# Presentation: 498555

## Average B Lifetime 

- Inclusive B lifetime with J/’s
- cCDF = 458 ± 10stat.  ± 11syst. m (PDG: 469 ± 4 m)
- Exclusive B+ J/Klifetime
- cCDF = 446 ± 43stat. ± 13syst. m (PDG: 502 ± 5 m)

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## (Designed for B , H bb triggers)

-  Toward searches for new phenomena

- (Designed for B , H bb triggers)

**Silicon Secondary Vertex Trigger**

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## Heavy Mesons

- BJ/K                        BsJ/B+  D0 +                          B  h+ h-

- 	M(Bu  J/K+)           	= 5280.6 ± 1.7 ± 1.1  MeV 	(PDF=+0.9)
- 	M(Bd  J/K0*,K0*K+)	= 5279.8 ± 1.9 ± 1.4  MeV 	(PDF=+0.2)
- 	M(Bs  J/, K+K-)  	= 5360.3 ± 3.8 +2.1-2.9MeV 	(PDF=-2.1)
- M(Ds±,D±), D, K+K- 	= 99.28 ±0.43 ±0.27 MeV (PDF: 99.2±0.5MeV)

- # of B+ = 56±12

- # of B = 33±9

- # of B+ = 56±12

- Toward meas. (Bs J/Ks), Bs mixing (Bs Ds), meas. (B )
- Toward new phenomena

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## Searches for New Phenomena (D0)

- Gauge mediated SUSY
- +ETmiss) < 0.9pb
- First generation leptoquark

**Extra Dimensions**

- Extra dimensions
- Limits from ee,  final state
- MS(GRW) > 0.92 TeV

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## Searches for new phenomena (cont.)

- using particle ID capabilities: TOF

- Novel uses (beyond K tagging) in the works:
-  CHAMPS, charged massive particles, (large flight time)
-  SUSY: LSP M(10)  NLSP M(1±)
-  4th gen. particles
-  magnetic monopole trigger (large pulse height)

****K+K-

- S/N = 1:40

- S/N = 1:2.5

**CDF Run 2 Prelim.**

**TOF**

**CDF**

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## Tevatron Prospects (Timeline)

**LHC (pp) 14 TeV**

**LC (e****+****e****-****) 0.5-1 TeV**

**construction**

- + B factories,
-  programs

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## EWK Prospects (MW, Mtop)

- MWstat.  MWsyst. (largely stat.)
- Run IIa: MW  30 MeV/expt.
- MWworld  20 MeV

- MtopRun I = 5.1 GeV
- Mtopstat.  Mtopsyst. (largely stat.)
- IIa: Mtop 3GeV, IIb: Mtop2GeV

- Run IIa

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## EWK Prospects (sin2W)

- Forward-backward asymmetry of l+l-, AFB
- a test of SM /Z interference at l+l- well above LEP-II reach
- AFB (75 < Mll < 105 GeV) effective weak mixing angle sin2W
- at 10 fb-1, stat. : sin2W  0.00028
-      syst. : sin2W  0.0007 (PDFs, current knowledge)
- sin2Wworld (2001) = 0.00017

- Run II (10 fb-1)
- one expt. one channel

- d/dMee

-   Mee(GeV)                                  Mee(GeV)                                      Mee(GeV)

- AFB

- AFB

- CDF Run I

- D0

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## SM Prospects (Higgs)

**H ********bb**

**H ******** WW**

- Dominant decay mode

- (pb)

- Run IIa (~ 2 fb-1/expt): MH < 115 GeV limit
- Run IIb (~15 fb-1/expt): MH < 180 GeV limit or see signal

- MHiggs (GeV)

- Parameterized Simulation

- LEP
- Reach

**Run IIa**

**Run IIb**

- L(fb-1)

- 80      100      120      140      160      180

- 1

- 10

- 100

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## SM Prospects (Higgs)

**Tests top quark Yukawa coupling **

**Major background : t t-bar + jets**

- Higgs + tt: small cross section
- but low signal/background

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## Standard Model Prospects

**	**EW precision measurements
- 	  ((5)had(MZ2) = 10-4, MW = 20 MeV, mt = 1 GeV, AFB ~ 2 x 10-4)
- 	+ Higgs direct searches could lead to inconsistency.

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## SUSY Prospects (MSSM Higgs)

-  ~ 1 pb for tan = 30, Mh=130GeV

-   h/H/A can have SM-like x-sections
- 			at small tan 
-   bb + h/H/A enhanced at large tan 

**tan**** ******** ****= 40**

- 2fb-1: at tan=40
-    MA < 145 GeV exclusion
-          < 125 GeV 5 discovery

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## SUSY Prospects

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## Other Searches

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## Conclusions

- Tevatron Run II has begun!
- 	Some measurements are already competitive.
- High potential for discovery at Tevatron
- Tevatron, built to discover W’s and Z’s, ended up discovering Top quarks (Mtop MW + MZ).
- Tevatron Run I produced unexpected and rich B physics program. Also accuracy of MW, Mtop.
- LEP produced measurements and new particle searches much beyond expectation.
- We do know more about what to expect in Run II.  **BUT** new and unexpected results follow well-run experiments!

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