# Presentation: 318160

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

- Marumi Kado
- LAL-Orsay

## Synopsis, Selected Topics

| BSM theory
Vs. Topology | ADD | 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 Resonances

- DiLepton 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...

*...**D**Ø 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

- ll Interpretation in terms of Z’ and Little Higgs Searches

|  | channel | L (pb-1) | ZI | Z | Z | Z |
| --- | --- | --- | --- | --- | --- | --- |
| CDF | ee |  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 Model
*CDF 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

## ll and  Interpretation in terms of RS Resonance

- 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*

- 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/c**2** (k/M**Pl**=0.3)*

*Excluding exotic particle masses (axigluon, Excited Quark, color octet Technirho) between ~280 and 410 GeV/c**2** *

*Axigluon reach up to 1,1 TeV/c**2** *

## 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 

- 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 :

- Limits given in the GRW model where :

## Search for Excited Leptons Radiative Decays : the eeTopology

- New Particles Decaying to known Ones

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

*Contact interaction*

*Gauge boson mediated*

*For M**e*** = ***

*~3 bkg. events expected and 3 events observed*

- Two signal production models considered :

*For M**e*** = ****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    (e****jj)*
*	**- Two Jets and MET**	**	**    (****jj)*

## Searches for First Generation LeptoQuarks

- DØ performed a combined search for first generation LQs in both the eejj and ejj 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 E**T** is required*

- ejj selection : *One isolated electron, two jets and MET (isolated from the lepton), high M**T**e**** and a large total E**T** *

*~0.4 bkg. events expected and 0 events observed*

*~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 ****P**T**m** vs. ****E**T**j*

*~3.1 bkg. events expected and 2 events observed*

## 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*

## Search for Particles Undetected in Topologies with MET

- Jets+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 E**T** 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

## Conclusion

- DØ 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 data
- Most results will be updated within a few weeks

| BSM theory
Vs. Topology | ADD | 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