# Presentation: 195465

## Recent Tevatron Results

- Young-Kee Kim
- University of Chicago & Fermilab

- On behalf of Tevatron Accelerator Team and CDF / DØ Collaborations

- Entry to Tevatron Physics:
- _[http://www-d0.fnal.gov/Run2Physics/WWW/results.htm](http://www-d0.fnal.gov/Run2Physics/WWW/results.htm)_
- _[http://www-cdf.fnal.gov/physics/physics.html](http://www-cdf.fnal.gov/physics/physics.html)_

- Young-Kee Kim, U. Chicago / Fermilab

## Tevatron Luminosity

- Peak luminosity record: 1.8  1032  cm-2 s-1
- Integrated luminosity
- weekly record: 27 pb-1 / week / expt
- total delivered: 1.5 fb-1 / expt, total recorded: 1.3 fb-1 / expt
- Doubling time: 1 year
- Future: ~2 fb-1 by 2006, ~4 fb-1 by 2007, ~8 fb-1 by 2009

- 2002     2003     2004     2005

- 2002     2003     2004     2005

- Peak Luminosity                                Int. Lum. (delivered) / Experiment

- Include machine studies and diffractive program (low L)

- Young-Kee Kim, U. Chicago / Fermilab

## Tevatron Detectors

- CDF

- DØ

- Excellent Detectors - tracking, b-tagging, calorimeter, muon, ...
- CDF Strength: momentum resolution and particle ID(K,)
- DØ Strength: muon coverage and energy resolution

- Young-Kee Kim, U. Chicago / Fermilab

## SM Particles at the Tevatron

- with 1 fb-1
- 1.4 x 1014
- 1 x 1011
- 6 x 106
- 6 x 105
- 14,000
- 5,000
- 1000 ~ 100
- 100 ~ 10

**H**

- (barn)

- Young-Kee Kim, U. Chicago / Fermilab

## Tevatron Physics

- Beyond SM Searches (direct and indirect)
- Higgs
- Supersymmetry
- Large extradimensions
- New gauge bosons
- New fermions
- Signature-based searches
- .....
- and SM Precision measurements
- Fundamental parameters: MW, Mtop, ...
- Spectroscopy: X(3872) → J/ , B1, B2*, Bs2*, “pentaquarks”, ...
- Heavy flavor production, decays: B, Bc+, B, B→DD, , K, , ...,
- 	Bs, Bd mixing, CP violation: Acp(B→hh),Acp(D0→K), ASL, ...
- Parton distribution functions: u(x)/d(x), g(x), ...
- Benchmark cross sections: W,Z, tt, ...

- Test every aspect of SM
- towards the Unknown!

- Young-Kee Kim, U. Chicago / Fermilab

## OUTLINE

- Standard Model Productions, Decays, Lifetimes, ...
- via QCD: inclusive, charm, bottom, top pair
- via Electroweak: W, Z, , di-boson, Single top
- via Electroweak and QCD: boson+jets
- New Phenomena
- Through direct searches
- Through rare decays
- Bs - Bs Oscillation
- Origin of Mass
- SM Higgs Searches
- MW and Mtop Measurements

- Young-Kee Kim, U. Chicago / Fermilab

## Jet and b-jet Production

- Jet Cross Section                       b-jet Cross Section

- 8 orders of magnitude !!

- Young-Kee Kim, U. Chicago / Fermilab

## , W, Z Production

- 337 pb-1

- CDF PRD-RC 71, 051104 (2005)

- Young-Kee Kim, U. Chicago / Fermilab

## Top Pair Production

- CDF
- prelim.
- DØ
- prelim.

**CDF Preliminary**
**(760 pb****-1****)**

**Jet Multiplicity**

- lepton+jets:
- no b-tagging

- lepton+jets:
- b-tagging
- 3 or more jets

**DØ Preliminary (370 pb****-1****)**

- Better than 10% Measurement

- Young-Kee Kim, U. Chicago / Fermilab

## tt Resonance and Single Top and

- Expect 3 evidence with 2 fb-1

- -

- Young-Kee Kim, U. Chicago / Fermilab

## X(3872)  J/  ee, Bc Observation

- PRL 93, 072001 (2004)

- X(3872)  

- hep-ex/0512074

- X(3872)  ee

- Young-Kee Kim, U. Chicago / Fermilab

## Observation of Excited L=1 B Mesons

**B      B*********   B*********0****   B*********1****    B****1****     B*********2****    **

**B****s****    B*********s****   B*********s0****   B*********s1****   B****s1****   B*********s2****      **

**Mass [GeV/c****2****]                         Mass [GeV/c****2****]**

**Pred.: M. Di Pierro, E.Eichten: PRD 64:114004, 2001**

- CDF: M(B2*) = 5738 ± 5 ± 1 MeV
- DØ: M(B2*) - M(B1) = 25.2 ± 3.0 ± 1.0 MeV

- DØ: M(B*s2) = 5839.1 ± 1.4 ± 1.6 MeV

- DØ M(B1) = 5720.8 ± 2.5 ± 5.3 MeV
- CDF M(B1) = 5734 ± 3 ± 2 MeV

- Young-Kee Kim, U. Chicago / Fermilab

**Notes:**
CDF: two modes
B+ -> J/ K+, D0(K+-)+

## B Hadron Lifetimes

******b ******** J/******** ********0**

**B****s********K****+****K****-**

- (Bs0) = 1.53 ± 0.18 ± 0.02 ps
- (CP eigenstate)

**First observation!**

- Young-Kee Kim, U. Chicago / Fermilab

## CP Violation in Mixing

- Unique properties of DØ detector for muons:
-         measure asym. from detector effects by changing magnetic polarities

- Ciuchini *et al*. hep-ph/0308029

- CP Violation parameter Re(b) / (1 + |b|2) Units:10-3

**1 fb****-1**

- ASL: Asymmetry in the same sign lepton pairs (from bb-bar)
- ASL = (N++ - N--) / (N++ + N--) = 4Re(b) / (1 + |b|2)

- ACP (B0 **** K+-) = -0.04 ± 0.08 ± 0.01 (CDF Preliminary)

- Young-Kee Kim, U. Chicago / Fermilab

## Top: Charge, Lifetime, Br, W helicity

- DØ Prelim.
- 365 pb-1

- Top Charge               Top Lifetime

- top< 1.75x10-13s
- ctop< 52.5m
- at 95%CL

- Exclude Q = +4/3 at 94% CL

- Reconstructed Top Charge (e)                           Impact Parameter (m)

- bgrnd

- signal

- f+ = 0.04 ± 0.11± 0.06
- f+ (SM pred.) = 0

- signal+bgrnd

**370 pb****-1**

- CDF Prelim.
- 318 pb-1

- Young-Kee Kim, U. Chicago / Fermilab

## New Phenomena

- Many possible new particles and theories
-   Supersymmetry - many flavors
-   Extra Dimensions (G)
-   New Gauge groups (Z’, W’, ...)
-   New Fermions (e*, *, t’, b’, ...)
-   Signature-based
-   Leptoquarks
-   ....
- Through Direct Searches
- Through Indirect Searches - Precision Measurements and Rare Decays

- Young-Kee Kim, U. Chicago / Fermilab

## Supersymmetry: Charginos and Neutralinos

- Mixed states of W,Z,,H’s SUSY partners
- Electroweak precision data favor light SUSY
- J. Ellis, S. Heinemeyer, K. Olive, G. Weiglein (hep-ph/0411216)
- Many analyses to cover low and high tan

**Missing E****T**** (GeV)**

- Young-Kee Kim, U. Chicago / Fermilab

## SUSY: Squark, Gluino, Stop, Sbottom,...

**DØ Prelim**
**310 pb****-1**

**CDF Prelim**
**322 pb****-1**

- Young-Kee Kim, U. Chicago / Fermilab

## MSSM Neutral Higgs Searches

- Getting into a really interesting area!

- Young-Kee Kim, U. Chicago / Fermilab

## Extra Dimensions and New Gauge Bosons

- CDF Prelim. (448 pb-1)

- Mee [GeV/c2]

- DØ

- CDF Prelim. (368 pb-1)

- Eff Planck Scale MD [TeV]

- Jets + missing ET

- Young-Kee Kim, U. Chicago / Fermilab

## New Fermions: t*, q*, e*, *, ...

- Young-Kee Kim, U. Chicago / Fermilab

## Signature-Based Searches: ll + X

- DØ Prelim.
- 383 pb-1

- NLL0 → 

- X = no requirement,
-       e, , , , b, jet,...

- X = long lived object

- Young-Kee Kim, U. Chicago / Fermilab

## Signature-Based Searches:  + X

- X = missing ET
-     Gauge-Mediated SUSY

- X = 
- X = e,

- Young-Kee Kim, U. Chicago / Fermilab

## Bs - Bs Mixing

- Young-Kee Kim, U. Chicago / Fermilab

## Bs Signal Samples

- Bs Ds , where Ds, K*K, 3
- Bs Ds 3, where Ds, K*K

- ~1100 fully reconstructed Bs

- Bs Ds, where Ds, K*K

- ~34k semileptonic Bs

- DØ Prelim.
- (610 pb-1)

- CDF Preliminary
- (350 pb-1)

- Young-Kee Kim, U. Chicago / Fermilab

## Oscillation Amplitude Fit

- DØ Prelim. 610 pb-1
- Semileptonic

- CDF Prelim. 355 pb-1
- Hadronic and Semileptonic

- ms [ps-1]                                              ms [ps-1]

- Amplitude

- Sensitivity = 13.0 ps-1
- Exclusion: ms < 8.6 ps-1 @95%CL

- Sensitivity = 9.5 ps-1
- Exclusion: ms < 7.3 ps-1 @95%CL

- CDF:D2 - this result: semileptonic - 1.5%, hadronic - 1.5%
- 	     Just approved ~4% same-side K tag

- Fit A for each ms: A=1 for true ms

- New Tevatron results improved the world ms limit
- from 14.5 ps-1 to 16.6 ps-1 @ 95%CL

- Young-Kee Kim, U. Chicago / Fermilab

## Origin of Mass

- SM Higgs Searches
- W Boson Mass
- Top Quark Mass

- You should go to the masses,learn from them, and synthesize their experienceinto better, articulated principles and methods, ....						- Mao

- Young-Kee Kim, U. Chicago / Fermilab

## Standard Model Higgs Searches

- bb

- WW

- dominant Higgs decay modes

- Significant improvement expected
- Jet resolution
- Forward b-tagging
- Forward lepton

- Young-Kee Kim, U. Chicago / Fermilab

## 115 GeV Higgs is an interesting case!

| LEP | Saw a 2hint |
| --- | --- |
| Tevatron 2007
(2.5 fb-1 / expt) | 95% CL Limit |
| Tevatron 2009
(8 fb-1 / expt) | WH Wbb
ZH  Zbb
75% chance for 3 evidence
10% chance for 5 discovery |
| LHC | 
H  

ttH  ttbb

qqH  qq (forward qq jets)
 |

- LEP:
- Tevatron:
- LHC:

- Young-Kee Kim, U. Chicago / Fermilab

## New Mtop Results since Summer 2005

- Young-Kee Kim, U. Chicago / Fermilab

## Top Quark Mass

- Summer 2005

- Dilepton:
- CDF-II MtopME = 164.5 ± 5.5 GeV
- Lepton+Jets:
- CDF-II MtopTemp = 174.1 ± 2.8 GeV
-    CDF-II MtopME = 173.4 ± 2.9 GeV
- CDF Combined:
- MtopCDF = 172.0 ± 1.6 ± 2.2 GeV
-         = 172.0 ± 2.7 GeV

- New since Summer 2005

- Updated CDF + DØ combined result is coming!

- Young-Kee Kim, U. Chicago / Fermilab

## Mtop etc.

- Young-Kee Kim, U. Chicago / Fermilab

## Comments on Projections

- Run I Measured
- 110 pb-1

- Run II (2fb-1)
- Projections
- in 1996

- 318 pb-1

- 680 pb-1

- Run II
- Measured

- Run II (8fb-1)
- Projections
- In 2005

- Int. Lum [pb-1]

- CDF Top Mass Uncertainties

- Young-Kee Kim, U. Chicago / Fermilab

## Conclusions

- Tevatron Accelerator and DØ and CDF Experiments have been performing well.  Better than ever!
- Producing excellent results
- ~60 PRL/PRD submitted in 2005
- ~120 APS abstracts (mostly students) submitted in 2006
- Looking forward to Summer 2006 conferences
- 	with 1 fb-1 / experiment
- 1 fb-1 analysis just began - I showed you ~5 results.
- Results with x3 increase in statistics over Summer 05
- Report on > (20 ~ 30) x Run I sensitivity !!

- Young-Kee Kim, U. Chicago / Fermilab

## Conclusions

- The upcoming years will be an exciting time with increasing statistics
- Discovery through searches
- Discovery through precision measurements
- Tevaton Experience:
- With ~4 pb-1, Top limits set
- With ~20 pb-1, Evidence paper out!
- With ~65 pb-1, Discovery paper out!
- Hoping for new physics hints with ~1 fb-1
- New physics could appear with every factor of 3~4.

- Young-Kee Kim, U. Chicago / Fermilab

## END

- Young-Kee Kim, U. Chicago / Fermilab

## Projected Data Growth

- Young-Kee Kim, U. Chicago / Fermilab

## Supersymmetry: Charginos and Neutralinos

- Mixed states of W,Z,,H’s SUSY partners
- Electroweak precision data favor light SUSY
- J. Ellis, S. Heinemeyer, K. Olive, G. Weiglein (hep-ph/0411216)
- Many analyses to cover full phase space
- Low and high tan

- Young-Kee Kim, U. Chicago / Fermilab

## MSSM Charged Higgs Searches

- BR(tH+b) can be large, competing with the tW+b.
- Search based on the tt cross section: top disappearance in lepton channels

- Young-Kee Kim, U. Chicago / Fermilab

## Rare decays

- Searches via rare decays:
- Br(Bs  ) < 2 x 10-7

- Young-Kee Kim, U. Chicago / Fermilab

## B Hadron Lifetimes

- Young-Kee Kim, U. Chicago / Fermilab

**Notes:**
Lambda_b:
Single best measurement in a fully reconstructed decay mode
With the outstanding discrepancy between the lifetime measured with 
partially reconstructed decay modes and theory, the crucial
next step is to measure it with better precision in fully reconstructed decays.

## Leptoquarks

- Second Generation Scalar Leptoquarks

- Young-Kee Kim, U. Chicago / Fermilab

## Bs Oscillation: World Average

- New Tevatron results improved the world ms limit
- from 14.5 ps-1 to 16.6 ps-1 @ 95%CL

- Young-Kee Kim, U. Chicago / Fermilab

## Bs Mixing

-   CDF projections were made ~ 1year ago :  “current” = Spring 2005
-   By Fall 2005, CDF has surprised the baseline projection
-   Goal is to reach “stretched” by Summer 2006
-   At “stretched”, CDF will be probing SM region at 3-sigma level

- Young-Kee Kim, U. Chicago / Fermilab

## MW and Mtop Projections

- CDF Run II

- Young-Kee Kim, U. Chicago / Fermilab

## MW and Mtop at Tevatron / LHC / ILC

- Young-Kee Kim, U. Chicago / Fermilab