LHC Symposium, May. 2, 2003 p. 1 Recent Results in High P T Physics from CDF Gregory Veramendi Recent Results in High p T Physics from CDF Gregory Veramendi UC Berkeley / LBNL (For the CDF Collaboration) Introduction: Data taking and CDF II upgrade Electroweak Results Top Results Searches for new Physics

LHC Symposium, May. 2, 2003 p. 2 Recent Results in High P T Physics from CDF Gregory Veramendi CDF data taking l Running stably since Feb. ’02 äSilicon sensitive to beam conditions l >150 pb -1 to tape l 5-8 pb -1 /week l ~82% efficiency l pb -1 used in current “winter” analyses July 2001 Approved for analysis Commissioning

LHC Symposium, May. 2, 2003 p. 3 Recent Results in High P T Physics from CDF Gregory Veramendi CDF Run II Upgrade TOF  =2  =3  =1 l Improved Si coverage ä|  | < 2 ä8 layers l Central Drift Chamber ä96 layers l Time of Flight l Expanded  coverage l Forward Calorimeter l Trigger äCOT tracks at L1 äSilicon tracks at L2

LHC Symposium, May. 2, 2003 p. 4 Recent Results in High P T Physics from CDF Gregory Veramendi Electroweak Program l Baseline Measurements äW/Z cross sections äRatio of W/Z cross section äLepton Universality äForward-Backward Asymmetry l Improve EWK parameters äW Charge Asymmetry - Constrains on PDFs äDiboson Production - Look for Anomalous couplings äW Mass Measurement - Dominated by Systematics W  e Z  

LHC Symposium, May. 2, 2003 p. 5 Recent Results in High P T Physics from CDF Gregory Veramendi  B(W-->l l ) l Clean Signature äIsolated lepton äMissing E T l High  & S/B l 72 pb -1 W-->  SampleBack.  B(W-->l l ) (nb) e386256% 2.64±0.01 stat ±0.09 sys ±0.16 lum  % 2.64±0.02 stat ±0.12 sys ±0.16 lum  % 2.62±0.07 stat ±0.21 sys ±0.16 lum

LHC Symposium, May. 2, 2003 p. 6 Recent Results in High P T Physics from CDF Gregory Veramendi  B(Z-->ll) SampleBack.  B(Z-->ll) (pb) e % 267±6 stat ±15 sys ±16 lum  % 246±6 stat ±12 sys ±15 lum l Require two isolated leptons äNegligible backgrounds l 72 pb -1 l Essential for Detector Calibrations äEnergy scale and resolution äID efficiency

LHC Symposium, May. 2, 2003 p. 7 Recent Results in High P T Physics from CDF Gregory Veramendi W and Z cross sections

LHC Symposium, May. 2, 2003 p. 8 Recent Results in High P T Physics from CDF Gregory Veramendi R and  W  (pp  Z)  (W)  (Z  ee)  (pp  W)  (W  e )  (Z) R R = Theoreticalprediction PDGSMPDG combined Exp Measure Extract R  (W) [GeV] e 9.88  0.24 stat  0.47 sys 9.88  0.24 stat  0.47 sys 2.29  0.06 stat  0.10 sys 2.29  0.06 stat  0.10 sys   0.27 stat  0.33 sys 2.11  0.05 stat  0.07 sys 2.11  0.05 stat  0.07 sys e+   0.18 stat  0.33 sys 2.15  0.04 stat  0.07 sys 2.15  0.04 stat  0.07 sys

LHC Symposium, May. 2, 2003 p. 9 Recent Results in High P T Physics from CDF Gregory Veramendi W   and Lepton Universality l Clean W   decays l Baseline for analyses using  ’s

LHC Symposium, May. 2, 2003 p. 10 Recent Results in High P T Physics from CDF Gregory Veramendi l Forward-Backward Asymmetry l Exploits forward coverage of electrons ä|  |<3 l Direct probe of ,Z couplings äSensitive to interference from new physics l High mass reach is unique to Tevatron l Results consistent with SM A FB using Dielectrons

LHC Symposium, May. 2, 2003 p. 11 Recent Results in High P T Physics from CDF Gregory Veramendi W  e Charge Asymmetry l A l constrains PDF’s l Charge ID and polar coverage essential l Uses new Calorimeter seeded Silicon tracking äConsistent tracking: |  |<2 äImprovement on Run I l Blind Analysis äResults: Summer

LHC Symposium, May. 2, 2003 p. 12 Recent Results in High P T Physics from CDF Gregory Veramendi Diboson Couplings:W  l Signature äOne high p T lepton äOne photon (  R(  -l)>0.7) äE T l Results consistent with SM äSM:  B(W  -->l  ) = 18.7 ±1.3 pb SampleBack.  B(W  -->l  ) (pb) e4333% 17.2±3.8 stat ±2.8 sys ±1.0 lum  3829% 19.8±4.5 stat ±2.4 sys ±1.2 lum /

LHC Symposium, May. 2, 2003 p. 13 Recent Results in High P T Physics from CDF Gregory Veramendi Diboson Couplings:Z  l Signature äTwo high p T leptons äOne photon (  R(  -l)>0.7) l Results consistent with SM äSM:  B(Z  -->ll  ) = 5.4 ± 0.4 pb SampleBack.  B(Z  -->ll  ) (pb) e114.6% 5.5±1.7 stat ±0.6 sys ±0.3 lum  144.0% 6.0±1.6 stat ±0.7 sys ±0.4 lum

LHC Symposium, May. 2, 2003 p. 14 Recent Results in High P T Physics from CDF Gregory Veramendi Diboson:WW l Search for W W production äDilepton + E T search l Consistent with SM äWait for more statistics l Precursor to SM Higgs Search /

LHC Symposium, May. 2, 2003 p. 15 Recent Results in High P T Physics from CDF Gregory Veramendi Top Program l Establish Baseline Measurements from Run I l Top cross section äPrecision test of QCD äProbe for non-SM Production l Top Mass äPreliminary Result äGetting machinery warmed up! l Many precision tests of top to come with more data Top spin polarization Production Cross Section Resonance production ? Production kinematics

LHC Symposium, May. 2, 2003 p. 16 Recent Results in High P T Physics from CDF Gregory Veramendi Production and Decay of Top l Top decays as a free quark ä  top ~ 4x s äBR(t->Wb) ~100% l 3 classes of signals äDilepton - 2 high-p T leptons, 2 b jets, E T - BR ~ 1/9 (e,  : ~5%) äLepton + Jets - 1 high-p T lepton, 4 jets (2 b’s), E T - BR ~ 4/9 (e,  : ~30%) äAll-hadronic: - 6 jets (2 b’s) / /

LHC Symposium, May. 2, 2003 p. 17 Recent Results in High P T Physics from CDF Gregory Veramendi Dilepton Cross Section l Signature äTwo high p T Isolated leptons äVeto Z, cosmic, conversion ä  (E T,l/j)>20 o, or E T >50 GeV äE T > 25 äTwo jets with E T >10 GeV äTotal transverse energy > 200 GeV l Expect S/B ~ 9, S~2.5 l Find 5 candidate events in 72 pb -1 l Expect 0.3 ± 0.12 background events  tt =13.2 ±5.0 stat ±1.5 sys pb NLO:  tt (  s=1.96 TeV)= pb (hep-ph/ (ML Mangano et al)) / //

LHC Symposium, May. 2, 2003 p. 18 Recent Results in High P T Physics from CDF Gregory Veramendi Lepton + jet Cross Section l Signature äOne high p T Isolated lepton äVeto Z, cosmic, conversion äE T > 20 GeV ä3 or more jets with E T >15 GeV ä1 jet with secondary vertex tag l B tag improves S/B 1/6  3/1 l Find 15 candidate events in 57.5 pb -1 l Expect 3.8 ± 0.5 background events /  tt =5.3 ±1.9 stat ±0.8 sys pb control signal

LHC Symposium, May. 2, 2003 p. 19 Recent Results in High P T Physics from CDF Gregory Veramendi Top production cross sections

LHC Symposium, May. 2, 2003 p. 20 Recent Results in High P T Physics from CDF Gregory Veramendi Top Mass l Select l +4 jet events äSame as cross section, but no b tags l 33 candidate events l Method ä24 combinations in an event ä2-C fit applied, lowest  2 is chosen to get mass for each event äA continuous likelihood method is used with parameterized mass templates äM top is the minimum of log- likelihood distribution l Systematic uncertainty to improve with understanding of detector

LHC Symposium, May. 2, 2003 p. 21 Recent Results in High P T Physics from CDF Gregory Veramendi Top mass with b tag l B tag äLower backgrounds äImproves mass resolution l Same selection äRelaxed 4 th jet requirement ä11 candidates l Work in Progress äResults by Summer

LHC Symposium, May. 2, 2003 p. 22 Recent Results in High P T Physics from CDF Gregory Veramendi Lepton + Jets Candidate Events tt l + jet candidate: Nov run: event:  (CMUP) + 4 jets p T (  ) = 54.4 GeV E T j = 96.7, 65,8, 54.8, 33.8 GeV E T = 40.8 GeV µ Jet 1 Jet 2 Lego view Jet 3 Jet 4 muon electron photon

LHC Symposium, May. 2, 2003 p. 23 Recent Results in High P T Physics from CDF Gregory Veramendi New Physics?? l Where to look? l Two Approaches at CDF l Model driven searches äDrell-Yan spectrum search äLeptoquarks äDoubly charged Higgs äSUSY l Signature driven searches äDijet spectrum äCHArged Massive Particles äPhoton final states

LHC Symposium, May. 2, 2003 p. 24 Recent Results in High P T Physics from CDF Gregory Veramendi Search in Drell-Yan Spectrum l High Mass Dileptons äelectrons & muons used l Sensitive to Z’ and Randall-Sundrum Graviton l No excess observed e+e-e+e-  +  -

LHC Symposium, May. 2, 2003 p. 25 Recent Results in High P T Physics from CDF Gregory Veramendi Search in Drell-Yan Spectrum RunLum.(pb -1 )Mass Limit (95% CL) (GeV/c 2 ) Run1a (1.8TeV) Run1b (1.8TeV)90640 Run2(1.96TeV)72665 Already Improving on Run I!!

LHC Symposium, May. 2, 2003 p. 26 Recent Results in High P T Physics from CDF Gregory Veramendi 1 st Generation Scalar LeptoQuarks l LQLQ  e + e - qq ä2 high E T electrons, 2 jets l 0 events observed äBackground: 3.4±3 events l M(LQ)>230GeV/c 2 (R1:>220) l LQLQ  qq ä2 high E T jets, large E T l 42 events observed äBackground: 43±11 events l 60<M(LQ)<107GeV excl. /

LHC Symposium, May. 2, 2003 p. 27 Recent Results in High P T Physics from CDF Gregory Veramendi H ++ Search l Arises in extensions of SM (L-R symmetric) l Same sign leptons äLow backgrounds äStudy with less integrated luminosity l Dielectron channel äSignal above Z pole äLow mass used as control - 0 events observed - Background: 0.6±0.5 l Binned Search: 0 events

LHC Symposium, May. 2, 2003 p. 28 Recent Results in High P T Physics from CDF Gregory Veramendi DiJet Search  Consistent with SM  Set limits on New Physics  Axigluons or flavor universal colorons:  200 < m < 1130 GeV/c 2  Excited quarks:  200 < m < 760 GeV/c 2  Color octet techni-  ’s:  260 < m < 640 GeV/c 2  E6 diquarks:  280 < m < 420 GeV/c 2  W‘ :  300 < m < 410 GeV/c 2

LHC Symposium, May. 2, 2003 p. 29 Recent Results in High P T Physics from CDF Gregory Veramendi Highest Dijet mass event Run event Dijet Mass = 1364 GeV (corr) cos  * = 0.30 z vertex = -25 cm J1 E T = 666 GeV (corr) 583 GeV (raw) J1  = 0.31 (detector) = 0.43 (correct z) J2 E T = 633 GeV (corr) 546 GeV (raw) J2  = (detector) = (correct z) CDF Run 2 Preliminary Run I max: 1040 GeV

LHC Symposium, May. 2, 2003 p. 30 Recent Results in High P T Physics from CDF Gregory Veramendi CHArged Massive ParticleS l Stable charged particle that escapes detector l Massive  Slow moving äUse TOF detector l 7 events observed äBackground: 2.9±3.2 events l Candidate: stop äNLSP in GMSB l Isolated: M(stop) > 108 GeV änon-isolated M(stop) > 95 GeV äLEP: M(stop)>95 GeV

LHC Symposium, May. 2, 2003 p. 31 Recent Results in High P T Physics from CDF Gregory Veramendi DiPhoton Search l 2 central photons E T >13 GeV l Cosmic and beam halo rejection l Good agreement with SM l 0 Diphoton + Lepton Events observed ETET / M 

LHC Symposium, May. 2, 2003 p. 32 Recent Results in High P T Physics from CDF Gregory Veramendi Run Iia Prospects l Towards the next few years: Sample W ’ l Z ’ ll WV (W ’ l, V=W, ,Z) ZV (Z ’ ll, V=W, ,Z) tt (mass sample,  1 b-tag) Run I 77k 10k Run IIa 2300k 202k Event yields per experiment (2 fb -1 )  M W ~40 MeV  M t ~ 3 GeV DØ / CDF Run 2a Prediction

LHC Symposium, May. 2, 2003 p. 33 Recent Results in High P T Physics from CDF Gregory Veramendi Summary l Run 2a is well underway! äRe-established baseline electroweak measurements äTop program has been launched! äMany exotics measurements improve on Run I results! l We look forward to larger datasets and testing the Standard Model to even greater precision

LHC Symposium, May. 2, 2003 p. 34 Recent Results in High P T Physics from CDF Gregory Veramendi Backup Slides

LHC Symposium, May. 2, 2003 p. 35 Recent Results in High P T Physics from CDF Gregory Veramendi A FB backup

LHC Symposium, May. 2, 2003 p. 36 Recent Results in High P T Physics from CDF Gregory Veramendi WW cross section backup

LHC Symposium, May. 2, 2003 p. 37 Recent Results in High P T Physics from CDF Gregory Veramendi Dilepton backup

LHC Symposium, May. 2, 2003 p. 38 Recent Results in High P T Physics from CDF Gregory Veramendi Dilepton backup

LHC Symposium, May. 2, 2003 p. 39 Recent Results in High P T Physics from CDF Gregory Veramendi Secondary Vertex Tagging Secondary Vertex +L xy d0 Jet axis Primary Vertex Prompt Tracks  Signature of a b decay is a displaced vertex:  Long lifetime of b/c hadrons (c  ~ 450  m)  B hadrons travel L xy ~3mm before decay with large charged track multiplicity.  Algorithm:  Look for displaced vertices: all combination of at least 2 tracks  Jet is tagged as b-jet if L xy /  xy >3 (typical  xy ~150  m)  (event tag) = 45  1  5 %

LHC Symposium, May. 2, 2003 p. 40 Recent Results in High P T Physics from CDF Gregory Veramendi L+jets backup

LHC Symposium, May. 2, 2003 p. 41 Recent Results in High P T Physics from CDF Gregory Veramendi Top Mass backup

LHC Symposium, May. 2, 2003 p. 42 Recent Results in High P T Physics from CDF Gregory Veramendi Diphoton Backup Backgrounds in l   W   Z   Z   e  +jet P(e fake  )=2% l Limit Set: äM c >113 GeV

LHC Symposium, May. 2, 2003 p. 43 Recent Results in High P T Physics from CDF Gregory Veramendi DY search backup

LHC Symposium, May. 2, 2003 p. 44 Recent Results in High P T Physics from CDF Gregory Veramendi Dijet mass backup  Axigluons or Colorons:  200 < m < 1130 GeV/c2  Run I:200<m< 980GeV/c2  Excited quarks:  200 < m < 760 GeV/c2  Run I:200<m< 570&580 <m< 760  Color octet techni-r’s:  260 < m < 640 GeV/c2  Run I:260<m< 480 GeV/c2  E6 diquarks:  280 < m < 420 GeV/c2  Run I:290<m< 420 GeV/c2  W‘ :  300 < m < 410 GeV/c2  Run I:300<m< 420 GeV/c2

LHC Symposium, May. 2, 2003 p. 45 Recent Results in High P T Physics from CDF Gregory Veramendi Leptoquark search backup l eeqq search äDominant Back. - Drell-Yan, top ee search:

LHC Symposium, May. 2, 2003 p. 46 Recent Results in High P T Physics from CDF Gregory Veramendi CHAMP backup Signal W-->e Control:

LHC Symposium, May. 2, 2003 p. 47 Recent Results in High P T Physics from CDF Gregory Veramendi H ++ Search Dominated by DY OPAL Limit: m> depending on coupling

LHC Symposium, May. 2, 2003 p. 48 Recent Results in High P T Physics from CDF Gregory Veramendi Higgs Sensitivity l Status as of 2000 l Studies with Run II ongoing äRun II simulation äRun II Efficiencies l New report expected in June ‘03