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Diboson resonance searches including HH in ATLAS and CMS in Run2 Savanna Shaw On behalf of the ATLAS and CMS collaborations 16-23 March 2019 Overview General strategy VV JJ (V=W,Z) HH bbbb VV leptons+jets VH

  1. Diboson resonance searches including HH in ATLAS and CMS in Run2 Savanna Shaw On behalf of the ATLAS and CMS collaborations 16-23 March 2019

  2. Overview • General strategy • VV → JJ (V=W,Z) • HH → bbbb • VV → leptons+jets • VH → leptons+bb • HH → WW+bb • HH → ττ bb • VV → leptons • HH → bb γγ • Combinations of results S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 2 / 18

  3. Motivation and General Strategy • Heavy resonances of vector bosons or Higgs bosons would be a sign of new physics at LHC • Many different models predicted, often motivated by hierarchy or naturalness arguments • Examples: extended Higgs sector (2HDM), heavy vector triplets (HVT - W’, Z’), Kaluza-Klein graviton from bulk Randall-Sundrum model • Search Strategy: • Select events based on final state of interest Background (leptons, missing E T , jets, etc) • Categorise events based on signal purity Signal (based on (di-)jet mass, jet substructure, b-tagging, number of leptons, etc) • Look at invariant mass of dibosons or output from multivariate analysis to search for resonant signal M X • Perform statistical analysis S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 3 / 18

  4. VV → JJ ATLAS-CONF-2019-003, CMS-B2G-017-001 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 4 / 18

  5. VV → JJ S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 5 / 18

  6. HH → 4b ATLAS-EXOT-2016-31, CMS-B2G-017-019 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 6 / 18

  7. HH → 4b Exclusion regions: Local signi fi cance, m=280 GeV: 3.6 σ Scalar: ~1-5000 fb (ATLAS) Global signi fi cance: 2.5 σ Radion: 1.6-67 fb (CMS) Graviton: 1.4-43.9 fb (CMS, k/Mpl=0.5) 313-1362 GeV (ATLAS, k/Mpl=1) S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 7 / 18

  8. VV → leptons+jets ATLAS-EXOT-2016-28,ATLAS-EXOT-2016-29, CMS-B2G-017-013, CMS-B2G-16-029, CMS-B2G-17-005 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 8 / 18

  9. VH → leptons+bb ATLAS-EXOT-2016-10, CMS-B2G-17-004, CMS-HIG-18-005 Similar to VV searches, but with H decaying to bb Events categorised based on number and fl avour of leptons, and number of b-tagged jets. S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 9 / 18

  10. VH → leptons+bb Exclusion regions: HVT: 0.8-60 fb (CMS) 0.9-280 fb (ATLAS) Scalar: 0.01-1pb (CMS, M<1 T eV only) 0.002-0.8 pb (ATLAS, 500 GeV M< 5 T eV) S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 10 / 18

  11. HH → bb+WW ATLAS-HIGG-2016-27, CMS-PAS-B2G-18-008 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 11 / 18

  12. HH → bb+WW 7.8-103 fb (CMS) 8.3-123 fb (CMS) S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 12 / 18

  13. HH → ττ bb ATLAS-HIGG-2016-16, CMS-B2G-17-006 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 13 / 18

  14. HH → ττ bb Exclusion regions: hMSSM: 305<M(X)<402 GeV (ATLAS) Radion: M<2.7 T eV (CMS) KK Graviton: 325<M(G)<885 GeV (ATLAS, k/Mpl=1) 5-80 fb (CMS, k/Mpl=0.5) S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 14 / 18

  15. VV → leptons ATLAS-EXOT-2016-11, CMS-B2G-17-023 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 15 / 18

  16. HH → bb γγ ATLAS-HIGG-2016-15, CMS-HIG-17-008 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 16 / 18

  17. Combinations ATLAS-CONF-2018-043, CMS-HIG-17-030,ATLAS-EXOT-2017-31, CMS-PAS-B2G-18-006 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 17 / 18

  18. Summary • Many results for searches for diboson resonances performed in a wide variety of final states • No indication of resonances so far S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 18 / 18

  19. Extra Information Backup S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 19 / 18

  20. References • VV → JJ (V=W,Z): ATLAS-CONF-2019-003, CMS-B2G-017-001 • HH → bbbb: ATLAS-EXOT-2016-31, CMS-B2G-017-019 • VV → leptons+jets: ATLAS-EXOT-2016-28,ATLAS-EXOT-2016-29, CMS-B2G-017-013, CMS-B2G-16-029, CMS-B2G-17-005 • VH → leptons+bb: ATLAS-EXOT-2016-10, CMS-B2G-17-004, CMS-HIG-18-005 • HH → leptons(incl. taus)+jets: ATLAS-HIGG-2016-27, ATLAS-HIGG-2016-16, CMS-HIG-17-006, CMS-B2G-17-006, CMS-PAS-B2G-18-008 • VV → leptons: ATLAS-EXOT-2016-11, CMS-B2G-17-023 • HH → bb γγ ATLAS-HIGG-2016-15, CMS-HIG-17-008 • HH combination: ATLAS-CONF-2018-043, CMS-HIG-17-030 • VV/VH combination: ATLAS-EXOT-2017-31, CMS-PAS-B2G-18-006 • HH → WW γγ ATLAS-HIGG-2016-20, CMS-HIG-17-006 • HH → WWWW: ATLAS-HIGG-2016-24 S. Shaw (Manchester) MoriondEW 2019 16-23 March 2019 20 / 18

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