Flavor Physics

Flavor PhysicsCKM Matrix

B PhysicsProductionNew StatesLifetimesBs MixingCP ViolationOther MeasurementsTop PhysicsProductionSpin CorrelationW PolarizationVtb

Quarks: Flavor ()CKM Matrix of Flavors: u,d,c,s,t,b()Wolfenstein RepresentationDifferent Processes give different elements

Vud

Vus

Vub

Vcd

Vcs

Vcb

Vtd

Vts

Vtb

1-2/2

A3(-i)

1-2/2-i A24

A2

A3(1--i)

-A2

1

FNAL CKM MeasurementsKTeV,KAMICKMB Physics Colliders?

CP violation in B decays(1,0)

B Physics: ProductionCentral RapiditiesRapidity Dependence

B Physics at the Tevatron

sbb 100 mb sbb 10-3 sp Bd0 , B- , Bs0 , Bc , Lb all produced

Two main trigger samples:J/y m+m-high pt leptons

To improve S/N:good mass resolutiondisplaced vertex cuts

SELECTED CDF RESULTSM(B- ) = 5279.1 1.7 1.4 Mev/c2 M(Bd0) = 5281.3 2.2 1.4 Mev/c2G(Bs0 ) = 1.36 0.09 0.06 ps G(Bs0 )/ G(Bd0 ) = 0.899 0.072Bc discoveryPrompt J/yJ/y from BsSide-band backgroundJ/y m+m- decay length

B Physics: Heavier StatesBc Observation

B_c Lifetime

B_c

B Physics: LifetimesNeutral and Charged very closeNote higher mass states Bs, Lb

Bd0 and Bs0 mixing

A(t) = = cos ( Dmqt)

reconstruct B-decaymeasure displaced vertextag B-flavor at production: Soft Lepton Tagging (SLT)Jet Charge Tagging (QJT) Same Side Tagging (SST) CDF has five independent Bd0 mixing measurements: Dmd = 0.481 0.028 0.027 ps-1CDF has also limits for Bs0 mixing: Dms > 5.8 ps-1 @ 95% CL from Bs0flnX Dms < 96 ps-1 @ 95% CL from Bs0Dsln DG/G anal.Vtb1VtdLike-sign mm asymmetry vs decay-lengthXq= Dmq/Gq Vtq

sin (2b) measurementACP(t) = = sin (2b) sin (Dmdt) f is J/y Ks0

Measured asymmetry: Amea(t) = DACP(t)

Use multiple B flavor tagging algorithms: SST SLT JCTeD2 (%) 1.80.5 0.910.15 0.780.14

0 < sin( 2b) < 1 @ 93% CL (Feldman-Cousin statistics)

Important Demo at least!!!N(t)(B0f ) - N (t)( B0 f )N(t)(B0 f ) + N (t)(B0 f )

RUNII : sin 2b

SIN(2b) FLAVOUR TAGGING eD2 CDF I CDF II CDFII +TOF SST(p) 1.8% 2.0% 2.0% JCT 0.8% 3.0% 3.0% SLT 0.9% 1.7% 1.7% KAON - - 2.4%

SIN(2b) SENSITIVITY

statistics of fully reconstructed B-decays is expected to increase by:

Run II luminosity sbb(s) increase Efficiency x Acceptance e+e- channel For 2fb-1 :

CDF II d(sin 2b) = 0.078 CDF II+TOF d(sin 2b) = 0.067D0 d(sin 2b) = 0.10

B Physics MeasurementsBs Mixing use states...20,000 Bs with SVT triggertagging using . xs Reach 40 - 60

B Physics: Other MeasurementsCP Violation in BsBs J/y f

sin 2a , sin 2g ( tough, need rate, id, space resolution)

Rare Decays

A Rich and Extensive Program in good part beyond the B Factory reachAsymmetry error vs. xs

Assuming BR(t Wb) = 100, the measured top quark pair-production cross section agrees well with the SM prediction. Top Quark Production Cross Section (D) tt= 5.9 1.7 pb(CDF) tt= 7.6 1.8 pb

New CDF top production cross section:6.4 pb.1.51.3(NEW!)

W Polarization in Top DecaySM predicts fraction of longitudinally polarized Ws from top decay: F0 = M2top/(Mtop2 + 2MW2) = 0.70

Extract W helicity fractions from the shape of thecharged lepton pT spectrum in t bW b better measured than angular correlations unaffected by reconstruction or combinatorics assume a mixtureof longitudinallypolarized andnegative helicityWs producedin top decay

use a maximumlikelihood methodto estimate F0(assume positivehelicity fractionF+ = 0) F0 = 0.97 0.37 0.12(assume F0 = 0.75) F+ = 0.11 0.15 0.06