Not-SUSY-Nor-Higgs Exotic Searches at TeVatron Run II

Marumi KadoLAL-Orsay

Synopsis, Selected TopicsBSM theory

Vs. TopologyADD RS Z’ LQ TC EL EQ

ee/

ee

e Model Independent*

e/+jets

Jets+MET

Mono-Jet

Di-jets

+MET Run I

Topics will be discussed in three main classes : - Searches for high mass resonances- Searches for new particles decaying to visible known particles- Search for particles escaping undetected in topologies with MET

All limits will be given at the 95% Confidence Level

*Upon request

Search for High Mass ResonancesDiLepton and DiPhoton High Mass Analyses

Simple event selection : Two flavor-like and opposite-charge leptons (e or ) or photons with PT / ET in excess typically of 25 GeV/c

Interpretation of the ℓℓ invariant mass spectrum…

…DØ Model dependent interpretation…CDF less model dependence, only

spin assumption (0,1,2)

For instance in ED models :

200 pb-1

ℓℓ Interpretation in terms of Z’ and Little Higgs Searches

channel L (pb-1) ZI Z Z Z

CDFee 200 570 610 625 650

126 425 455 465 495

DØ ee 200 575 640 650 680

CDF and DØ have excluded Z’ masses in the E6 Grand Unified ModelCDF uses fits to the invariant di-lepton mass assuming a spin-1 resonance

CDF has also interpreted this search in the Little Higgs Model which predicts a heavy neutral boson Zh (for cotan =1) :

SM like Z’Ruled out ~2TeV by LEP

ee : :

Different E6 models

Different E6 models

Within E6 models limits better than LEP indirect limits

200 pb-1

GeV/c 825 2Zh

M GeV/c 790 2Zh

M

ℓℓ and Interpretation in terms of RS Resonance

Hierarchy problem solved with one warped ED in a 5D AdS Space with metric :

The smaller k/MPl the narrower the first KK excitation, but smaller

CDF uses fits to the invariant di-lepton mass assuming a spin-2 resonance

222 dydxdxeds ky

Cross Section Limits for different k/MPl

Exclusion domains in the RS graviton model

ee

The exclusion profits from a higher BR at high mass

ee

DØ 200 pb-1

DØ (ee) ~ CDF

Search For High Mass Resonances in the Dijet Mass Spectrum

CDF have interpreted their 75 pb-1 Dijet mass spectrum… searching for

resonances coupling strongly

Excluding RS graviton between ~220 and 840 GeV/c2 (k/MPl=0.3)

Excluding exotic particle masses (axigluon, Excited Quark, color octet Technirho)

between ~280 and 410 GeV/c2

Axigluon reach up to 1,1 TeV/c2

A Non-Resonant Case (due to the mass continuum of the KK states) : ADD models

Hierarchy problem using n large compactified EDs :

In the ADD case the search is based on the dilepton and diphoton differential

nnSPl RMM 2

284

,*

2

,*

2

coscos

SMMM

KK Graviton exchange

Interference

DØ Inclusive approach including e and as “EM” objects Two dimensional binned likelihood fit M2EM and cos With 200 pb-1 (Combined with Run I) :

Same in with 100 pb-1 :

CDF Simple fit to Mee with 200 pb-1 :

TeV 1.43 S M

TeV 0.88 S M

TeV 1.11 S M

4

1

SMLimits given in the GRW model where :

Search for Excited Leptons Radiative Decays : the eeTopology

New Particles Decaying to known Ones

CDF has performed a model dependent search (200 pb-1) :

Contact interactionGauge boson

mediated

GeV/c 889 2

e* M GeV/c 208 2

e* MFor Me* =

~3 bkg. events expected and 3 events observed

Two signal production models considered :

For Me* = f

Searches for LeptoQuarks

LQ are produced in pairs at TeVatron :

LeptoQuarks are bosons with color and fractional electric charges and with both baryon and lepton numbers predicted in GU theories

LeptoQuarks couple to lepton and quarks of the same generation

Charged leptons coupling parameter =BR(LQ→(e,)q)

Searched for the first and second generation in three main topologies :- Two leptons and two jets (eejj, jj) - One Lepton and two jets and MET (ejj)- Two Jets and MET (jj)

Searches for First Generation LeptoQuarks

DØ performed a combined search for first generation LQs in both the eejj and ejj channels within 175 pb-1 :

eejj selection : Two isolated electrons and two jets, the radiative Z events are removed by an ee invariant mass cut, a large total ET is required

ejj selection : One isolated electron, two jets and MET (isolated from the lepton), high MT

e and a large total ET

~0.4 bkg. events expected and 0 events observed

1)( GeV/c 238 2 LQM

0.5)( GeV/c 194 2 LQM~4.7 bkg. events expected and 2 events observed

Combined Result

Search for Second Generation LeptoQuarks

CDF performed a search for second generation LQs in the jj channels within 200 pb-1 :

jj selection : Similar event selection as in the eejj channel with an additional cut in the PT

m vs. ETj

~3.1 bkg. events expected and 2 events observed

1)( GeV/c 240 2 LQM

Search Independent of the LeptoQuark Generation

jj selection : Lepton veto, two or three Jets and MET isolated from the jets

CDF performed a search for any generation LQs in the jj channel within 191 pb-1 :

~118 bkg. events expected and 124 events observed

0)( GeV/c 78 or GeV/c 117 22 LQLQ MM

Search for Particles Undetected in Topologies with METJets+MET/Monojet Analysis

DØ performed a search for large extra dimensions (ADD) in the Jets+MET channel within 85 pb-1 :

KK gravitons produced with one or more jets

Monojet selection : At least one jet with 150 GeV ET and MET (isolated from the jet) in excess of 150 GeV

LEP

~100 bkg. events expected and 84 events observed

Limit on MS vs. n :

No k factor

ConclusionDØ and CDF have analyzed up to 200 pb-1 of data in the framework of

searches for Not-SUSY-Nor-Higgs Searches and have exceeded the Run I performance in most of the analyses…

However DØ and CDF have now accumulated about ~350 pb-1 of dataMost results will be updated within a few weeks

BSM theory

Vs. TopologyADD RS Z’ LQ TC EL EQ

ee/

ee

e Model Independent*

e/+jets

Jets+MET

Mono-Jet

Di-jets

+MET Run I

Model Independent Search : e

DØ search performed within 100 pb-1

Very clean signature worth a model independent inclusive search

Interpretation of the observed MET spectrum in terms of an excluded domain in acceptance times Cross section