amnon harel aharel@fnal
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Non-SUSY searches in CMS. Amnon Harel [email protected]. Rencontres de Moriond – QCD session La Thuile, Italy March 21 st , 2011. Non-SUSY, non-Higgs, non-top, searches in CMS. Massimiliano Chiorboli’s talk . William Quayle’s talk. Jasmin Gruschke’s talk. In short – Exotica searches. W’?. - PowerPoint PPT PresentationTRANSCRIPT
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Amnon Harel [email protected] de Moriond QCD session La Thuile, ItalyMarch 21st, 2011 Non-SUSY searches in CMS
Amnon Harel
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Non-SUSY,non-Higgs,non-top,searches in CMSIn short Exotica searchesJasmin Gruschkes talk Massimiliano Chiorbolis talk William Quayles talk
Amnon Harel
Moriond QCD 2011
Exotica20 searches are detailed in:https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsEXO GKK?Leptoquark?MBH?
Amnon Harel
Moriond QCD 2011
Already publishedToo many new results to cover the published ones here see web page and / or backup slidesLeaving us with 15 new searches in 14 minutes. Hold on to your hats.Dijet resonance & ratioMicroscopic black holesStopped gluinosQuark compositeness will be in Francesco Pandolfis talk
Amnon Harel
Moriond QCD 2011
Extra dimensions in searchesADD modeln extra, compact dimensionsCompactified in an n-dimensional torusHierarchy problem:MPl~1019 GeV, MEW~102 GeVFinely spaced ( [TeV]22.3731.9841.77
Amnon Harel
Moriond QCD 2011
W searchReference model W has W-like fermionic couplings W does not couple to other gauge bosons Tevatron limits: mW > 1.1TeVarXiv:1012.4945 (hep-ex)arXiv:1103.0030 (hep-ex)MW>1.56 TeV
Amnon Harel
Moriond QCD 2011
b searchPair production of heavy, 4th generation b. Each btW (bWW)EXO-10-018Similar to new Tevatron limit: mb > 385 GeVDistinctive events.Selected based on leptons, NJets, and
Amnon Harel
Moriond QCD 2011
Excited lepton searchEXO-10-016Experimental signatureTwo isolated electrons/muons of opposite chargeIsolated photon ( R(,l)>0.5 )No events observed in signal regionsScale of lepton compositenessCI
Amnon Harel
Moriond QCD 2011
High pT Z boson productionReference model: weakly decaying excited quark q*qZq+- = mq* and f = f =1
Decay may be rare, but clean < 5% background (top pairs & di-bosons)
Gauge interaction
Contact interaction
>1.17 TeV for fS=0Exceed HERA limit >252 GeVEXO-10-025
Amnon Harel
Moriond QCD 2011
Leptoquark searchesLQlq/q, within the given SM generation. = BR(LQlq).Lets start with 1st generation:ST = scalar sum of jet and lepton pTseejj channelBR: 2ejj channelBR: (1- )
Amnon Harel
Moriond QCD 2011
Leptoquark limits1st generation2nd generationVery similar to the 1st generation channelsjj - arXiv:1012.4033 Accepted by PRLeejj - arXiv:1012.4031 Accepted by PRLejj EXO-10-006Exceed Tevatron limits (except at very low )
Amnon Harel
Moriond QCD 2011
Long lived slow particlesHeavy long-lived particles exist in many BSM models Heavy slow ( 311-398 GeV
Amnon Harel
Moriond QCD 2011
-jetsEXO-11-013Search for groups of collimated muons from new low mass resonancesStudied 3 SUSY with hidden valley scenariosModels motivated by PAMELAs positron excess-s clustered into nearby, pairs of opposite chargechannels [ ], [ ] [ ] (same mass), [ ], [ 5 ]For model dependent limits see note / webpage
Amnon Harel
Moriond QCD 2011
ConclusionThe standard model describes CMS data wellInformed you of 15 new Exotica searches, in 7 TeV pp collision data collected by CMS in 2010 at the LHC: All to prevent the above conclusion New = ~last two months Many set the most stringent limits to date Promising start expect much more data in 2011
For a closer look at these, at the 2 analyses presented in other talks (F. Pandolfis, J. Gruschkes), and at the 4 published results, see:https://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsEXOSummary
Amnon Harel
Moriond QCD 2011
Back up slides
Amnon Harel
Moriond QCD 2011
Stopped gluinosModelNew, heavy,quasi-stable particlesIn particular, split SUSYSearching for charged R-hadronsLifetime: 75ns 106s, mgluino: 150-500 GeVUp to 106s, since still expect to see an eventExperimental signatureOut of time energy deposits in calorimeters+ vetoes on cosmic rays, beam halo, detector noiseIllustration Only
Amnon Harel
Moriond QCD 2011
Dijet resonance searchModels dijet resonances common in new physics models eight specific models studies in paper signal models for qq, qg and gg final states also model-independent limitsPRL 105, 211801
ModelExclusion regions [TeV]String resonance0.50 2.50Excited quark0.50 1.58Axigluon / Coloron0.50 1.17 & 1.47 1.52E6 diquark0.50-0.58,0.97-1.08, &1.45-1.60
Amnon Harel
Moriond QCD 2011
Black hole searchN = Number of objectsST = scalar sum of pTs >50GeVExperimental signatureHawking radiation democratic productionAll objects selected with pT>20GeVMostly quarks & gluons jetsAlso electrons, photons and muonsLittle graviton radiation expected [Emparan et al., PRL 85 (2000) 499]
Lots (at least >2) of them with large total pT!ModelADDMicroscopic black holes in thermal equilibrium decay via Hawking radiationNeglect energy untrapped by the black hole - too model dependentPLB 697 (2011), 434
Amnon Harel
\textcolor[rgb]{1,1,1}{$\bar{M}_{Pl}=\frac{\left(M_5\right)^3}{k}\left(1-e^{-2kr_c\pi}\right)$}\textcolor[rgb]{1,1,1}{$\bar{M}_{Pl}^2=r^n M_{4+n}^{2+n}$}
Efficiencies 75%-80%. Di-muon mass resolution 6-10% (0.5-1TeV). Di-electron mass resolution ~1%. At least one electron in barrel |eta|