# Presentation: 498316

## Beyond the Standard Model

- A Cornucopia of Imaginations
-      Higher mass bosons
- mass reach approaches 1 TeV
-      Leptoquarks
-      Compositeness  (Drell-Yan, Jets)
- sensitivity in  > 5 TeV region
- Strong Coupling, Technicolor
- SUSY ( The mainstream)
- Higgs (inc  SM)

**“****Run II”**
**Workshops **
**Experiments &**
**Theorists**

## Heavy Gauge Boson Mass Limits

## Leptoquarks: 1st Gen.

**CDF**

**D0**

## Leptoquarks: CDF 2nd Gen.

## Leptoquarks: D0 2nd Gen.

## Leptoquarks: 3rd Gen.

## LeptoQuark Mass Limits

## Search for Quark Substructure

- Preons interaction  scale as 
- Existence of substructure at energies below  indicated by presence of four-fermion contact interactions.

- Proton

- Quark

- Preons?

- M

- cos

**Notes:**
 t’Hooft: interactions at high energy leads to massless composite fermions via unbroken chiral symmetries of the preons and confinement by their strong precolour interactions.

## Compositeness

## Dijet Mass Spectrum

## Compositeness Limits: D0

************** ****TeV ****************4 TeV**

**Ratio of Dijet Cross Sections in Different Rapidity Ranges**

## Drell Yan: CDF

- Electrons
- & Muons

## Drell Yan: D0

- Electrons Only
- CC & EC

## Drell Yan Process

- D0 Limits

- CDF Limits

## Technicolor?

**A dynamical interaction which offers an alternative**
** ****explanation to electroweak symmetry breaking.**
**SM Higgs boson ********  technipions (states of two**
** ****techniquarks bound by the technicolor force)**
**********T**** ******** ****W************o****T****, ****Z****o************T****, ****W********Z****o****, ********o****T ************T****, ****ƒƒ’**** **

******o****T ******** *****bb****** *****and***** *************T***** ********* *****bc***

**CDF:**
**Exclusion region at**
**95% CL in the**
**M(********T****),M(********T****) plane**
**using lepton + 2jets**
**data sample**

## Technicolor

## Technicolor

## Technicolor

**D0 Analysis of Drell-Yan Data**

## Jet-Jet Searches

## Technicolor

## Technicolor Simulation

**Strong EW Symm. Breaking is possible**
**Cross sections are substantial**
****egT ==>  T  + W** **
**     ****finds two new particles**

******T**

******T**

## M Susy SM (mSUGRA)

## MSSM (mSUGRA)

## MSSM (mSUGRA)

## CDF EVENT

## SUSY with Photons 

****** ****ME****T**** analysis**
**GMSB and radiative decay models**
**CDF: m(*****C******1*****) > 120 GeV**
**observation of *****ee*********ME****T**** candidate, hard to explain from SM sources**
**DØ: m(*****C******1*****) > 150 GeV**
**larger detector acceptance gives stronger limit**
****** ****ME****T**** 2j analysis**
**radiative decay model, when only one *****N******2***** is produced**
**DØ: squark and gluino mass limits**
**m****gluino**** = m****squark**** > 311 GeV**
**for light gluino / heavy squarks:****m****gluino**** > 233 GeV**
**for light squarks / heavy gluino:****m****squark**** > 219 GeV**

## Rp

_**Limit Summary**_

## SUSY

## SUSY Futures

## Higgs at the Tevatron

## Higgs Branching Ratios

## Slide 32

## Higgs Searches

_**Search for the SM Higgs Boson**_

**associated production modes**
**Higgs + W/Z**
**search for *****H***** ******** *****bb***
**W ******** ************, *****qq***** and Z ******** ********, ******** **

****** ****provide the most**
**sensitive channels for**
**SM Higgs searches**
**at the Tevatron**

**Observations**
**consistent w/**
**SM background**
**expectations**

## Higgs Searches

_**Search for a Non-SM Bosonic Higgs Boson**_

**a ****light neutral scalar Higgs with suppressed**
**couplings to fermions**

**associated production mode**
**Higgs + W/Z**
**search for H ******** ******
**and W/Z ******** jets**

**(****a) SM Higgs******

**(****b) bosonic Higgs******

_**M(bosonic Higgs):**_
**DØ published:**
****** ****78.5 GeV (95******** CL)**
**CDF preliminary:**
** ******** ****82.0 GeV (95******** CL)**

##  Search for SUSY Higgs Bosons

**If (***m****H********* < *m****t*** - *m****b*****) then  *****t **********  Hb******  *****competes  with the  SM mode *****t **********  Wb******   *****where  *****H******+***** ********* ************ ******+************, cs, Wbb******.****** ***

**Exclusion contours assuming**
********(*****tt*****) = ****4.5****, ****5.0****, ****5.5***** *****pb**

**DØ indirect search:**
***tt***** disappearance**
**taking into account**
***H******+***** ********* ************ ******+************, cs, Wbb***
**search restricted to**
**0.3***** ************ *****tan ******** *********** *****150**

- _ __**Search for SUSY Higgs Bosons**_

**CDF search for neutral**
**SUSY Higgs bosons**
***bb***** + *****h/H/A***** ******** *****bbbb***
**plot of  tan ********** vs M****h****  ******

## Higgs at the Tevatron

## Higgs at the Tevatron

_**Topologies**_

**          ****Gluon-Gluon Fusion gg=> H**

**SM Higgs, M****H**** > 130 GeV**
**           ****Higgs Strahlung off W/Z Bosons**

## Slide 38

## Slide 39

## Higgs Sensitivities

**bbbar**

**ll**

## Standard Model Higgs

_**Standard Model Higgs**_

**  ****Revelation from November Run II Workshop****!**

## SUSY Higgs

## Conclusions

**The physics has been superb.**
**The Future Physics will be superb.**
**Tevatron currently operating for Fixed Target Physics**
**Run II**
**Tevatron Collider Commissioning early 2000**
**Detectors ready Summer-Fall 2000**
**“****Run IIb” **
**Run, Run, **
**“****30 fb^-1 and/or Higgs**