleUSA

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