# Presentation: 413856

## Summary and Highlights of the Conference

**John Womersley**
**Fermi National Accelerator Laboratory, Batavia, Illinois**
- http://www-d0.fnal.gov/~womersle/womersle.html

## First of all . . .

**I would like to thank**
**The scientific committee**
**The conference organizers**
**The University of Karlsruhe and the Institute for Experimental Nuclear Physics**
**All of the speakers**
**The conference secretariat**
**	****for making this an extremely well organized and uniformly high-quality meeting **
**Thanks also to all those speakers who sent me material for this talk **
**Please don’t be offended if I chose to paraphrase it rather than using verbatim**

**Donald Duck**

- Throughout this talk, speakers’ names are shown like this:

## Outline

**Outline**

**My task:  summarize and highlight 27 hours of presentations in one hour**
**Requires that we travel at 0.9993c to achieve a sufficient time dilation**
**Things will be a bit of a blur!**
**Route of this talk:**

**Board here**

**Our Tools**
**   **
**        ****Our Physics**
**                ****Our Future**

## Our Tools

**Accelerators, detectors, computing**
**Theoretical and simulation tools**
**Knowledge of the structure of the proton**
**Analysis techniques**

## Tevatron

**Not out of the woods yet, but gratifying progress recently:**

- 4.8 pb-1/week

- 3.011031 on 9/24

**Now operating at least as well as Run I peak performance**
**Injectors are providing the necessary beams for L****0**** = 6 x 10****31**** cm****-2****s****-1**
**Much effort already spent to achieve current level of performance **
**Tevatron major issues are**
**Injection aperture and lifetime, Beam-beam effects, and instabilities**
**Identification and mitigation of luminosity impediments continues**

**Elvin Harms**

## Status of DØ

**The detector is working well and recording physics data:**
**Currently emphasizing operational efficiency**
**Improvements still in store**
**Trigger capabilities and L1 rate**
**Silicon vertex trigger under construction**

**Tracking****	****	****	****Calorimeter****	****	****      Muon**

**Volker B****ü****scher**

## Frank Chlebana

**Frank Chlebana**

## HERA

**Accelerator substantially upgraded since the last physics run in 2000**
**Two new IR’s **
** ****~500m of “new accelerator” , 58 new magnets**
**Goals: increase luminosity by ~4**
**Deliver ~ 1fb****-1**** to experiments by 2006**
**Add spin rotators**
**longitudinally polarized e****±**** beams**
**Now commissioning: painful process**
**Serious background problems**
**Synchrotron radiation (must improve shielding)**
**Beam-gas interactions (need better vacuum)**
**Detector upgrades**
**Luminosity counters, tracking, triggering**
**Physics goals**
**Proton structure, QCD, searches**

**Carsten Niebuhr**

## LHC

**Challenges: complexity and scale**
**Detector challenges**
**Tracker: occupancy, radiation**
**Muon system: high momentum muons require huge detectors**
**Calorimeter: H ******** ******** requires excellent EM resolution**
**Trigger, data processing**
**Management, logistical, assembly**
**Accelerator**
**Scheduled start is 2007**
**Dipole production is the critical path; still early in the process**
**40 out of 2000 dipoles expected by end of 2002**
**CERN financial situation . . .**

**Gigi Rolandi**

## Luminosity

**Requires counting the rate of a reference process with known ******
**Traditionally have used total inelastic cross section**
**Allows real time, instantaneous, bunch-****by-bunch measurements**
**Disadvantage:**
**What cross section to use?  CDF ******** D****Ø**
**What error?**

**D****Ø**** Scintillator counters**

**We will resolve this problem for Run II**

**Sergei Klimenko**

******L**** ~ 3-5%**

## Luminosity from W/Z

**Use W/Z production as reference process**
**Better known, calculable process**
**But acceptance needs to be modelled, and the calculated cross section depends on PDF’s**
**Important to understand errors due to the latter**
**Feasibility demonstrated using D****Ø Run I data, but not ****used by the experiments (yet)**
**ATLAS and CMS goals ~ 2%**
**“****Covering all the bases”**
**Dedicated small angle detectors (TOTEM for CMS, Roman pots in ATLAS)**
**special running at detuned ********* to measure reference processes**
**Forward detectors for real-time monitoring**
**Physics processes**

**Michael Dittmar**

**Walter Giele**

******L****  ~ 3-5% ******** 1%?**

**Luminosity at LHC**

**Michael Rijssenbeek**

**CDF and D****Ø will do this for real in**** Run II**

## Computing Infrastructure

**“****Something like” the GRID is becoming real:**
**SAM data access and distribution now being used by CDF and D****Ø**
**push towards offsite analysis of Run II data**

**Matthias Kasemann**

## Event Generators

**Matrix Elements and Parton Showers**
**Double counting problem**
**Correct PS by ME**
**Matching ME and PS****—****various efforts**
**Merging NLO ME with PS:  **_**MC@NLO**_** (Frixione and Webber)**
**Herwig++ is coming**
**Uses common class library with Pythia7 **
**(but not common physics functions)**
**Very tentative schedule**
**End 2002: beta version for LEP-I events with Fortran functionality**
**2003: first release, with improved shower, decays**
**2004: version for LHC**

**Stefan Gieseke**

- Dear Microsoft, this is not a hyperlink...

## Underlying event

**We should strive to improve the modelling of the underlying event in hadronic collisions**
**Important uncertainty on jet energy scale**
**Data from CDF:**
**Should include multiple parton scattering -- just a hard underlying event**
**what fraction of the Wbb cross section is W + bb from different parton-parton processes?**

**Mario Martinez**

## Proton Structure

**Our current knowledge of parton distributions is dominated by DIS at HERA:**
**Few % precision on structure functions**
**Cover 6 orders of magnitude in x and Q****2**
******, Z, and W****±**** exchange**
**With HERA upgrade, will exploit higher luminosity, polarization, more e****-**** data**
_**Note**_**:****Now using Tevatron jet data to constrain gluons (CTEQ6/MRST2001)**

**Henning ****Schnurbusch**

## Fits to Parton Distributions

**Fits to Parton Distributions**

**Can fit all the data with NLO theory + reasonably consistent PDF’s**
******2**** ~ 1.1 per DOF**
**Much recent effort to understand uncertainties on these distributions**
**Variety of approaches**
**How to handle systematic errors**
**Uncertainties 1-5 % except in odd regions (g, d at high x)**
**Find uncertainties from changing assumptions, ********S****, cuts,  etc. is significant (****» exp. errors)**
**Points to inadequacy of theoretical predictions?**
**Higher order terms**
**Low x/high x resummation**
**Low Q****2****/higher twist**

**“****Do not believe any one ****group’s errors!”**

**Robert Thorne**

- Back to using many PDF’s to cover the range of uncertainty?

## Towards NNLO QCD predictions

**NNLO is required for theoretical predictions to challenge high statistics results from LEP, HERA, Tevatron, (LHC...)**
**The bottleneck has been the calculation of the ****two-loop box graphs:**
**Critical component for NNLO jet cross sections**
**Technical breakthroughs, great progress in last two years: many 2********2 processes with up to one off-shell leg are now calculated at two-loops**
**Must combine with tree level 2********4, one loop 2********3 and self interference of the one loop 2********2 to obtain physical cross sections**
**Still some way off, but lots of ideas, lots of people working**
**	****Expect the first NNLO parton level Monte Carlos in the next couple of years, including********pp ******** jet + X**
**Also: LO parton-level simulations for up to 8 partons in the final state now available ****(e.g. QCD backgrounds to ttH)**

**Nigel Glover**

**Thomas Gehrmann**

## Vector boson + jets production

**Background to top, Higgs, SUSY . . .**
**Laboratory for QCD studies with “unbiased jets”**
**Theoretical calculations**
**LO: W/Z + any number of jets, 2002 (alpgen + others)**
**NLO: W/Z + 2 jets at NLO, 2002 (mcfm)**
** ****real need for an n> 2 jets NLO parton level generator!**
**NNLO: W/Z + 1 jet parton level generator, 200x?**
**Phenomenology**
**Cross sections reasonably stable at NLO**
**Good agreement between data and NLO theory for 0, 1jets**
- And between data and LO for up to 4 jets w/ scale tuning
**Vector boson p****T**
**Non perturbative parameters at low p****T**
**Extract from data, assuming same (******** m****W****/m****Z****) for W and Z**

**Walter Giele**

## Tau triggers and analysis 

**Tau triggers and analysis **

**John Smith**

## Our Physics

**I will mainly try to highlight Run II or other new results **

## Goals of Hadron Collider Physics

**Scott Willenbrock outlined five ways for hadron colliders to confront the SM**
**1. Precision electroweak **
**2. CKM **
**3. Top quark **
**test its properties**
**4. Higgs**
**As many processes and decays as possible**
**5. QCD **
**To which I will add**
**6. Directly search for new phenomena not part of the SM**

## QCD

**resolve some oustanding puzzles**
**understand the backgrounds to new physics**

## Jet Production at CDF

**Mario****Martinez**

- Run I

- ETraw = 403, 322 GeV

- IIa
- IIb

- 400

**Expected central jet yield**

- 600 GeV

**Run II jets in central ****and forward regions**

## Jet production at DØ 

**Central jets,  ~ 1.9****± 0.2 pb****-1**** at ********s = 1.96 TeV**
**Not yet fully corrected **
**Preliminary correction for jet energy scale****(but no unsmearing or resolution effects) **
**30-50% systematic error in cross-section**
**No trigger selection efficiency corrections**

- _Highest E__T__ Run II 3-jet event _ET : 310, 240, 110 GeV, Etmiss : 8 GeV

- Only statistical errors

**Inclusive Run II jet p****T**** spectrum**

**Elizabeth Gallas**

- Run II

**Another issue provoking discussion:**
**choice of Jet Algorithm for Run II**
**and why k****T**** ******** cone**

**Sergei Chekanov**

## Jet physics at HERA

**Jet physics at HERA**

**Oscar Gonzalez**

## Heavy flavour production at CDF

**Lots of unanswered questions from Run I**
**B production cross section****	****	****Charmonium cross section**

**Mary ****Bishai**

- Can be made to fit with resummationplus retuned fragmentation

- But polarization...

## Slide 27

## Heavy Flavour Production at DØ 

**μ****+jet cross-section**

**b-jet cross-section**

**results from ~ 5 pb****-1**

**Daniela Bauer**

**J/****ψ cross section**

** ****polarization**
**(test production mechanism)**

## Heavy quark production at HERA

**Heavy quark production at HERA**

**Andreas Meyer**

**2002: many new results**
**Almost all lie significantly above NLO theory, though ZEUS DIS at large Q****2**** is OK**
_**Charmonium**_
**No hard evidence for (or against) colour octet contribution to J/******

## B-production excess may be due to incomplete treatment of heavy quark fragmentation
Depends on how extracted and parameterized
Suggestion that updated Tevatron measurements needed

NLO appears insufficient
need for NNLO calculation of both charmonium and b-production

Suggestion to test charmonium production mechanism using V + charmonium (V=/W/Z, charmonium=J/ or c)

**B-production excess may be due to incomplete treatment of heavy quark fragmentation**
**Depends on how extracted and parameterized**
**Suggestion that updated Tevatron measurements needed**
**NLO appears insufficient**
**need for NNLO calculation of both charmonium and b-production**
**Suggestion to test charmonium production mechanism using ****V + charmonium (V=********/W/Z, charmonium=J/******** or ********c****)**

**Thomas Gehrmann**

**Bernd Kniehl**

**Cesar Palisok**

## Direct Photons

**Photon results from Hadron collisions are quite consistent with NLO QCD at high p****T**
**But CDF/DØ/E706 data indicate  possible ****excess over NLO QCD**** in the low p****T**** region. **
**One explanation proposed is that the  partons have a significantly higher  k****T**** (due to initial state soft gluon   radiation)**
**Can model with Gaussian smearing, but resummation offers hope for a more predictive calculation **
**Fragmentation contribution from LEP data**

**Sung-Won Lee**

**ZEUS results may indicate ****need to **
**review the present modelling ****of the **
**partonic structure of the photon****.  **

## QCD at the 1 GeV scale

**Low-x DIS at HERA**
**DGLAP evolution of F****2**** works down to about 2 GeV****2**
**LO DGLAP + resolved photon describes the data well**
**Below 2 GeV****2****, a variety of models:  Regge, color dipoles . . .**
**No sign in the data of BFKL or saturation effects in F****2**
**Comparison of BFKL to ZEUS data on high-t vector meson production**
**LO BFKL works remarkably well**
**Two-gluon exchange fails**
**Fermilab E735 **
**particle production at p****T**** ~ 1 GeV in********pp collisions at 1.8 TeV**
**parton rescattering included**
**source region size and pion density calculated**
**Energy density = 1.1 GeV/fm****3    **** too many degrees of freedom for a pion gas ... onset of q/g deconfinement?**

**Olaf Behnke**

**Laszlo Gutay**

-  first time I     have seen
-     data that     prefer BFKL

**Jeff Forshaw**

## Large anisotropic flow, consistent with hydrodynamical picture
Saturation of v2 (elliptic flow) at high pT

Suppression of back-to-back jets
 Surface emission? 

**Saturation of v****2**** (elliptic flow) at high p****T**
**Suppression of back-to-back jets**
** ****Surface emission? **

**Recent Results from STAR ****130/200 GeVA Au-Au collisions**

**130 GeV**

**Markus**
**Oldenburg**

**Jet quenching**?

## Diffraction

**Four presentations**
**Seemed simultaneously too much and too little?**
**Maybe it’s just me, but I found it hard to grasp a very coherent picture **
**Even though factorization (apparent partonic structure of a pomeron) is not guaranteed to work at********pp, ****Pomeron parton densities from HERA tend to work well at the Tevatron in conjunction with a 10% gap survival factor**
**The parton distribution is ~ 80% gluon **
- _Just a thought:_
- Can we relate somehow
**Production of J/******** where a single ****gluon becomes a color-singlet**
- 	and
**Hard diffraction where a color singlet ****behaves like a single gluon **

**Jeff Forshaw**

**Aharon Levy**

**Dino Goulianos**

## DØ showed diffractive W signal (CDF have reported similar signal earlier)

If a rapidity gap really implies diffraction, how can it be that we can kick a parton out of a proton with Q2 = mW2 and not destroy the proton in the process?
And do this 10% of the time? (1% rate, 10% survival probability)
What does this tell us about the colour content of the proton?
How do we relate gaps to the “normal” underlying event? 
Is a rapidity gap an underlying event as particle/energy flow  0?
Or one possible colour configuration? (or is that the same thing?)

**D****Ø showed diffractive W signal (CDF have reported similar signal earlier)**
**If a rapidity gap really implies diffraction, how can it be that we can kick a parton out of a proton with Q****2**** = m****W****2**** and not destroy the proton in the process?**
**And do this 10% of the time?**** ***(1% rate, 10% survival probability)*
**What does this tell us about the colour content of the proton?**
**How do we relate gaps to the “normal” underlying event? **
**Is a rapidity gap an underlying event as particle/energy flow ******** 0?**
**Or one possible colour configuration? (or is that the same thing?)**

**Diffractive W production**

**Silvia Tendindo-Repond**

## Run II

**Measure the gap survival probability**
**Relate rapidity gaps to diffractive (anti-)protons seen in Roman Pots**
**Measure********pp ********p ****(gap)**** jj ****(gap)**** p**
**Will provide a sanity check on Higgs production at the LHC **

**Khoze, Martin & Ryskin predict S/B > 1 for ****m****H**** = 115 GeV **includes gap survival factor 1/50
**BUT other authors say it’s impossible**(e.g. Schlein)
**Published cross section estimates cover 3 orders of magnitude**

**Both CDF and D****Ø are improving****their diffractive instrumentation****for Run II**
_**CDF**_**:  calorimeters and shower ****counters to cover 3.5 < ******** < 7.5**
_**DØ:**_** Roman pots in ******** z direction**

_**A modest list of projects**_

## CKM Physics

**Confront the unitarity triangle through (e.g.) B****0****S**** mixing . . .**

## B-physics at Hadron Colliders

**CP violation established in the B system through B****d**** ******** J/******** K****S**
**sin********d**** = 0.734 ****± 0.054 **
**Either ********d**** = 47 ******** (2******** in SM) or 133******** (new physics)**
**BaBar and BELLE can do much more with their data e.g.**
**Is B ******** ********K consistent with SM ******** < 90****°?**
**Same mixing asymmetry in B****d**** ******** J/******** K****S ****and B****d**** ******** ******** K****S ****?**
**B****d**** ******** ******** ******** will be an important piece of the puzzle**
**Hadron colliders (Tevatron and LHC) will in addition, provide access to the B****S**** system (“the El Dorado”)**
**Mixing parameters ********m, ******** **
**Sizeable CP violation in B****S**** ******** J/******** ********?**
**B****S**** ******** KK complements B****d**** ******** ******** ********; ******** extract ******
**B****S**** ******** D****S****K: extract ********S**** + ******** ******** ******
**Fully exploit all of these in the LHC era**
**Many other interesting topics e.g.**
**Rare decays e.g. B ******** K*********+********-****, B****s,d**** ******** ********+********-**
**Relation of CP in B-system to K ******** ******

**Robert**
**Fleischer**

**Marcel Merk**

## B-physics at CDF in Run II

**Build on Run I experience + new capabilities (SVT, TOF)**
**Leptonic signals**
**First purely hadronic signals  (using SVT)**

**Sandro ****de Cecco**

**Hugely impressive results; impossible for me to do justice to them here!**

## B Physics at DØ in Run II

******(B) = 492**** ****± ****37 ********m**** **

**D****Ø’s First B mesons**

**J/******** ******** ********+********-**

**	****D****Ø does not exploit purely hadronic triggers, but benefits from large muon acceptance, forward tracking coverage, and can use J****/******** ******** e****+****e****-**

**Wendy Taylor**

**Putting the tools in place**

## B-physics program at the Tevatron

**B****0****S**** mixing **
**New constraint on the unitarity triangle**
**CDF sensitivity **
**~ SM level with few hundred pb****-1**
**X****s**** ~ 70 with 2 fb****-1**
**CP asymmetry in J/********K****S**** = sin(2********) in SM**
**CP asymmetries in hadronic modes**
**measure lifetimes for B****+****, B****s**** and ********0****b****, and more . . .**
**Extract ********  from B****S**** ******** D****S****K**
**Rare decays**
**And, as a bonus, look forward to the ****world’s largest charm meson sample****in CDF**

## Electroweak

**Indirectly constrain new physics**
**m****W****, m****t**

## W and Z bosons at DØ

**Andrew Alton**

-  · B (W  e)  = 2.67  0.06 (stat)  0.33 (sys)  0.27 (lum)  nb
-  · B (Z  ee)  = 266  20 (stat)  20 (sys)  27 (lum)  pb
- Re = 10.0  0.8 (stat)  1.3 (sys)
- W = 2.26  0.18 (stat)  0.29 (sys)  0.04 (theory) GeV

- DØ Run II Preliminary

## W and Z bosons at CDF

-  · B (W  e)  = 2.60  0.03 (stat)  0.13 (sys)  0.26 (lum)  nb
-  · B (W  )  = 2.70  0.04 (stat)  0.19 (sys)  0.27 (lum)  nb
- R = 13.66  1.94 (stat)  1.16 (sys)

- CDF Run II Preliminary

**Eric James**

## Run II electroweak measurements

**Run II electroweak measurements**

**Forward-Backward asymmetry**

**W and Z cross sections at new ********s**

*1.96 TeV*

## Prospects for the LHC

**Will be possible to exploit the huge statistics of W and top production at the LHC to further improve precision on electroweak measurements**
**If needed...**

**Dominique Pallin**

## The Top Quark

**Measure its properties with greatly increased statistics**

## The Top Quark

**Top provides insight into electroweak symmetry breaking**

**BSM theories predict unusual top properties and states visible at Run II & LHC, such as Z’ (below) or top-higgs with FC decays.**

**Constrain the Higgs mass:**

**Elizabeth Simmons**

**X ********tt**

**X ******** t+jet**

## The Top Quark at DØ

**Exclude a narrow, leptophobic X boson with  m****X ****< 560 GeV/c****2**

**W******** e******** + jets scaling in Run IIa data: a school figure on the way to re-discovering top**

****** ****1 event**

**W(******** e********) + jets**

****** ****3 events**

**Ken Johns**

**New search for X ********tt in Run I**

## New Top Mass from Run I data

**New Top Mass from Run I data**

**m****t****= 179.9 ******** 3.6 (stat) ******** 6.0 (sys) GeV  ***preliminary*** **
**  ****New technique makes use of more information per event**
**  ****Better discrimination between signal and background**
**  ****Improves statistical error from 5.6 GeV [****PRD 58 52001, (1998)****] to 3.6 GeV: **
**    ****equivalent to ****a factor of 2.4 in the number of events****  **
**  ****22 events pass final cuts (from fit: 12 S + 10 B)**

*D**Ø Preliminary*

*D**Ø Preliminary*

**Juan Estrada**

- 68%
- C.L.

## Wolfgang Wagner

**Wolfgang Wagner**

## The Higgs Boson

**Discover (or exclude)**
**Constrain its properties**

## The Higgs boson at the Tevatron

**Remember, this assumes **
**Two experiments (OK)**
**Resolutions at least as good as Run 1**
**Good b-jet and lepton identification**
**Trigger efficient at high luminosities**
**Good understanding of all the backgrounds**
**Silicon, trigger and DAQ upgrades for CDF and D****Ø (2005) are moving towards approval**

**What the experiments ****are working on **

**Suyong Choi**

**Pasha Murat**

## Just for fun

|  | Plot | Number of showings |
| --- | --- | --- |
| Tevatron Higgs reach
 |  | 
8 |
| Tevatron B-cross section |  | 
6 |
| LHC Higgs sensitivity |  | 
5 |
| LHC SUSY Higgs mA, tan  |  | 
3 |

## Theoretical Progress on Higgs Production

**	****Greatly improved predictions both for signals and for backgrounds**
**Background calculations at NLO**
**MCFM, DIPHOX**
**Weak-boson fusion process at LHC**
**Higgs discovery and coupling ****measurements**
**access bb, ******** decays**
**ttH **
**ttH Yukawa coupling**
**NLO complete**
**Tevatron –20%, LHC +20%**
**gg ******** H **
**NNLO complete**
**p****T****, y distributions to NLO**

**Robert Harlander**

- gg  H

- pp ttH
- NLO scale dependence

- NNLO

**Bruce Mellado**

## Searches

**Find phenomena outside the SM**

## Searches at the Tevatron

**In Run I, CDF and D****Ø carried out extensive searches for SUSY **
**Squarks/gluinos ******** Missing E****T**** + jets ****(+ lepton(s))**
**Charginos/neutralinos ******** multileptons**
**GMSB ******** Missing E****T**** + photon(s)**
**Stop, sbottom**
**RPV signatures**
**Searches for other new phenomena **
**leptoquarks, dijet resonances, W’,Z’, massive stable particles, extra dimensions . . .**
**No sign of new physics **

**Hyunsoo Kim**

- Note: CDF report possible disagreement between observed and expected number of l+MET events.    HCP2004?

## SUSY searches in Run II

- Missing Transverse Energy

*D**Ø Run 2 Preliminary*

- 

- QCD+DY

******+E****T****miss**

**Run II limits are not yet competitive, but show ****we are ready for this physics**

**E****T****miss ****in jet events**

**Trilepton candidate**

- Hardware!

- Missing Transverse Energy

**First Run II SUSY limit**** **
**Gauge mediated SUSY********pp ******** ********+E****T****miss****Cross section for ********+E****T****miss**** > 0.9pb**

**Andrei Nomerotski**

## Supersymmetry at the LHC

**5******** discovery reach in inclusive mSUGRA search**
**Squarks/gluinos probed to ~1.5 TeV with 1 fb****-1**** **
**Up to 2.5 TeV at design luminosity (100 fb****-1****)**
**Exclusive mass reconstruction demonstrated for several benchmark points**

**Darin Acosta**

**CMS**

**q, g Reach in Jets+ME****T**** vs. *****L***

**~**

**~**

## Other new phenomena in Run II

**	****First generation leptoquark****Run II mass limit**
**	****M****LQ**** > 113 GeV ****for B(LQ ******** ej) = 1**

**	****Run II limits from********pp ******** ee,********, ******** **
**	****M****S****(GRW) > 0.92 TeV (ee/********)**
**	****M****S****(GRW) > 0.50 TeV (********) **
**	****	****(first limit from a hadron collider ****	****in this channel)**

**LQ ******** ej**

**Andrei Nomerotski**

## Other new phenomena at LHC

**Other new phenomena at LHC**

**	****Combination of 100 fb****-1**** and 14 TeV gives potential to observe ****almost any new physics associated with the TeV scale**
**Not a theorem, but “proof by enumeration”**
**Extra dimensions and TeV scale gravity**
**Effects can be indirect (virtual gravitons) or direct and spectacular (black hole production!)**
**Compositeness (up to 20-40 TeV)**
**Excited quarks**
**Technicolor**
**Strong WW scattering**
**Leptoquarks**
**New gauge bosons**
**Heavy RH neutrinos**
**. . .**

**Pamela Chumney**

## Searches at HERA

**“****There does exist possibly exciting new physics which could lead to acceptable and striking signals at HERA”**
**e.g. RPV SUSY stop******** sbottom +W**
**FCNC in top sector (single top production)**
**Doubly charged higgs (dilepton signatures)**
**Extra dimensions**
**Compositeness, leptoquarks, lepton flavour violation...**
**Exhaustive searches done at HERA-I**
**HERA-II benefits from**
**Increased luminosity + perhaps ********s**
**Polarization to disentangle any eventual signal**
**Complements searches that will be carried out at the Tevatron on the same timescale**

**Yves Sirois**

## Isolated leptons at HERA

**Compatibility with “new physics” explanation?**

**look forward to HERA-II**

**Isolated leptons at HERA**

**Elisabetta **
**Gallo**

**Also: excess of 3eee and 3ee events w/ m****12**** > 100 GeV in H1;  not seen in ZEUS**

## Our future

## Wandering in the wilderness . . .

**Whichever side of the Atlantic we are on, hadron collider physics seems to be beset by problems**
** ****technical, financial, management, schedule, politics . . .  **
**Important to remember that the physics remains the best in the world**
**Clear from this meeting that we also have a vibrant, enthusiastic community of young physicists**
**Keep the faith!**

## Why we fight . . .

**Seven anomalies that point to physics beyond the SM**
**Massive ******** **
**new scale ****» 246 GeV**
**Gravity**
**astrophysics/cosmology **
**dark matter, dark E, baryon asym., inflation**
**precision EW fits poor**
**Why mass spectrum? Why mixing angles small (q)/large(********)**
**Unification **
**Why is charge of electron = charge of proton?**
**Hierarchy problems**
**why 246 GeV?**
**The Higgs is central to all of these**
**the key question for the SM**
**Window to beyond-the-SM physics**

**Scott**
**Willenbrock**

## Short term prospects

**By next summer (LP2003 at Fermilab), we expect physics results from Run II with a few hundred pb****-1 **** **
**significantly increased sample over Run I with improved detectors and a higher center of mass energy**
**B****s**** mixing**
**Top quark measurements with increased statistics and purity**
**Jet cross section at high E****T**** (constrain gluon PDF)**
**New limits on physics beyond the SM **
- e.g. MSSM A/H at large tan 
**. . . **

## Prospects for Run II

**?**

- SUSY
- Mhmax ~ 130 GeV
- 

- Grünewald, Heintz, Narain, Schmitt, hep-ph/0111217
- Assumes current central values
- (5)had(MZ2) = 10-4, MW = 20 MeV, mt = 1 GeV

## Sally Dawson

**Sally Dawson**

## See you in 2004

**I wish everyone a safe trip home**
**I myself will be riding steam trains tomorrow:**