The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1...
Transcript of The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1...
![Page 1: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/1.jpg)
H.Evans OSU Seminar - 10-Apr-02 1
Plotting the Downfallof the Standard Model
at DØ
Plotting the Downfallof the Standard Model
at DØHal Evans Columbia University
1. Sweeping Generalizations (broad goals of HEP)
2. Fermilab & the Tevatron (physics in the prairie)
3. The DØ Experiment (status & schemes)Run II has started! (we haven’t found the Higgs…) yet
![Page 2: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/2.jpg)
H.Evans OSU Seminar - 10-Apr-02 2
What do We Know?What do We Know?
Point-Like Particles: Fermions Fundamental Forces: Bosons
mf2>113H0E-W Sym
10-1 (MZ)0gStrong91.1882Z0
10-580.427W±Weak10-20γE-M10-390GGravity
StrengthMass[GeV]
BosonForce
4.41503–9-1/3bsd
17430013001–5 +2/3tcu
Quarks
Leptons
17771050.5-1τµe
υµ O(<eV)0υτυe
Mass[MeV]
Chg[e]
Particle
![Page 3: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/3.jpg)
H.Evans OSU Seminar - 10-Apr-02 3
What’s it all about?What’s it all about?The broad goal of HEP
measure something at odds w/ an SM prediction
⇒ hints of what lies beyond
If it ain’t broke – fix it!1. Has 19 arbitrary parameters2. Higgs Mass not stable to
radiative corrections∗
∗ Λ ~ Mplanck for no new physics∗ Mh < 800 GeV ⇒ tuning to 10-16
3. Why’s? of EW Symmetry Breaking
4. What about Gravity?∗ Why Mpl(1018GeV)»MEW(250GeV)?
222
20
2
4~ hhh MMM δ
πλ
+Λ+
![Page 4: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/4.jpg)
H.Evans OSU Seminar - 10-Apr-02 4
Where do we look?Where do we look?Concentrate on areas where
we don’t have complete understanding measurements are few
1. Why is there Mass? EW Symmetry Breakinga. direct searches for Higgs / new particles
∗ need highest possible energy (or lowest)b. precision measurements of EW param’s
∗ sensitivity to H.O. effects from Higgs/New Physc. effects in rare processes
∗ New Phys couples to mass ⇒ t-,b-decays2. Where’s the Antimatter? Weak vs. Mass Eigenstates
a. Quarks ⇒ Mixing, CP Violation,…∗ B0, K0 decays
b. Leptons ⇒ Neutrino Oscillations∗ neutrino mass, mixing & CP
3. What about Matter? Strong Interactionsa. Perturbative vs. Non-perturb.
![Page 5: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/5.jpg)
H.Evans OSU Seminar - 10-Apr-02 5
Stalking the HiggsStalking the Higgs
fit)(EW GeV 85 mfit)(EW GeV 196 m
(direct)GeV 114.3m
5434-H
H
H
+=
<>
LEP EW-WG: Winter 02 – Preliminary
![Page 6: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/6.jpg)
H.Evans OSU Seminar - 10-Apr-02 6
And Beyond ?And Beyond ?There are lots of Ideas…• Dynamical Symmetry Breaking
Technicolor: ∗ running, walking, limping…
• Supersymmetry (SUSY) GMSSM, SUGRA, R-Parity
Violating• Large Extra Dimensions
testable string theory!
f−1(k2)
f1(k1)
KK f−2(q2)
f2(q1)
(a)
f−1(k2)
f1(k1)
KK V2(q2)
V1(q1)
(b) pp →ff pp → VV
• monojets
• single VB
• f,VB-pairs
SuperpartnersStandard Model
½1½0½10½0½0½SSparticleSParticle
RL q,q
RL ,ll
Lν
γ± ,Z,W 0
±H,A,H,h 000
g
RL q~,q~
RL~,~ ll
L~ν
±± χχ 21~,~
04
03
02
01
~,~,~,~ χχχχ
g~
MSSM: M(h) < 135 GeV !!!
They all answer some questions• Look like the SM at low E• Differences only show up at
high Energy small corr’s to SM predictions• etc., etc., etc….
![Page 7: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/7.jpg)
H.Evans OSU Seminar - 10-Apr-02 7
Quarks are all mixed up !Quarks are all mixed up !Unitarity of VCKM ⇒ 12 eqn’s
the Unitarity Triangle is oneQuark Weak ≠ Mass Eigenstates
CKM Mixing Matrix
Independent param’s∗ 3 angles∗ 1 complex phase ⇒ CP-viol
Some Consequences
CP violation in K0, B0 systs
=
bsd
VVVVVVVVV
'b's'd
tbtstd
cbcscd
ubusud
mixing KK & BB 0000 −−
0=++ *tdtb
*cdcb
*udub VVVVVV
(0,1)
γ β
α
(0,0)
(ρ,η)
− *
ubud
*tbtd
VVVVarg
*cbcd
*tbtd
VVVV
− *
tbtd
*cbcd
VVVVarg
− *
cbcd
*ubud
VVVVarg
*cbcd
*ubud
VVVV
![Page 8: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/8.jpg)
H.Evans OSU Seminar - 10-Apr-02 8
Sorting it OutSorting it Out• Many measurements
constrain CKM param’s but no real test of whether
CP-violation is described by SM or not
• Two Possibilities1. all angle/sides consistent w/
a triangle∗ Hooray for the SM !
2. no triangle fits all meas’s∗ New Physics !
• Why expect New Phys here? many beyond SM models
have additional CP-violation matter – antimatter asym not
consistent w/ SM CP
-0.6 -0.4 -0.2 0 0.2 0.4 0.6ρ
0.8
0.6
0.4
0.2
η
βγ
fromV V
ub
cb
from ε
Excluded byB mixings
m = 175±5 GeVt
from B mixingd
αAllowed
X)(B ν→ l
)(B −+ππ→
mixing)(B
)KJ/(B 0ψ→K)D ,hh(B s−+→
![Page 9: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/9.jpg)
H.Evans OSU Seminar - 10-Apr-02 9
p-pbar Collisions: the Tevatronp-pbar Collisions: the TevatronThe Tevatron
world’s highest E accel. ~4 miles circumference >1000 supercond magnets
Run I Successes t-quark (1995) W-Mass Searches …
Upgrade Main Injector 1999 pbar Recycler Run 2b Start Mar 2001
4.82.32.5Int’s/X’ing1520.125fb-1Tot Lumi10517.33.2pb-1Lumi/week
196019601800[GeV]E-CM5.20.860.016[cm-2s-1]
(x1032)Typ. Lumi.
1323963500[ns]Spacing140x10336x366x6Bunches11
IIb05-08…
1.10.3(x1012)Tot. Anti-p
IIa01-04
Ib92-96
![Page 10: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/10.jpg)
H.Evans OSU Seminar - 10-Apr-02 10
Collisions at the TevatronCollisions at the TevatronUnderlying
Event
u
u
d
gq
q u
u
d
Hard Scatterproton anti-proton
Advantages (re e+e-)• High Energy• Hard Scatter is QCD
Disadvantages (re e+e-)• Don’t know what’s colliding• Underlying Event• Hard Scatter is QCD
![Page 11: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/11.jpg)
H.Evans OSU Seminar - 10-Apr-02 11
DØ CollaborationDØ Collaboration
>600 People 18 Countries
![Page 12: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/12.jpg)
H.Evans OSU Seminar - 10-Apr-02 12
DØ Run II UpgradeDØ Run II Upgrade
• Old Strengths: Calorimeter, Central Muons• New Features: Magnetic Tracking, Silicon, Forward Muon,
3-Level Trigger, DAQ, Electronics
![Page 13: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/13.jpg)
H.Evans OSU Seminar - 10-Apr-02 13
What We WantWhat We Want
1627—MeVMass res (J/→µµ)
1.6-10.7(Si) ; <132(COT)2.8-10.0(Si) ; <52(CFT)3.7-75cmRadii
Muon
Calo
Tracking
—18 ⊕0.3p%δP/P5.5-20beam shielding12-18λIShield
80% (cen)increase scint90%ϕ cover<1.5<2.0<3.6η accept
80/√E80/√E%Jet res16/√E14/√E%EM res
0.1×0.260.1×0.1∆η×∆ϕ
<3.6<4.0η acceptdE/dx,TOFPreShowerPID
14(rϕ) ; 50(rz)40(rϕ) ; 80(rz)—µmSec Vtx10-35(rϕ)15-30(rϕ)µmPrim Vtx6⊕22/pt13⊕50/pt—µmImp par
0.7⊕0.1pt2⊕0.2pt—%δPT/PT
<2.0(Si) ; <1.0(COT)<3.0(Si) ; <1.7 (CFT)<3.0η acceptT 1.42.00Field
CDF – Run II DØ – Run IIDØ – Run I
![Page 14: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/14.jpg)
H.Evans OSU Seminar - 10-Apr-02 14
What We Have!What We Have!
![Page 15: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/15.jpg)
H.Evans OSU Seminar - 10-Apr-02 15
Silicon Microstrip TrackerSilicon Microstrip Tracker~ 2.4 m
F-disks: 95.8% operational
SMT half cylinder
p-side pulse-height
1 MIP ≈ 4 fC ≈ 25 ADC counts
S/N > 10Efficiency 93-96%
Silicon Parameters 793k Channels 6 Barrels
+ 12 F-Disks+ 4 H-Disks
Coverage |η| < 3 3D Track Reco L2 Trigger
100% commissionedBarrels: 95.2% operational
H-disks: 86.5% operational
![Page 16: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/16.jpg)
H.Evans OSU Seminar - 10-Apr-02 16
Silicon trackingSilicon trackingDistance of closest approach (cm)
Primary Vertex with SMT Tracking
Barrels+ disks
Barrelsonly Work in progress:
Integrating disks into tracking
![Page 17: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/17.jpg)
H.Evans OSU Seminar - 10-Apr-02 17
Central Fiber TrackerCentral Fiber TrackerCFT Parameters
8 Layers axial/stereo fibers∗ 20 < r < 51 cm
77k Channels Readout by VLPCs
∗ 9K operating temp∗ 85% Q.E. – excellent S/N
L1 Trigger Pickoff
1 MIP~ 8 PE
ExcellentS/N
VLPC
Fiber Tracker
Axial: 100% readout Stereo: 52% readoutFully commissioned by mid-April
![Page 18: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/18.jpg)
H.Evans OSU Seminar - 10-Apr-02 18
Track reconstructionTrack reconstruction
DCA: Distance ofClosest Approach
track
x
y“Global tracks”
SMT → CFTand
CFT → SMT
pT>3 GeV
60 µm
DCA resolution ~ 60 µm (without alignment!)beam spot ~ 30-40 µm
![Page 19: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/19.jpg)
H.Evans OSU Seminar - 10-Apr-02 19
Central
Solenoid
Central PS
Tracking
Forward PS
CalorimetersForward
Calorimeter
PreshowerPreshowerPreshower Parameters
Triangular Scint. Fibers∗ Axial & Stereo
Coverage: |η| < 2.5 e-Trig Bgrd Rej: x 2–5
Forward PSSolenoid
Tracking Detectors: InstalledReadout: waiting for tracker electr’s
![Page 20: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/20.jpg)
H.Evans OSU Seminar - 10-Apr-02 20
CalorimeterCalorimetercentral
calorimeter
south endcalorimeter
Calorimeter Parameters Uranium – LAr (stable, rad-hard)
Coverage: |η| < 4.2 (hermetic)
Granularity: ∆η×∆φ = 0.1×0.1 E-Res
∗ EM: 14%/√E ⊕ <1%∗ Jet: 80%/√E
Compensating: e/π ~ 1
eta
3.7
0.0
-3.7
-1.2
1.2
phi
0.0
2PI
ET GeV
140
Bins: 847Mean: 0.754Rms: 6.03Min: 0.00283Max: 136
E_t: 0.00878phi_t: 172deg
Run 132568 Event 444821 Wed Nov 14 08:57:20 2001
ηφ
3-jet eventET
jet1 ~ 310GeVET
jet2 ~ 240GeVET
jet3 ~ 110GeVMissing ET ~ 8GeV
100% commissioned~55K readout channels
~0.1% dead/noisy
![Page 21: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/21.jpg)
H.Evans OSU Seminar - 10-Apr-02 21
Calorimeter performanceCalorimeter performance
• Missing ET important for New Physics SUSY, extra dimensions…
• MET Resolution from Data Inclusive di-electron sample ≥1 Track Match (Z, DY…)
Z → ee sampleno track match
Yellow = dataBlue = MC
, GeVTMissing E0 5 10 15 20 25 30 35 40 45 50
Ev
en
ts
02468
10121416182022
, correctedTME
Nent = 71 Mean = 8.43RMS = 4.61Under = 0Over = 0Chi2 / ndf = 6.694 / 6Prob = 0.35
0.6297 ±N = 3.763 0.4059 ±Sigma = 6.849
, GeVTMissing E0 5 10 15 20 25 30 35 40 45 50
Even
ts
02468
10121416182022
DØ Run 2 Preliminary
, correctedTME
Nent = 71 Mean = 8.43RMS = 4.61Under = 0Over = 0Chi2 / ndf = 6.694 / 6Prob = 0.35
0.6297 ±N = 3.763 0.4059 ±Sigma = 6.849
GeV 7~)E( T/σ
DØ Run 2 Preliminary
Snapshot of present performance
• EM energy scale from Z→e+e-
EM resolution modeled well by Monte Carlo
![Page 22: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/22.jpg)
H.Evans OSU Seminar - 10-Apr-02 22
Muon SystemMuon SystemTrigger Scint (A-φ)
ScintPixels
Bottom B/C Scint
MDTs (Iarocci)
Shielding
Toroids
Muon Parameters Coverage: |η| < 2.0 Rough standalone P-meas Cosmic Rejection
∗ Added shielding∗ Time Resolution: 2.5 ns
PDTs(Run I)
Muon system 100% commissioned
![Page 23: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/23.jpg)
H.Evans OSU Seminar - 10-Apr-02 23
Muon PerformanceMuon Performance
View 3, Plan (X-Z)
x
y z
Run 139930 Event 239390 Tue Feb 26 08:25:34 2002
CFT tracks match tomuon system
Z→µ+µ- CandidateM(µµ) ~ 103 GeV
Mini Drift TubesEff > 98%
![Page 24: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/24.jpg)
H.Evans OSU Seminar - 10-Apr-02 24
Trigger HappyTrigger Happy
7.5 MHz(132 ns)
Beam X’ing
*m(H)=100 GeV56%22%
7 / day425 fb44%→only jets35%→e/µ + jets
~100%5 / hour7.2 pb0.2 Hz1 nb4.4 Hz22 nb10 kHz50 µb10 MHz50 mb
Rate(L=2x1032)
X-Sector BR
Process Conclusion: too much Physics!
L14.2 µs
(128 terms)
L2100 µs
(128 terms)
L350 ms
(48 nodes)
7 MHz• Single Sub-Det’s
• Towers, Tracks,ET-miss
• Some correl’s
• Not deadtimeless
• Correlations
• Calibrated Data
• Physics Objects e,µ,j,τ,ET-miss
• Simple Reco
• Physics Algo’s
5 kHz
1 kHz
50 Hz
F’work
Data
pp Inelastic)( bbpp 1y <→
WXpp →XbbZXpp →→
ttpp →
bbWW -+→
H(*) W/Zpp →bb e/ +µ
bb qq +
![Page 25: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/25.jpg)
H.Evans OSU Seminar - 10-Apr-02 25
DØ L1 & L2 TriggersDØ L1 & L2 Triggers
CAL
c/f PS
CFT
SMT
MU
FPD
L1Cal
L1PS
L1CTT
L1Mu
L1FPD
L2Cal
L2PS
L2CTT
L2STT
L2Mu
Global L2Framework
Detector
Lumi
Level 1 Level 27 Mhz 5 khz 1 khz
Level 3
![Page 26: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/26.jpg)
H.Evans OSU Seminar - 10-Apr-02 26
Trigger SystemsTrigger Systems
Rate
(H
z)
Luminosity (1030 cm-2s-1)
central
forward
Mu L1 rate vs. lumi
• Level-1 Calorimeter, Muon working Track ~May
• Level-2 Rejecting events ~now Silicon Track Trig summer
• Level-3 Linux Farm working
• DAQ → Ethernet/SBC Full system summer
Highest Et Central Jet Transverse Energy (GeV)0 50 100 150 200 250 300
0
0.2
0.4
0.6
0.8
1
JT_MX 2C Turn On Curve Using ‘‘L3MarkPass’’
L3 Jet turn-on
[GeV]Tp0 20 40 60 80 100 120 140 160 180 200
Data
/T
0
100
200
300
400
500| < 0.7η |
JT_LO30L1 Jet turn-on
![Page 27: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/27.jpg)
H.Evans OSU Seminar - 10-Apr-02 27
some Run II Physicssome Run II Physics
25%Single top3%Vtb
3%Pol(t→bWo)~180 GeV *>114 GeVSM Higgsn
ew
300 GeV>270 GeVsquark/gluino1 TeV>700 GeVW’ / Z’0.030.82±0.08CP (sin 2β)B6%AFB(B→K*µ+µ-)
20-30>22Bs Mixing (xs)
10%5.6 ±1.8 pb<2 GeV174.3±5.1 GeVM(t)T
op
Anom CouplingsM(W)Topic
<0.1<0.3 – 0.5<0.040 GeV80.427±0.046 GeVE
W
Run II Sens. (2 fb-1 / *20 fb-1)Now (World Ave)
)ttpp( →σ
![Page 28: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/28.jpg)
H.Evans OSU Seminar - 10-Apr-02 28
Physics Galore!Physics Galore!• Run II Tevatron Working Groups
http://www-theory.fnal.gov• Publications
Higgs hep-ph/0010338 SUGRA hep-ph/0003154 BTMSSM hep-ph/0006162 RPV hep-ph/9906224 GM SUSY hep-ph/0008070 Electroweak Fermilab-PUB-00/297 Top see web (above) B hep-ph/0201071
![Page 29: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/29.jpg)
H.Evans OSU Seminar - 10-Apr-02 29
Taking What We GetTaking What We GetNo single limit to Tev lumi
~8 contributing items p bunch intensity, pbar
xfer eff., etc. Will be improved over next
12 months
Delivered Luminosity
2002 Projections
DØ Roll-InRun 2 Start
1st Collisions
Detector Commissioning, timing, improve electronics, DAQ, offline
Instrument Fiber Tracker
Data Shown Here
![Page 30: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/30.jpg)
H.Evans OSU Seminar - 10-Apr-02 30
ElectroweakElectroweak
Z→ee selection
SMT+CFT Global tracks
Z→ee candidatemee = 93.2 GeV
W→eν candidatesET(cluster)/PT(track)≥1 Track-Clust Match
W & Z X-Sect’sConsist. w/ expect
W MTvs MC
![Page 31: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/31.jpg)
H.Evans OSU Seminar - 10-Apr-02 31
eta
3.7
0.0
-3.7
-1.2
1.2
phi
0.0
2PI
ET GeV
70
Run 141155 Event 154798 Thu Feb 28 01:44:52 2002
Electron
MET
j1 j2j3
j4
Top: W + 4 JetsTop: W + 4 Jets
eta
3.7
0.0
-3.7
-1.2
1.2
phi
0.0
2PI
ET GeV
35
Run 142344 Event 1669603 Thu Feb 28 01:42:39 2002
ElectronMET
j1
j2
j3
j4
ET = 26GeVη = 1.83ϕ = 2.90
j4ET = 35 GeVη = 1.27ϕ = 2.29
j3
MET = 62 GeV, MT(e1+MET) = 156 GeV
j2j1e1ET = 57 GeVη = 0.69ϕ = 3.38
ET = 68 GeVη = 1.62ϕ = 6.03
ET = 99 GeVη = -0.53ϕ = 5.94trackmatch
ngle
ET = 20GeVη = -1.43ϕ = 4.60
j4ET = 21 GeVη = 0.52ϕ = 5.80
j3
MET = 30 GeV, MT(e1+MET) = 79 GeV
j2j1e1ET = 24 GeVη = 2.41ϕ = 1.62
ET = 28 GeVη = 0.73ϕ = 3.82
ET = 52 GeVη = -0.51ϕ = 1.63Track match
+ observe siction
p produto
![Page 32: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/32.jpg)
H.Evans OSU Seminar - 10-Apr-02 32
E-W ProjectionsE-W Projections
5.5%0.91 ± 0.39BR(t→Wob)(V-A check)
3 × 1065 × 1030t X / yr1071.4 × 104~100
<15%20%(|Vtb| to 12%)
<13.5< ± 2± 2.7 (1.6)174.3 ± 5.1Mt [GeV]
± 0.02-0.01± 0.010 (NLC)
± 0.03080.451 ±0.033
MW [GeV]
huge4.4 × 1071.5 × 104
(LEP2)W / yr
LHC (10 fb-1)DØ (2 fb-1)CurrentMeasRun II Projection
/ yrtt
tX)p(p →σ
![Page 33: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/33.jpg)
H.Evans OSU Seminar - 10-Apr-02 33
B PhysicsB Physics
Mean = 3.08 ± 0.04 GeVSigma = 0.78 ± 0.08 GeV
KS→π+π-: Si-only Tracking
J/ψ→µ+µ-: Mu-only Tracking
Muons + CFT
Very preli
minary!
Connect tracks
MuonSystem
standalone
![Page 34: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/34.jpg)
H.Evans OSU Seminar - 10-Apr-02 34
B cross sectionsB cross sections• X-Sect shape consist. w/ Run
1 results in same kin. reg.• PT of muon rel. to jet
Muon + jet cross section
~ 0.2 pb-1
Includes trigger, reconstruction andjet energy scale corrections
= evidence for b-quark contentbb di-muon candidate
pTrel = 1.25 GeV/c
pTrel = 1.01 GeV/c
![Page 35: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/35.jpg)
H.Evans OSU Seminar - 10-Apr-02 35
B-Physics ProjectionsB-Physics Projections
FB Asymm22007000B → K* µ+ µ-
*Λb → J/ψΛ± 0.11*1.23 ± 0.08τ(Λb) [ps]Bc → J/ψ l ν60020N(Bc)
3.3 ×104~11000N(Bd→K+K-)sin2α2.4 ×104~600~200N(Bd→π+π-)
*Bs → Ds l X>75~30*>22xs
B → J/ψ KoS± 0.02
(±0.06 BaBar)± 0.030.82 ± 0.08sin2β
in acceptComments
1.5×10116×10105×107 (BaBar)
BTeV (2 fb-1)DØ (2 fb-1)CurrentMeasurement / yrbb
Also watch for• b Production x-section & correlations• Bs → Ds K, J/ψ φ, …• Bd mixing• B-hadron properties: lifetimes, spectroscopy, polarization, Onia
![Page 36: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/36.jpg)
H.Evans OSU Seminar - 10-Apr-02 36
New Phenomena?New Phenomena?
EM
µ1
µ2
eµµ candidate event
Tri-Lepton(SUSY: χ+χ0)
+z
γγ - MET
(gauge med SUSY breaking)
MET =31.8 GeV
mµµ = 41.5 GeV
µ2µ1e
pT = 9.82η = -1.48ϕ = 2.88Charge = 1
pT = 28.2η = -0.10ϕ = 6.20Charge = -1
ET = 19.2 GeVη = 0.40ϕ = 0.63No trackmatch
MET = 34.3 GeV; M(diEM) = 53 GeV
EM2EM1
ET = 26.0 GeVη = 1.54ϕ = 5.86No track match
ET = 27.4 GeVη = 0.52ϕ = 3.78Loose trk match (low-pT)
![Page 37: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/37.jpg)
H.Evans OSU Seminar - 10-Apr-02 37
SearchesSearches
2000900-1200>500-600MZ’ [GeV]D–4 = 2–76–8 2.1–3.5>1.0–1.4LED: MS [TeV]
3%11%<45%t →b H+
10-5 in SUSY1 ×10-40.3%<3.2%t →q γ10-4 in SUSY2 ×10-42%<33%t →q Z
*mainly χχ~all180–280*> ~100 (LEP2)m1/2 [GeV]
h,H,Aallalmost all 5σexcl tanβ: 0.9-7.7 / 0.5-2.3
SUSY (tanβ,MA)
< 1000180 (3σ)>114.1MH [GeV]MH = 100 GeVComments
5 ×1049 ×10350 (Run I)W(Z)HSM
LHC (100 fb-1)DØ (20 fb-1)CurrentMeasurement
Also watch for (list limited by imagination)• SUSY particle zoo• Technicolor• Your favorite Beyond the SM theory
![Page 38: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/38.jpg)
H.Evans OSU Seminar - 10-Apr-02 38
The HiggsThe Higgs
1
10
10 2
102
103
mH (GeV)
Sig
nal s
igni
fica
nce
H → γ γ + WH, ttH (H → γ γ ) ttH (H → bb) H → ZZ(*) → 4 l
H → ZZ → llνν H → WW → lνjj
H → WW(*) → lνlν
Total significance
5 σ
∫ L dt = 100 fb-1
(no K-factors)
ATLAS
LHC
5σ
100 GeV1000 GeV
• Can Probe M(h) < 180 GeV
• But… Need the Luminosity!
⇒ Run 2b !!!
![Page 39: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/39.jpg)
H.Evans OSU Seminar - 10-Apr-02 39
Upgrading the UpgradeUpgrading the Upgrade• Need >15 fb-1 to achieve
Higgs discovery potential• Tevatron Upgrade
Luminosity ∗ 1→5×1032 cm-2s-1
Beam Crossing Angle∗ Beam z-size: 25 →15 cm
Timescale: 2005• DØ Upgrade
Goal: minimize changes Replace Silicon
∗ Radiation damage to 2a det.∗ Use SS det’s back-to-back
Upgrade Trigger (esp L1)∗ L1 Rates >> 5 kHz limit∗ Track: tighter roads∗ Calorim: Dig. Filt + Cluster∗ Cal-Track Matching
Run2b Silicon
• 6 Layers
• r = 1.9-16.4 cm
• |η| < 2.0
• 925k channels
L1 rate (kHz)
0.3
0.5
0.5Upgr
10H→ττTrack Trigger2Trks (5,10GeV) + Iso + EM>2GeV
2ZH→ννbb
Jet Trigger2 H+EM towers Σ > 4GeV
9W→eνEM TriggerTower > 10 GeV
OldPhysTrigger
![Page 40: The D0 Experiment - nevis.columbia.eduevans/talks/osu02.pdf · H.Evans OSU Seminar - 10-Apr-02 1 Plotting the Downfall of the Standard Model ... Where’s the Antimatter? Weak vs.](https://reader031.fdocuments.us/reader031/viewer/2022030501/5aadfe587f8b9a5d0a8b8fac/html5/thumbnails/40.jpg)
H.Evans OSU Seminar - 10-Apr-02 40
ConclusionsConclusionsWhat can we conclude???
We’ve barely started!!!
DØ vs. The Standard Model Fightcard
etc…etc…etc…2–3.5 TeVLED
700 evtsK*µ+µ-×10–40rare top12%|Vtb|30xsmost 5σtanβ,MA1.6 GeVMt
0.0318030 MeV sin2βHSMMW
Quark M vs Weak (2 fb-1)Searches (20 fb-1)Precision (2 fb-1)