Recent Results from the TevatronBeate HeinemannUniversity of California at Berkeley and Lawrence Berkeley National LaboratoryLCWS Workshop, DESY, May 2007_s=1.96 TeV

Luminosity and Cross Sections

~100?At peak luminosity ~1 W boson per second produced!Run 2: Ldt = 2.8 fb-1Experiments are ~85% efficient:2.2 fb-1 for physics analysesMost analyses use 1.3 fb-1 with 1 fb-1

1.4 x 1014

1 x 1011

6 x 106

6 x 105

14,0005,000

The Standard Model and the Standard Questions We HaveIs QCD the right theory for the strong force?Are the calculations adequate?What is the origin of electroweak symmetry breaking?Is there a Higgs boson?Is the CKM matrix the only source of CP violation?What is the Dark Matter?Is it produced it at colliders? Are there new dimensions of space? Or e.g. extended gauge sectors, more gauge bosons,?

Is there anything maybe that no one has thought of and no one has looked for and we missed it?

OutlineTesting Particle ProductionJets, Ws and Zs, b-jets, top quarksElectroweak Symmetry BreakingW boson mass and widthTop quark massHiggs boson searchBeyond the Standard ModelSupersymmetry and beyondFlavor physics:B lifetimes, mixing and Rare Decays

Production of Particles

Jet Cross SectionsCross section measured over 7 orders of magnitudeData well described by Standard Model prediction up to masses of 1.2 TeV

W and Z productionHigh precision measurements test NNLO QCD predictions

W/Z + Jets ProductionW + n jetsZ + n jets

B-quark ProductionMeasurements of b-jet production in good agreement with theoretical predictions

Z+b+bb+X

Top Quark Production Measurements consistent with theory1 b-jet2 b-jets

Top Quark: Kinematics+PropertiesKinematic properties, couplings and charge consistent with Standard Model top prodiction so farqtop=+2/3?

Single Top ProductionRecently D announced first evidence for single top productionstill rather poor precision and further data needed to clarify situationFrom D result:Vtb>0.68 @ 95% CL Vtb2

Diboson ProductionDiboson production probes trilinear couplings among the gauge bosons (TGC)Direct prediction from SU(2)xU(1) gauge groupNew physics could lead to anomalous couplingsWW, W, Z observed some time ago:Agree with SM predictionFocus today:WZ cross section: SM=3.7 0.3 pbZZ cross section: SM=2.1 0.2 pbTGC

Diboson Production: WZ,ZZWZ:5.9 observationCross section: 5.0+1.8-1.6 pbZZ:3.0 evidencellll mode: 2.2ll mode: 1.9ZZllWZlllZZllllCDFD

Diboson Production SummaryHiggs Boson is next in line

Electroweak Symmetry Breaking

Precision measurements of muon decay constant and Z boson properties (LEP,SLD)W boson mass (LEP+Tevatron)Top quark mass (Tevatron)

The Electroweak Precision Data

Lepton Energy Scale and ResolutionSystematic uncertainty on momentum scale: 0.04%ZZee

W Boson MassxxxNew world average: MW=80398 25 MeVUltimate Run 2 precision: ~15 MeV

W Boson WidthNew world average: W=2095 47 MeV

Standard Model prediction: W =2091 2 MeV

Top Quark MassRather large pure samples available:166 events: S/B=4/1Perform simultaneous fit for Top quark massJet energy scale (MW=Mjj)dominant systematic uncertainty

Top Quark Mass Resultsmtop=170.9 1.8 GeV/c2 Prediction from LEP1, SLD, MW,W: 178.9 +11.7-8.6 GeV/c2

MW, mtop and mHiggsIndirectly: mH114 GeV@95%CL Standard Model excluded at 68% CL

MW, mtop and mHiggsIndirectly: mH114 GeV@95%CL Standard Model allowed at 95% CL

W/Z+Higgs with Hbb For mH

Zbb resonanceBoth collaboration succeeded in extracting a signal consistent with Z->bb out of an enormous QCD bb backgroundEnergy scale and resolution so far consistent with simulation4.4

H WW(*) l+l-nn

Higgs mass reconstruction impossible due to two neutrinos in final stateMake use of spin correlations to suppress WW background:Higgs has spin=0leptons in H WW(*) l+l-nn are collinearMain background: WW production160 GeV Higgs

Higgs Cross Section LimitRatio of limit to SM about 5-10 with 1 experiment with 1 fb-1CDF+D0 combination ongoing more data comingexperimental improvements ongoing/SM=5

Beyond the Standard Model

Problems of the Standard ModelLarge fine-tuning required:mH

Whats Nice about SUSY?Radiative corrections to Higgs acquire SUSY corrections:No/little fine-tuning requiredParticles masses must be near EWK scaleUnification of forces possibleDark matter candidate exists:lightest neutral gauginoChanges relationship between mW, mtop and mH:Also consistent with precision measurements of MW and mtopwith SUSY

MSSM Higgs Boson SearchData mass distribution agrees with SM expectation mostly:CDF: Slight excess has a significance of 2.1 (cross section about 2 pb)D: slight deficit in that regionEvents/10 GeVh,A,H~ tan2

Supersymmetry Searches

Supersymmetry Parameter Space M(g)>289 GeV for M(q)M(g): M(q)>375 GeV, M(g)>410 GeV~~~~~

Exclusion of GUT scale parametersNice interplay of hadron colliders and e+e- colliders:Similar sensitivity to same high level theory parameters via very different analysesLEP excl.(chargino)LEP excl.(slepton)Tevatron excl.(squark/gluino)mSUGRA

Beyond SUSY

What else could be there?Strong theoretical prejudices for SUSY being trueHowever, we need to keep our eyes open particularly due to the lack of SUSY observationThere could be many other theories/particles, e.g.:Extra spatial dimensions: Solve hierarchy problem by making gravity strong at TeV scaleExtra gauge groups: Z, WOccur naturally in GUT scale theoriesLeptoquarks:Would combine naturally the quark and lepton sector????

ee and Mass SpectraDielectron mass spectrum and diphoton mass distributionsData agree well with Standard Model spectrumNo evidence for mass peak or deviation in tailee

High Mass ee and Resonance in diphoton or dielectron mass spectrum predicted in Z models (ee only): Spin 1Randall-Sundrum graviton (ee and ): Spin 2CDF: MG>889 GeV for k/MPl=0.1D: MG>865 GeV for k/MPl=0.1MZ>923 GeV for SM-like Z

Many More SearchesW

Inclusive Survey of High PT DataLook for new physics in all event topologies, e.g.:Photon+jet+muonPhoton+jet+electron 344 final states, 16,486 distributions!

(Ndata-NSM)/ (Nidata-NiSM)/i

Inclusive Survey of High PT DataLook for new physics in all event topologies, e.g.:Photon+jet+muonPhoton+jet+electron 344 final states, 16,486 distributions!Only sensitive if new physics is large and at high PTGood for looking for the unexpectedTypically less sensitive than dedicated searchesE.g. for WZ discovery 3 times more data needed than in dedicated search(Ndata-NSM)/ (Nidata-NiSM)/i

The Flavor Sector

Lifetimes: Bs, b, BcD Run 2 preliminaryPrecision tests of Heavy Quark Effective Theory with heavy B statesbJ/

Bs -Bs Oscillation FrequencyCDF Measurement:Prob. of stat. fluctuation: 8x10-8ms=17.77 0.10 0.07 ps-1|Vtd/Vts|=0.20600.0007 +0.008 (th.)-0.006CDFVtsH. G. Moser, A. Roussarie, NIM A384 (1997)D: 17

ms Measurement: Impact on Unitarity Triangle- Significant impact on unitarity triangle- Some new physics constrained tightlyZ. Ligeti et al., PRL97:101801,2006

Lifetime Difference: sLifetime difference also consistent with Standard Model

Bsm+m- Branching RatioStandard Model prediction:BR=(3.420.54) x 10-9A.J. Buras Phys.Lett.B 566, 115 (2003)Large enhancements e.g. in Supersymmetry possible

BR(Bs)excludedSevere constraints on SUSY parameter space~ tan6/mA4

CDF L=0.8 fb-1D L=2.0 fb-1Nexp1.472.3Nobs03Limit at 95%CL

Conclusions and OutlookTevatron + experiments operating wellAnalyses mostly based on 1 fb-1Already >2 fb-1 on tapePhysics result cover broad range: QCD thoroughly being tested: works very well even in complicated final states!Electroweak precision data getting more and more precise:mH

Bs Lifetime Difference s and Phase sIn agreement with SM prediction but ~1.5 offBs J/Using Bs J/, ASL() D obtains:

Jet and Photon Cross SectionsCross sections measured over wide kinematic and angular ranges

Diboson Production: W and ZProbe anomalous couplings of the electroweak gauge bosons

CDF Single Top Analyses

W Mass Systematic Uncertainties

New B statesObservations of new b-states and excited B mesons