Other Particle Searches at the Tevatron. Arnold Pompoš The University of Oklahoma For the CDF & DØ Collaborations. Štrbské Pleso. April 1418. DIS 2004. Slovakia. 2004. Outline. In this talk we report on. Search for Large Extra Dimensions (LED) in Monojet + MET channel
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Other Particle Searches at the Tevatron
Arnold Pompoš
The University of Oklahoma
For the CDF & DØ Collaborations
Štrbské Pleso
April 1418
DIS 2004
Slovakia
2004
In this talk we report on
For search for Higgs, SUSY and LQ see
S. Beauceron, T. Kurca & D. Ryan’s talks
Tevatron  pp collider

~ 290 pb1 on tape per experiment
data for physics
Feb 2002
April 2001
Jul 2002
first data for analyses
detector commissioning
New Phenomena Search Strategies
Both CDF & DZero start searches with
and then the searches are tuned for best sensitivity on
New Phenomena Search Challenges

Motivations for Extra Dimensions
V
g
q
g
g
q
g
Gkk
Gkk
Gkk
_
Gkk
g
Gkk
q
_
g
q
V
Possible real graviton emmission
Enable Graviton Mediated Processes
Monojet+MET event signature
Dilepton and diphoton event signature
After all selection cuts
Observe 63, Expect 100 with ~60% uncertainty
Search for Real Graviton Emission
q
g
g
g
_
Gkk
Gkk
g
q
Analysis sensitive to jet
energy scale (JES) uncertainty.
Data versus SM
heavy G escapes to extra D
large MET
recoil jet very energetic
Limit on Planck Scale Md
DØ ∫Ldt = 85 pb1
LEP
LED with ee & γγ  Theory
Search for enhanced dilepton production
Gravity effect parametrized byhG
ee, γγ
invariant
mass
scatter.
angle
Functions ofM & cosq*
determined by theory
LED with ee & γγ  Event Selection
DØ ∫Ldt = 200 pb1
700 million events 9400 + 6800 events selected
CentralCentral
CentralForward
Unprescaled, >99% efficient
due to high pT of EM objects
LED with ee & γγ  Data vs Background
Data
Data vs MC
Signal
prediction
QCD
SM
prediction
DØ ∫Ldt = 200 pb1
LED with ee & γγ  DØ Limits
*NLO k=1.3 scale applied to signal MC
DØ RunII
DØ RunI + Run II
hG95%= 1.17 TeV4
hG95%= 1.05 TeV4
λ = 1
λ = +1
* No NLO k factor applied to signal MC
LED with μμ  DØ
DØ ∫Ldt = 100 pb1
Observed events 3,000 events
No deviation from SM in data
Soon see results from 200pb1
LED with μμ  CDF
LED with KK modes of Z & Photon
is bilinearly in
same tools as LED
ηC = π2/3*M2PL(4+n dim)
and depends on dilepton mass and scattering angle
LED with KK modes of Z & Photon Limit
Data
SM
prediction
QCD
Signal
prediction
Observed 14200 events
DØ ∫Ldt = 200 pb1
Data vs MC
No deviation from SM in data
MC>1.12 TeV
Localized Gravity ( RS ) with ee
First direct
constraints
on RS
SSM : Z ’ couplings to fermions considered identical to the SM Z
E6 inspired models:E6 SU(3) x SU(2) x U(1)y x U(1) x U(1), Z ’ = Z sin + Zcos
Z if = 0
Zη if = tan1√(3/5)
Z if = π/2
ZI if = tan1(√(3/5))
Z’
DØ ∫Ldt = 200 pb1
Data
SM
prediction
Signal
prediction
QCD
Limits (in GeV)
SM Couplings
CDF : 750
DØ: 780
E6 ZI Zχ Zψ Zη
CDF: 570 610 625 650
DØ: 575 640 650 680
SM coupling
ZIZχZψZη
95% CL limit
Contact Interaction
M(e*)/Λ,
Λ is the compositness scale
Gauge Mediated Interaction
f/Λ,
f is the coupling to Z
In CDF ∫Ldt = 200 pb1 we
observed 3 events and expected 3 events
Calorimeter etaphi lego plot
Et(e1)=44 GeV
Et(e2)=42 GeV
Et(p1)=46 GeV
Et(p2)=26 GeV
MET=13 GeV
Central tracker