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Search for exotic resonances & MSSM Higgs bosons at CMS/LHC

Search for exotic resonances & MSSM Higgs bosons at CMS/LHC. G. Daskalakis. CMS Experiment. 8 TeV. LHC machine stopped p-p collisions mid-December 2012. CMS detector performance was excellent! ~ 250 papers in various physics topics. 201 2 Activities in CMS. PHYSICS ANALYSIS

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Search for exotic resonances & MSSM Higgs bosons at CMS/LHC

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  1. Search for exotic resonances & MSSM Higgs bosons at CMS/LHC G. Daskalakis

  2. CMS Experiment 8 TeV LHC machine stopped p-p collisions mid-December 2012. CMS detector performance was excellent! ~ 250 papers in various physics topics.

  3. 2012 Activities in CMS • PHYSICS ANALYSIS • Exotic Searches ( Z’e+e- : ~ 5 fb-1 2012, full data 2013 ) • Exotic Searches ( W’WZ(lv)(jj) : ongoing ) • MSSM Higgs Searches (AZhllbb : ongoing ) • RUNNIG PHASE • Service Work- ECAL Dead Channel recovery algorithms- FAST SIMULATION validation • EDUCATION • Practice work (Marios Maroudas, University of Patras) • “Theories that predict additional heavy W’ & Z’ bosons” • CMS ARC (Analysis Review Committee) • Electron Charge Asymmetry in Inclusive W Production (SMP-12-001) • Published in Phys. Rev. Lett. 109, 111806 (2012) ( G.D. served as ARC chair) • International Conferences (on behalf of CMS) • Standard Model @ LHC 2012 (Inclusive W & Z measurements in CMS)

  4. 2012 Service for INPP Service Work for “ ΚΡΗΠΙΣ ” 1 400 000 euros

  5. Z’e+e- Searches (2012) Part of the INPP obligationsTHALIS program ( GENESIS@LHC ) INPP team : V.Giakoumopoulou, S.Kesisoglou, G.Daskalakis Well integrated within EXOTICA CMS group. More details from V.Giakoumopoulou. Phys. Lett. B 720 (2013) 63

  6. Z'e+e- Searches (2012) Data samples: 5.3 fb-1(7 TeV) +4.1 fb-1(8 TeV) The full 8 TeV dataset (20 fb-1) was also analyzed in 2013. Results: No evidence for a heavy narrow resonance is observed. Exclusionlimits: - Sequential Standard ModelZ'SSMresonance lighter than 2590 GeV, - Superstring-inspired Z'Ψ lighter than 2260 GeV, - Kaluza-Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter k/ΜPl is 0.10 (0.05).

  7. Z'e+e- Searches (PDF Uncertainties) Goal: PDF uncertainties for the normalized DY cross sections to the Z peak. Directly used in the Z’ search. Details: Full study in NNLO & NLO in QCD. PDF sets: MSTW2008, CTEQ12, NNPDF21 Cross section estimations: Fully Exclusive W and Z package, FEWZ [2], at 68% C.L. Results: 250 GeV ~ 3-4% relative uncertainty 3 TeV ~ 33% -//-

  8. Z'e+e- Searches (PDF Uncertainties) NNLO/NLO cross sections for MSTW2008, CTEQ12 and NNPDF21 PDF versus the di-lepton invariant mass. NNLO calculations with different PDF sets introduces uncertainties which are not covered by the PDF4LHC recipe for NNLO uncertainties based on NLO extrapolations. PDF uncertainty of the cross section ratios versus the di-lepton invariant mass. PDF4LHC recipe applied on NNLO estimations from MSTW2008, CTEQ12 and NNPDF21 PDF sets.

  9. ECAL Energy Recovery Algorithms INPP team : V.Giakoumopoulou, S.Kesisoglou, G.Daskalakis Well integrated within ECAL Detector Performance CMS group. More details from S.Kesisoglou Goals/Results: Recovery of the energy of non-functioning ECAL crystals. Corrections for isolated electrons or photons. Corrections for ECAL Barrel & Endcaps. Official code in CMS Framework. To be used by several physics studies & searches.

  10. ECAL Energy Recovery Algorithms Energy resolution in ECAL Barrel

  11. W'WZlvjj Searches Results from W'lv EXO-12-060 Part of the INPP obligationsTHALIS program ( GENESIS@LHC ) INPP team : S.Kesisoglou, G.Daskalakis, K. Kousouris (CERN) First steps in the analysis & feasibility studies. More details from S.Kesisoglou. EXO-12-14

  12. MSSM Higgs Searches • Looking for the CP-odd pseudoscalar Higgs (A) via its decay into a Z boson and the lighter CP-even scalar Higgs (h) which might be the Higgs-like boson recently discovered. • Main production mechanism for A: gg A, ppbbA. • Largest Br(AZh) : low tan & Mz+Mh MA 2Mtop. • First steps in the analysis & feasibility studies. Part of the INPP obligationsTHALIS program ( GENESIS@LHC ) INPP team : V.Giakoumopoulou, G.Anagnostou, T. Geralis, G. Daskalakis Integrated within Hbb & HiggsEXO CMS groups. Details from V.Giakoumopoulou.

  13. MSSM Higgs Searches • Implication of Higgs discovery at Mh = 126 GeV  SUSY scale in MSSM might be high MS>>MZ • The unknown scale MS and some other leading SUSY parameters can be traded against the measured value of Mh, leaving only MA & tanβ as free parameters in the Higgs sector. • Phenomenological consequence of high MS values  reopen the low tanβ region , tanβ  3-5 A. Djouadi & J. Quevillon: arXiv:1304.1787v1 [hep-ph] 5 Apr 2013

  14. SUMMARY model

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