Upload
beverly-tucker
View
215
Download
0
Embed Size (px)
Citation preview
1G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
Search for exotic resonances &
MSSM Higgs bosonsat
CMS/LHC
G. Daskalakis
2G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
CMS Experiment
LHC machine stopped p-p collisions mid-December 2012.
CMS detector performance was excellent!
~ 250 papers in various physics topics.
8 TeV
3G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
2012 Activities in CMS
RUNNIG PHASEService Work - ECAL Dead Channel recovery algorithms- FAST SIMULATION validation
PHYSICS ANALYSISExotic Searches ( Z’e+e- : ~ 5 fb-1 2012, full data 2013 )Exotic Searches ( W’WZ(lv)(jj) : ongoing )MSSM Higgs Searches ( AZhllbb : ongoing )
EDUCATIONPractice 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)
4G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
2012 Service for INPP
Service Work for “ ΚΡΗΠΙΣ ”
1 400 000 euros
5G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
Z’Z’ee++ee-- Searches (2012) Searches (2012)P
hys
. Let
t. B
720
(20
13)
63
Part of the INPP obligations THALIS program ( GENESIS@LHC )
INPP team : V.Giakoumopoulou, S.Kesisoglou, G.Daskalakis
Well integrated within EXOTICA CMS group. More details from V.Giakoumopoulou.
6G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
ZZ'ee++ee-- Searches (2012) 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.
Exclusion limits:- Sequential Standard Model Z'SSM resonance 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).
7G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
ZZ'ee++ee-- Searches (PDF Uncertainties) 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% -//-
8G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
ZZ'ee++ee-- Searches (PDF Uncertainties) Searches (PDF Uncertainties)
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.
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.
9G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
ECAL Energy Recovery AlgorithmsECAL Energy Recovery AlgorithmsINPP 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.
10G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
ECAL Energy Recovery AlgorithmsECAL Energy Recovery Algorithms
Energy resolution in ECAL Barrel
11G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
WW''WZWZlvjj lvjj Searches Searches Part of the INPP obligations THALIS program ( GENESIS@LHC )
INPP team : S.Kesisoglou, G.Daskalakis, K. Kousouris (CERN)
First steps in the analysis & feasibility studies. More details from S.Kesisoglou.
Results from W'lv
EX
O-1
2-06
0
EX
O-1
2-14
12G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
MSSM Higgs Searches MSSM Higgs Searches Part of the INPP obligations THALIS program ( GENESIS@LHC )
INPP team : V.Giakoumopoulou, G.Anagnostou, T. Geralis, G. Daskalakis
Integrated within Hbb & HiggsEXO CMS groups. Details from V.Giakoumopoulou.
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, ppbbA.
Largest Br(AZh) : low tan & Mz+Mh MA 2Mtop.
First steps in the analysis & feasibility studies.
13G. Daskalakis “Exotic resonances & MSSM Higgs searches at CMS/LHC” - 3 rd Annual INPP Meeting (17 June 2013)
MSSM Higgs Searches MSSM Higgs Searches
A. Djouadi & J. Quevillon: arXiv:1304.1787v1 [hep-ph] 5 Apr 2013
• 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