cdf - stato dell’analisi world + cdf run ii marco rescigno – infn/roma csn i roma, 16 maggio...

CDF - Stato dell’analisi

World + CDF Run II

Marco Rescigno – INFN/Roma

CSN I Roma, 16 Maggio 2005

• Stato del Tevatron• Stato delle pubblicazioni• Risultati preparati per le

conferenze invernali– Breaking news

– Non solo Bs & MTop

• Enfasi sul lavoro italiano• Prospettive per estate ‘05 e

oltre– Physics case for 2009

M.Rescigno - Riunione CSNI 16 Maggio 2005

Luminosity Delivered/Recorded

0

1

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3

4

5

6

7

8

9

0 1 2 3 4 5 6 7 8 9 10

End FY

fb-1

Base plan

Des ign plan

Run I statistics


Integrated Lum to Date (FY05)

• In perfetta tabella di marcia per centrare il goal piu’ambizioso:– Design Plan = ~8fb-1

– Base Plan =~ 4 fb -1


TeV Status

1 x 1032

• Tevatron plans:– Electron cooling

installed!• Commission by end of FY05• Expect 40% lum. increase

– Proton slip stacking• +25% p-bar production

acceptance

• Peak luminosity – Best 1.35 x1032 (12/5/05) !!!– Common > 1.0 x1032 Delivered

almost 1 fb-1 !– ~ 800 pb-1 on tape/experiment

• Data set used for these results– ~ 350 > 3-4 x Run 1

Peak Luminosity

Record: 1.35x1032 cm-2sec-1

Store efficiency


you are here

AD Projections (design plan)


Run IIb Triggers and Physics Priorities

• Even with all upgrades, we cannot maintain an “all inclusive” trigger table for Linst>1.5E32cm-2s-1

• We will be forced to sacrifice some fraction of our physics program at high luminosity

• Need to establish priorities based on physics goals:– RunIIb Physics Priorities and Triggers Committee

• Need to follow closely on-going trigger upgrades– Level 1 Track trigger (stereo matching – lower fake rate)– SVT (more patterns, faster processing) (see details)– Level 2 decision (x2 faster - done)– Event Builder, Level 3 (increase L2/L3 Bandwidth)– New TDC’s (faster redaout)– Data Logger (done)

By 2005


Italian group contributions

• B/charm physics– Topics: Bhh (ACP, BR), bp, BsDs & lDs (for Bs mixing), Bs

BdK*, BK (ACP, BR), D0hh (BR, ACP), D+πππ, pentaquark search

– Groups involved: Padova, Pisa, Roma, Trieste

• High pt physics– Topics: Zbb, Higgs searches, top physics, hadronic top, top

backgrounds, b-tagging, W+jets, forward W’s– Groups involved: Bologna, Padova (Trento), Pisa, Roma

• Contributions to crucial analysis tools– Particle Identification with TOF and COT dE/dx– High-Pt btagging devel– Jet Energy resolution and scale

• Most work in close cooperation amongst Italian groups• A lot of work in close cooperation with non-Italian group


Responsabilita’ Italiane nell’ analisi

• High-Pt B-tagging co-conveener (D.Jeans)

• Jet Energy resolution group (T.Dorigo)• All Hadronic Top analysis group (P.Azzi)

• B-group convener (S.Giagu)• CP violation and decays sub-group co-

conveener (S. de Cecco)

• Mixing Analysis Coordinator (F.Bedeschi)


Run II Publications• 29 papers published or submitted• 34 under Collaboration reviewyear 2001

First CollisionCommissioning

2002First Physics

data

2003 2004 2005Goal

# of papers 4 17 8 + 34

2005 +Under ReviewPublished before 2005

HeavyFlavour

EWK/QCD

Top

Searches

• Searches and Top papers increasing their share

Lowest order x-checkQCD & VB cross sections


Run II Inclusive Cross Section•Using Run I cone algorithm & unfolding

range increased by ~150 GeVSimilar result using Kt algorithm

(first time at collider)

•Comparison with pQCD NLO (JETRAD) (over almost nine orders of magnitude) disagreement at high Et reduced

Data syst. dominated by jet energy scale NLO error mainly from gluon at high x

No hadronization corrections appliedto NLO prediction relevant @ low

jetTE


b/c cross sections

Beauty hadron productionPhys. Rev. D71, 032001 (2005) (30 pb-1 J/ trigger) Data 29.4±6 b

Theory (FONLL) 27.5 b OK!

Charm meson production Phys. Rev. Lett. 91, 241804 (2003)

(6 pb-1 SVT data only!)Theory: Cacciari,Nason (FONLL)JHEP 0309,006 (2003) OK!

High-Pt b-jet with vertex tag (300 pb-1 Jet Data)

1.4 higher than Pythia - NLO comparision soon

NEW !


W/Z cross sections

• In accordo con il calcolo NNLO (Stirling, van Neerven)

• Sistematica sulla luminosita’ (6%) dominante

• PDF next (2%)

CDF 04()

CDF 04(e)

CDF04(e+)

CDF04(e, plug)

CDF04()

CDF 04(e)

CDF 04()

CDF04(e+)

CDF04()


Testing ground for new Matrix Element MC generators (Alpgen)

Important background (when jet==b-jets) to top (and Higgs)

Syst. dominated by jet-energy scale.

Working now on:

W+Jet Cross Section

MC AlpGen + Herwig

AlpGen W+1, 2, 3, 4 partons ME calculation

Herwig W inclusive & parton shower

M.L.Mangano’s matching prescription to merge MC samples with different parton final states

Detailed kinematics checks

Reduce syst of jet correctionsZ+Jet W/Z+b-jets/c-jets with dedicated tagging


W+bb/cc bkg is estimated via ALPGEN MC

Upper limits xBR derived using binned maximum likelihood technique to the di-jet mass distribution

Limits range from 5 to 3 pb for

110 GeV < MH<150 GeV. (better than Run I)

A First Look at WH in Run II

details


Top pair Cross sections

•Molte nuove misure con ~300 pb-1 in differenti canali e con tecniche differenti•In accordo con la teoria, errore sistematico comparabile ~= errore sistematico teorico

Jet


tt - All Hadronic Channel• Final State: 4 jets da W, 2 b-jets

(special multi-jets trigger)• Large statistics, but huge QCD

background: – S:B1:2500

• Increased S:B by requiring: ET>280GeV – Topological cuts (aplanarity, centrality)

• Event selection efficiency 6.7%o S:B 1:24

– @ least 1 b-tag jet: S:B 1:4

• Measure Xs with 8 Njets 6 & 1 b-tag jet

Updated Result (apr 05):

Obs.817 back.684• Prossimi step:• Nuova misura di sez. d’utro con background da MC (alpgen)• Misura della massa con metodo template

pbsyststattt 8.32.5

4.39.4 6.7)()(7.16.7

Top/EWK


Top mass is a fundamental SM parameter

CDF&D0RUNII

• Constrain Higgs mass in SM together with Mw and other electroweak precisionMeasurements•A key to understand electroweak symmetry breaking

Mtop vs MW


W Mass

electron 200 pb-1 muon 200 pb-1

No result (yet), waiting among other thing next iteration PDF including new W charge asym. from CDFII

Run II: MW = xx.xxx ± 0.076 GeV (current estimated electron+muon syst.+stat. uncertainty)

Run I : MW = 80.433 ± 0.079 GeV


W mass systematics

Work in progress on recoil modelWork in progress on e-energy scale (passive material)Now combined error is 76 MeV (stat+syst)

Expect 50 MeV combined (CDF only) by next yearGoal is ~ 20 - 30 MeV/experiment by end of run II

plots


n

W+

W-

t

t

b-jet

b-jet

jet

jet

Mjj(W)

W ->2 jets calibrano la scala dei jet negli eventi top stessi

Stessa scala per b-jet e light quark (per ora)

Prima misura di Mtop con le nuove jet corrections Nel campione lepton+jet e’ possibile ricavare un

constraint ulteriore alla scala dei jet dal Wjj Fit contemporaneo 2-D alla massa del top e alla

scala dei jet (JES) Considerato sin dai tempi del TDR come il

metodo migliore per CDF II

Mtop con “in-situ” jet calibration

Cruciale avere un elevato numero di double b-tagged events

Riduzione del combinatorio nell’assegnazione dei jet ai partoni (contibuto dominante alla larghezza sperimentale del picco di top)

RUNI

5 events


Determine true “parton” E from measured jet E in a cone 0.4

Correction to central region using dijet balance: to make response uniform in

Correction to particle jets using dijet MC tuned for single particle E/P, material, and fragmentations: due to non-linear and non-compensating cal.

Out-of-Cone :correction to parton”top-specific correction” to light quark jets and b-jets separately

Jet Energy correction

Non-uniform response

Diff. resp.of /i+-Non-linearity

Shower, frag.

F:%5CFlopy%5CUsers%5Ccanelli%5CDocuments%5CJES%5CTalks%5CTeV4LHC%5CTeVandATLASInSituJets.ppt


Jet-energy scale Syst. migliorata di un fattore 2 rispetto al 2004:•Calorimetri ricalibrati •Migliore simulazione Monte Carlo del detector•Procedura rivista completamente

La sistematica e’ ora meglio o allo stesso livello che nel Run I.

RunII

RunII 2004

RunI

Frac. Syst. uncert. vs Pt

Central region

Scala dell’energia dei Jet


2 7 GeV/c)JESstat(5.31M 7.36.3top

Expected error

mt e mjj dal fit 2-d

2tag 1tagT 1tagL 0tag

bkgds 0.7+-0.2 7.6+-1.2 10.2+-1.7 no est

Data 16 57 25 40

Bkg details

)stat(10.0JES 78.0

80.0


Combined Mtop and JES Fit20% improvement in JES


)stat(10.0JES 78.0

80.0


Mtop summary

Compare to 1D Template fit

2

2

7

7

GeV/c5.31

GeV/c )(7.1)JESstat(5.31M1.40.4

7.36.3top

syst

Add other systematics B-jet scale Background shape

(details)


Fin qui la misura mondiale piu’ precisa in lepton+jets channel at CDF con “in situ” JES

Ulteriori misure verranno updatate presto:- Lepton+Jets con Matrix Element- Dilepton con Matrix Element,

neutrino weighting Il “blue band” plot ricomincia a

muoversi spesso!

Outlook su Mtop

Assumendo 1 GeV/c2 sistematico totale (ora 1.7) a parte la JES

Mtop < 2 GeV/c2 solo con questa tecnica e in questo canale con ~2 fb-1 di Run II

Con Jet probability tags il numero di eventi double tag e’ in linea con le previsioni


b-jet energy scale and resolution

• Studies on b-jet energy scale using Zbb (dedicated trigger – italian achievment!)

• Z(bb) peaks in the right place within 2% (statistical error) using default corrections

• S/B enough to even better constrain b-jet energy scale with more data

• Good testing ground for developing advanced jet algorithm

Run I


B-physics highlights• Primi risultati sul mixing del Bs• Prospettive per l’osservazione del

fenomeno• Non solo mixing

– Charmless decays

– Bs lifetime difference

– Indirect searches

MIXING


Experimental lower limit on ms

ms constraint to U.T.

Fit with all constraints (winter 05):ρ = 0.190 ± 0.044 η = 0.349 ± 0.024

UT triangle & ms


Δms = 20.5 ± 3.2 ps-1

[14.4, 27.1] @ 95% CL

ms = 18.9 ± 1.6 ps-1

[15.7, 23.0] @ 95% CL

SM CKM-fit prediction for ms

New Physics @ 3 If ms > 30 ps-1 By 2010 with expected exp. and th. ImprovementsNew Physics @ 3If ms > 25 ps-1

(with all constraints)(Δms not used) compatibility plot

UT triangle fit


Kaon

Analysis Strategy

• Bs signal collection and reconstruction– semileptonic: lepton + 1SVT trk – fully hadronic: 2 SVT track

• Bs decay time–check ability to properly measure lifetime despite SVT trigger bias –proper time resolution

• Tag initial flavour of the Bs

– Use leptons and Jet Charge on opposite side– calibrate on Bd mixing

Bs Mixing– performed a “Blind Analysis”


CDF “Bs Mixing Group”• ~70 physicists ( 22 italians, 9 phd/post-doc) in CDF are actively involved in the Bs mixing project– Improving the trigger strategy– Understanding the detector– B Lifetime Measurements– Flavor Tagging– B0 Mixing– Bs Mixing

• Big collaborative effort:–Analyse 3 different datasets–Reconstruct 0(20) different decay modes–Perform 2 parallel analysis for both hadronic and semileptonic modes–Study 4 different tagging algorithms–TOF and dE/dx calibrations


Hadronic Bs signals

)(0 Sss DDB][ KK

NBS = 526±33

S/B ~ 2

M 15 MeV

)(

)(00

**0

ss

ssss

DB

DDDB

“Satellites”:

( Not used in this analysis )

Other signals


Semileptonic Bs Signals

•Missing PT No Bs mass peak

•Use Ds mass signals

•Charge correlation between ℓ and Ds

– ℓ + Ds- : “Right-sign” = signal

– ℓ + Ds+ : “Wrong-sign” = background

• Right-sign peak is not pure signal– ~20% background:

» Ds + fake lepton from primary

» B0,B+ Ds D X with D ℓ X

» c-c backgrounds

SD

D

)(0 Sss DXlDB Other signals


Signal yields summary

BsDsDs 526±33 (1.8)

BsDsDsK*K 254±21 (1.7)

BsDsDs 116±18 (1.0)

B+D0D0K ~6200

B0D*+D*+D0 ~2800

B0D+D+K ~5600 Bsℓ Ds ; Ds 4355±94 (3.1)

Bsℓ Ds ; Ds K*K 1750±83 (0.4)

Bsℓ Ds ; Ds 1573±88 (0.3)

B+ℓ D0 ; D0 K ~100K

B0ℓ D*+ ; D*+D0 ~25K

B0ℓ D+ ; D+ K ~52K

(S/B)

(S/B)

Hadronic Bs modes~900 events

Semileptonic Bs modes~7700 events

O(104) calibration modes

O(105) calibration modes


Hadronic B-lifetimes results

(B+) = 1.66 ± 0.03 ± 0.01 ps (B0) = 1.51 ± 0.02 ± 0.01 ps(Bs) = 1.60 ± 0.10 ± 0.02 ps

Systematic summary

(B+)/(B0) = 1.10 ± 0.02 ± 0.01

(Bs)/(B0) = 1.06 ± 0.07 ± 0.01

± (stat) ± (syst)

(B+) = 1.653 ± 0.014 ps (B0) = 1.534 ± 0.013 ps(Bs) = 1.469 ± 0.059 ps

HFAG 04 average

(B+)/(B0) = 1.06 ± 0.02

(Bs)/(B0) = 1.00 ± 0.01

Theory prediction:


Bs decay time resolution

• Hadronic:– <ct

0>: ~ 30 m (100 fs)– p/p < 1%

• Semileptonic– <ct

0>: ~ 50 m (167 fs)– p/p ~ 15% (K factor due to missing neutrino)

2

20

p

ct pctct

Vertex resolution(constant)

Momentum resolution

(proportional to ct) Hadronic

Semileptonic

ctps

(ct

)


Flavor tagging – Soft Leptons

Tag type D2 (%)

Muon (0.70±0.04)%

Electron (0.37±0.03)%

2ndary vtx (0.36±0.02)%

Displaced track

(0.36±0.03)%

Highest p jet (0.15±0.01)%

Total (exclusive)

~1.6%

Run

I

Run

II


Flavor tagging – Jet Charge

Tag type D2 (%)

Muon (0.70±0.04)%

Electron (0.37±0.03)%

2ndary vtx (0.36±0.02)%

Displaced track

(0.36±0.03)%

Highest p jet (0.15±0.01)%

Total (exclusive)

~1.6%

Run

II

Run

I


Amplitude Scan for B0d(s)

•Introduce “Amplitude” in Likelihood

• Amplitude scan– Fit the amplitude for fixed m• Amplitude: A, uncertainty: A

– Repeat the fit with different m

•Amplitude will be consistent with– 1 if there is mixing at the frequency m – 0 if there is no mixing

• Example for B0 Hadronic sample– Amplitude = 1 at m = 0.5 ps-1

– Amplitude = 0 at m >> 0.5 ps-1

tmcosDAeL /ttsig 1

1

Hadronic B0 sample

• 95% CL limit is : ms > 14.5 ps-1

• Sensitivity: 18.2 ps-1


Amplitude Scan result

Hadronic has no sensitivity (yet) but is better behaved at high

ms**Systematic errors are negligible with respect to statistical in both cases**

details


CDF+World Combined Result

• World Average + CDF Run II– Sensitivity: 18.6 ps-1

– Limit 14.5 ps-1

•CDFII combined result•Sensitivity: 8.4 ps-1

•Limit: ms > 7.9 ps-1 @ 95% CL


Future perspectivesWith the same data:

• Add new tagging algorithm Same Side Kaon Tag• Incremental changes in existing algorithm (new Jet Charge +20% D2)• Add more channels

•BsDs3•BsDs*

• Add signals from other triggers• Improve decay time resolution with PV event by event (detail)

With new data:

• Increased Luminosity• Use new trigger strategies

•2 SVT Tracks + oppsite side muon (pt>1.5 GeV) at trigger level (already in place since summer 2004 Can take data even at higher luminosity)


Same side Kaon tagging

B0

B-

Bs

K*0

K+

K- K*0

Exploits the charge correlation between the b quark and the leading product of b hadronization.

B+ case is complicated by the contributionof excited Bd and Bs states

Already used in md measurement,gives an D2 = 1.1 0.4 %

SS Kaon tag possible with PIDIssues:•Need to know D2 to set a limit on md

•Try to get it from MC•Underlying event backgound


MC-data comparison with PID

Apply PID, T.O.F. and dE/dx combinedIn a Likelihood approach L(K)/L()

good agreement!Issues:•Particle fractions in MC•PID resolution tuning•backgrounds

# “Kaons”

Plong “Kaons”


Verso il 2009 – Bsmixing

• Estrapolazione in forma analitica (riproduce attuale risultato con gli appropriati input)

• Si assume di integrare la meta’ della luminosita’ dal 2007 in poi (B-physics solo da meta’ store)

• Sensibilita’ al range favorito dal fit di unitarieta’• In case of no signal 95% C.L. up to 30 ps-1 with 4 fb-1 • Improvement all’analisi credibili ma labor-intensive…. More proj

ections


B hhDecadimenti Charmless del Bs:

• Constraint su da misure di BR• Test delle violazioni di SU(3)

nei conti teorici• Misura pulita di in futuro

• Risultati basati su 180 pb-1

presentati a ICHEP04:– Branching fractions– BdK CP asymmetry– Limiti su processi rari

• Analisi raffinata in vista della pubblicazione

• migliore modellizazione risposta dE/dx

• Sistematiche ridotte Preblessed 12 Maggio!


Bhh results• Branching ratios and CP asymmetry new(previous)

• Rare two body decay modes

CDF/180 pb-1 Babar/200 fb-1 Belle//140 fb-1

N(BdK+) 536 (509) 1600 1030

ACP (BdK+) -0.022±0.078±0.004(-0.04±0.08±0.01)

-0.133±0.030±0.009

-0.088±0.035±0.013

BR()/BR(K) 0.206±0.052±0.017 0.239±0.056±0.036)

0.25± 0.04 0.24 ± 0.04

fs/fd

BR(BsKK)/BR(BdK)

0.463±0.079±0.061 (0.496±0.087±0.093)

- -

0.52±0.12 (hep-ph/0402112)

Large SU(3) breaking


Bhh results• Branching ratios and CP asymmetry new(previous)

• Rare two body decay modes

BR/10-6 @ 90% C.L. CDF/180 pb-1 PDG 2004 TheoryBR(BdK+) <1.8 (<3.1) <0.6 [0.01-0.2] QCDF

BR(Bs+) <1.6 (<3.4) <170 [0.03-0.16] QCDF0.42 ± 0.06 PQCD (hep-ph/0404028)

BR(Bs+) <5.4 (<7.4) <210 [6-9] different approaches


Bhh futuro a breve• Nuovo S/W di ricostruzione e

360 pb-1 (fino ad Agosto 2004)

• Combined yield 2700 ev!– Was 900 ev. with 180 pb-1

• 1600 BdKfactories)• Ci si aspetta una risoluzione

del 4% su ACP

• BsKvisibile o contraddizione con la teoria– ACP attesa grande

• Annichilation mode Bspossibile (analisi dedicata)

• Misura della vita media nel decadimento BsKK– dovrebbe essere ~consistente

con la vita media dello stato Light del Bs


Bs J/ and• BS J/ +- K+K-

• BVV decays: Heavy and Light state decay with distinct angular distributions and different lifetimes.

Back

• Result (260 pb-1)– 1/4 heavy - 3/4 light state– Lifetime - heavy ~ 2 x light

S / S = 0.71 +0.24-0.28 ± 0.01

• Lifetime difference measures“same” CKM element as m (oscillation frequency)

• Exciting!! Need more data– ~ 5 % sensitivity by 2009 ms = 10 ps-1 S / S = 7%

• Test still possible CP violation effect in Bs mixing


Bs→

Charmless BVV decays

Bd→K*

estimated yield:

123 events

estimated yield:

44 events

Bs→ 12 events (170 pb-1) 44 events (360 pb-1)

•Measured ) with 180 pb-1

•Updatee with 360 pb-1

•Will measure polarization soon with significance similar to what is seen at B-factories


Rare decays: Bs

• Chiaro segnale di Nuova Fisica: – SUSY tan6

• Correlato con g-2 anomaly

• Serrata competizione tra CDF e D0:– Nuovo limite da CDF: maggiore accettanza

(forward muon) + analisi multivariata CDF-04 CDF-05 D0-05 D0-05 BaBar

Luminosity 171 pb-1 365 pb-1 240 pb-1 300 pb-1 111 fb-1

Bs→ 90% (95%) 5.8x10-7(7.5x10-7) 1.6x10-7(2.0x10-7) 4.1x10-7(5.0x10-7) (3.7x10-7)

Bd→90% (95%)1.5x10-7(1.9x10-

7)

4.2x10-

8(5.5x10-8) 8.3x10-8

SM Expectations

BR(Bs(d)) =

3.5x10-9 (1.0x10-10) SM diagrams SUSY diagrams

G. Buchalla, A. Buras, Nucl. Phys. B398,285


Verso il 2009 – Bs

• Estrapolando l’attuale analisi• Limite asintotico 2E-8 (4-5E-8 con 4 fb-1)• Sensibilita’ al range favorito in molti scenari esotici

R. Dermisek et al., hep-ph/0304101

7.510-7

SO(10)

Escluso con questi

parametri dal n

uovo

risulta

to


J. Ellis et al., hep-ph/0504196CSSM

Verso il 2009 – Bs

• Estrapolando l’attuale analisi• Limite asintotico 2E-8 (4-5E-8 con 4 fb-1)• Sensibilita’ al range favorito in molti scenari esotici

2E-8

5E-8

CDM

bs


Conclusions• Tevatron is picking up

– Could exceed even best luminosity expectations!• A diverse physics program is in full swing• On course for:

• Detailed tests of QCD• Top mass resolution ~ 2 GeV/exp• W mass resolution ~ 30 MeV/exp• Bs mixing observation (and much more in B sector)• Setting strong limits on new physics and developing

technology for Higgs searches in many channels

• Italian doing excellent work across the board (both on the detector/upgrades and analysis)

• With a consistent Tevatron performance we may observe hints of New Physics (direct or indirect) before LHC turns on!

Backup


The Upgraded CDF Detector

New

Old

Partially new

Forward muonEndplugcalorimeter Silicon and drift

chamber trackers

Central muonCentral calorimeters

Solenoid

Front endTriggerDAQOffline

TOF

Back


Forward W’s

=2.874±0.034(stat)±0.167(syst)±0.172(lum) nb

Study of forward W’s improved by better tracking and simulation

180 pb-1

Spring 0464 pb-1


Rare Decays

• Sensitive to SUSY– Bs results @ 95% CL

BNL: E821Jan. 2004

CDF 365 pb-1

CDF - Run I

D0 300 pb-1

Back


Charm and Bottom Physics• 9 papers published or submitted

– Ds, D+ mass difference (Phys. Rev. D68, 072004, 2003)– Search for D (Phys. Rev. D68, 091101, 2003)– Prompt Charm cross section (Phys.Rev.Lett.91, 241804(2003)– Observation of X(3872) - used 220pb-1 (PRL)– D0 relative BR and CP asymmetry (123 pb-1) - PRL – Inclusive J/ and B cross sections (40 pb-1) - 1st draft– Hadronic Moments in semileptonic B decays (180 pb-1)– BR and CP Asymmetry in B+ K+ and BR in Bs (180 pb-1)– Lifetime Difference in Bs system (220 pb-1)

• 9 analyses in godparent publication review– PentaQuark search: 3/2(1862) (220 pb-1)– B hadron masses including Bs and b (220 pb-1)– BR of b c (65 pb-1)– BR of Bs Ds / BR of B0

D- + (64 pb-1)– BR of Cabbibo suppressed B+ J/ + – BR and CP Asymmetry in B hh’(180 pb-1)– Search for b ph(180 pb-1)– Bc mass in J/mode– X(3872) dipion mass– Bs (2s) decay BR


Top Physics• 6 paper published or submitted

– Top cross section in di-lepton (197 pb-1) – PRL– Top pair cross-sections in lepton+jets

• Kinematics• Secondary vertex b-tag + kinematics - PRL • Secondary vertex b-tag

– Search for anomalous kinematics in dilepton sample– Single top

• 9 analyses in godparent publication review– Top pair cross-sections

• Soft muon b-tag• tau dilepton• Methods combination

– W helicity– BR(t Wb) / BR(t Wq)– Top mass (162 pb-1)

• Dynamic Likelihood (lepton+jets)• Multivariate (lepton+jets)• Template (lepton+jets)• dilepton


Electroweak and QCD Physics

• EWK: 7 paper submitted– W, Z cross section in e, channel (72 pb-1) – PRL– WW cross section in dilepton channel (197 pb-1) - PRL– Forward-backward asymmetry in Z/ e+e- (72 pb-1) - PRD – WZ+ZZ cross section limit (197 pb-1) – W charge asymmetry (170 pb-1)– W, Z cross section e, channel (202 pb-1)– W, Z cross section e, µ channel (72 pb-1), PRD

• EWK: 1 analyses in godparent publication review– W mass (200 pb-1)

• QCD: 2 papers submitted– Jet shapes/energy flow using the MidPoint Algorithm (170

pb-1)– Diphoton cross section

• QCD: 2 papers under review – b-jet cross section – Jet cross secion (cone)


Higgs and New Phenomena

• 6 papers published or submitted– Bd, Bs µµ (PRL)– Search for H++ ee, µµ, eµ (PRL)– Stable H++ (PRL)– Search for 1st and 2nd generation leptoquarks (PRL)– e* ePRL)– Diphoton + missing ET cross section

• 14 analyses in godparent publication review– Search for Z’ ee, µµ– Search for leptoquarks in missing ET

– WH standard model cross section limit– H diboson cross section limit– Magnetic monopole search– Search for sbottom from gluino decay– Search for W’ e– WH lnbb– High Mass pair– Higgs decaying in pair– Stop charm + LSP– High Mass sds– Charged Higgs In Top decay– Bd, Bs µµ (360 pb-1)


• Speed up SVT execution– cope with high lumi– reduce dead-time– extra features

• forward muon/electron trigger• increase coverage e.g. beam spot

• How to do that?– more powerful Associative Memory (32k --> 512k

patterns)• Improve pattern recognition resolution

– Reduce number of roads to fit

– Replace AMS, RW, HB, TF with Pulsar boards• Support 512k pattern/wedge• Faster track fitting

SVT updrade details

back


TsukubaChicagoFermilab

Chicago

Pisa


• Fermilab goal was to install during the shutdown

• Shutdown postponed to October (at least)

• Planning to install 128kpatterns per wedge by June/July

• Hopefully install also new TF

• Take advantage, as soon as possible, of

• better AM resolution

• RW function moved before HB

• faster TF

Installation Plan


RW+TF: F>50s = 21%

M.Rescigno - Riunione CSNI 16 Maggio 2005 back


Run I Jet Results

Run I data compared to pQCD NLO

Observed deviation in tail …….. was this a sign of new physics ?

7.0 || 1.0 jet

TeV 8.1s

back


Jet Production with KT

• Inclusive KT algorithm

•Good agreement Data vs Theory•High-Pt tail to be watched

closely…

•KT works in hadron collisions !

relevant for LHC strategies

2

2,2

,2 ),min(

DR

PPd jTiTij

2, )( iTi Pd

NLO not corrected for Hadronization & Underlying Event (this will be important at low Pt)


Run II -> kT algorithm

1. For each object i with PTi define dii =(PT

i)2

2. For each pair of objects i, j define:

3. If the min of all dii and dij is dij, i and j are combined; otherwise i is defined as a jet

4. Continue until all objects are combined into jets

2

2,2

,2 ),min(

DR

PPd jTiTij

∆R2=(∆φij)2 + (∆ηij)2 ;

• particles with overlapping clusters are unambiguously assigned to jets (no merging/spitting problems)

• same jet definition at the parton and detector level

• difficulties in the definition of the underlying event

back


I.P.B

Secondary Vertex tagging: tracks with significant IP are used in a iterative fit to identify the secondary vertex inside the jet

For double tag searches,efficiency factors get squared! To retain signal, we need to have loose and tight tagging options

Soft lepton tagging SECondary VerTeX tagging Jet Probability tagging

Tagging Algorithms:

Efficiency drops at low jet Et and high rapidity but is 45-50% for central b-jets from Higgs decayMistag rates are kept typically at 4-5%

B-tagging performance


Search for WH in Run 2WH →lνbb is a promising channel for CDF to isolate the H→bb decay.

Initial data sample: inclusive lepton triggers, 162 pb-1

Basic Selection: e/µ (20 GeV), missing ET + 2 (15 GeV and || < 2) jets (one b-tagged) i.e. W+2jets signature

Main background: QCD and W+jets production, top

Top veto: no extra jets with ET > 8 GeV, veto on isolated 20 GeV track with opposite charge wrt the lepton

Non top bckg enter the signal sample when either a b-jet is tagged or light quark jet is mis-identified as heavy flavour jet by the tagging algorithm.

W+bb/cc bkg is estimated via ALPGEN MCNon W bkg: i.e. events w/ mis-identified lepton

Obs 62 evts

Exp 66.5±9.0

Low Mass

back


More Higgs

RUN 1 Run II


Jet energy measurement

needed to say something on Higgs before LHC

BASEDESIGN

Lu

m (

fb-1)

10 %

• Combine Calorimeter and tracking info

• b-jet correction from Zbb study

• Additional correction bring di-jet resolution on MC close to 10%


W syst plotsback


Top Backgrounds• W+heavy flavor jets(bb,cc,c)

– Heavy flavor fraction from MC– Normalized to data

• W+jets(mistag)– Use measured mistag rate, applied

to the data

• Multijet:fake-W (jete, track)– Estimated from data

• Single top, diboson (WW,WZ)– Estimated from MC

2tag 1tagT 1tagL 0tag 2 tag J+S

bkgds 0.7+-0.2 7.6+-1.2 10.2+-1.7 no est 1.2 +-0.6

Data 16 57 25 40 18

>=1-btag

controlsignal

Not

use

d

here

back



Expected error

mt dal fit 2-d

2tag 1tagT 1tagL 0tag

bkgds 0.7+-0.2 7.6+-1.2 10.2+-1.7 no est

Data 16 57 25 40

Bkg details


)stat(10.0JES 78.0

80.0

Expected error

Scala dei Jet dal fit 2-d


Systematic TMT 2-D TMT 1-D

Mtop (GeV)Mtop (GeV) JES()

JES (2.5 ) - 3.1

b-jet modeling 0.6 0.25 0.6

ISR 0.4 0.08 0.4

FSR 0.6 0.06 0.4

PDFs 0.3 0.04 0.4

Generators 0.2 0.15 0.3

Bkgd shape 1.1 0.17 1.0

b-tagging 0.1 0.01 0.2

MC statistics 0.3 0.04 0.4

Method 0.5 0.02 -

TOTAL 1.7 0.36 3.4 = 3.1 1.4

Sistematica Mtop

back


qq -> tt vs

How to control ISR? In Run I, switch ISR on/off using PYTHIA, Mtop = 1.3GeV In Run II: systematic approach

ISR/FSR effects are governed by DGALP evolution eq.:<Pt> of the DY(ll) as a function of Q2

(2Mt)2

log(M2)

ISR syst: 0.4 GeV

Pt(tt) at generator

+

-

back


Run I & II misure precedenti Consistency among different

channels? Are we looking for same top? Non-SM decays make different (like t->bH+)

All of previous RunII measurements haven’t reached RunI precision (Jet energy scale syst.)

RunII goal mtop is about 2 GeV

Mixing back-up


Hadronic Bs signals (2)

)(0 Sss DDB)( 0*0 KKDDB Sss

NBS = 254±21 NBS

= 116±18


Semileptonic Bs Signals (2)

)( 0*0 KKDlDB Sss )(0 Sss DlDB

1573±88 events 1750±83 eventsback


Lifetime in the semileptonic Bs modes

c = 455.9 11.9 m c = 422.6 25.7 m c = 413.8 20.1 m

Combined ℓ-Ds lifetime result: 445.0 9.5 m (W.A.: 438 17 m)

statistical err .only, NOT for Averages (DØ ’05: 426 13 17 m)

Real Ds backgrounds: prompt and physics


B0 mixing and dilution scaling• Validation of the flavor tag calibration using B0 and B+ sample – B0 D, B+ D0– B0 J/K*0, B+ J/K

• Event by event predicted dilution Dfrom the flavor tag calibration

•Fit the “Dilution scale factor” S– =1 if the tag calibration is correct.– 5 scale factors for 5 tag types

•Effective Dilution depend on detail of the samples (e.g. Pt spectra)

Scale factors are then used for Bs mixing analysis for hadronic channelsSame thing for semileptonic decays

DSeB

tmDSeBt

dt

1:

)cos(1:/

/0

B0 all Tags

B+ all Tags


B0 mixing results

• md consistent with WA: 0.510±0.005 ps-1

• Total D2: 1.1—1.4%• All dilution scale factors consistent with 1– Hadronic: 15~25% uncertainty– Semileptonic: 5~15% uncertainty

HADRONIC SEMILEPTONIC

md (0.503±0.063±0.015) ps-1

(0.498±0.028±0.015) ps-1

Total D2 (1.12±0.23)% (1.43±0.09)%

Dilution scale

SMuon 0.83±0.10±0.03 0.93±0.04±0.03

Electron 0.79±0.14±0.04 0.98±0.06±0.03

Vertex 0.78±0.19±0.05 0.97±0.06±0.04

Track 0.76±0.21±0.03 0.90±0.08±0.05

Jets 1.35±0.26±0.02 1.08±0.09±0.09


HadronicSemileptonic

Systematic Uncertainties

•Physics background at low ms

•Prompt background at high ms

•Dilution scale factors and templatessystematic limited from control samplestatistics

**Systematic errors are negligible with respect to statistical in both cases**

back


Other channels, example

•13323 Bs candidates

•Already used for lifetime

•But not for mixing

•20% statistics

ss DB0

example


c resolution improvements

• No EbE/L00: ~ 67 fs

• With EbE/L00: ~ 47 fs– 30%

improvement

• Not fully exploited yet (only L00)

back


Is MC describing the data?

One possible way to solve the issue of having a prediction for theSSKT dilution is to extract it from MC.Compare DATA with Pythia b-antib production and hadronization with allthe processes on, underlying event “tune A” from HF x-sec. CDF data.

Look at the charged tracks in a cone of R=0.7 around the Bs (no PID)

# tracks Plongitudinal

First order good agreement


TOF: >1 K/π separation up to p=2 GeV

Basic tools: PID

dE/dx in COTK/π sep. >1.4@Pt>2GeV

pK

•Improved TOF calibration (better resolution)+ t0 (reduced tails)

•Improved COT dE/dx calibration over wider range

•J/ee, ee•J/mm•D*±D0 s(k) s

• p

Combine TOF+COT in a likelihood ratio usable for all momentum range!


Verso il 2009 – Bsmixing(II)

back


Verso il 2009 – Bsmixing

• Estrapolazione in forma analitica (riproduce attuale risultato con gli appropriati input)

• Si assume di integrare la meta’ della luminosita’ dal 2007 in poi (B-physics solo da meta’ store)

• Sensibilita’ al range favorito dal fit di unitarieta’• In case of no signal 95% C.L. up to 30 ps-1 with 4 fb-1 • Improvement all’analisi credibili ma (meno) labor-intensive….More proj

ections


Bd(s)hh’ penguin and tree

Amplitude ~ T

Tree

Amplitude ~ P

Penguin

ii

ii

edeCKK

deeC

2

2

2s

d

1

2/1)A(B

)A(B

; ddAmplitudes related by U-spin symmetry of strong interactions (sd interchange) !

C, C’ : CP conserving strong amplitudes

d, d’ : “penguin to tree ratio”

, ’ : strong phase difference between penguin and tree

Glossary


Bhh observablesMany related observables determine the angle using BsKK/Bd CDF data alone

Time dependent CP asymmetry requires b-flavor tagging and need more statistics

(a major goal for CDF Run II)

pssd

K

Fdd

dd

C

C

BR

KKBRR

dd

dd

KBR

BR

f

fH

2

2

21

22

21

22

2

2

d

s

2

21

22

21

2

2

d

d

2

2

2

coscos21

coscos21

)B(

)B(

coscos2

coscos21

)B(

)B(1

R.Fleisher hep-ph/0405091;

D.London, J.Matias hep-ph/0404009

Phase space factor = 0.92QCD sum rules: 1.76+0.15-

0.17 (A.Khodyamirian et al., Phys.Rev D68 114007)

Branching Ratio measurements can constrain theory too!


Current single best measurement(BaBar)

Scaling from current yields

Bhh verso il 2009

Stime non aggiorn

ate


lepton+track triggered dataset 195 pb-1Signal consists in a tau pair (had, tau → e/µ) Hadronic taus appears as narrow jets that are reconstructeded by using both tracking and calorimetric quantities.

Signal and isolation cone are used to select good candidates.

The production x-sec of the CP-odd A scale as tan2

While in general gg→Abb (A →bb) is promising, gg→A is difficult to study when A → bb.The addition of the tau tau decay mode expand the CDF reach.

Search for MSSM A→tau tau


Search for MSSM A→ MSSM

The candidates sample has significant contamination from quark and gluon jets.

Tau visible products and missing ET directions are used to separate signal from W+jets bkg

Z → is the large source of background, can only be distinguished by partial mass distribution mvis(lepton, tau, missing ET)

230 evts. obs. 263.630.1exp.


Verso il 2009 – SUSY Higgs

• 1) Estrapolando l’attuale analisi D0 (4 bjet)• 2) Estrapolando l’attuale analisi CDF direct production A in • Sensitivita’ a nuova fisica significativamente estese con

maggiore luminosita’


Charginos & Neutralinos

• mSUGRA– Neutralino is LSP

• Look 3 leptons + Missing Et

• GMSB– Gravitino is LSP– Neutralino (NLSP)

gravitino + • Look for + MET + X

back


Tri-lepton search • New D0 limit (model

dependent): ± > 116 GeV – 3l - max ± > 128 GeV – Heavy

Squarks• Better than LEP in some

scenarios• CDF (run II) limit close to

being complete


+ MET searches• Sensitive to 0

1 G– CDF limit: ±

1 > 168 GeV@ 95% CL

– D0 limit: 195 GeV– Combination: 209 GeV (New)

~~~

~


SUSY Tri-lepton