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April 2004 Ivo van Vulpen 1
MoriondCalor
LSPLSB
Ivo van Vulpen
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April 2004 Ivo van Vulpen 2
Introduction:
Moriond (Electroweak)
La Thuile
Calorimetry 2004
Perugia
Real ‘hardware’ conference.
Real ‘physics’ conference
Disclaimer:
Most of the sheets are taken directly from the talks given at Moriond.
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April 2004 Ivo van Vulpen 3
Small and very nice conference, but still: 90 talks !
EW results & precision measurements
Searches and SUSY
Dark matter
Large extra dimensions
Neutrinos
B-physics
Theory:
Experiment:
Discovery of new particles Discovery claim
What is happening
top quark mass, g-2, s in2(w)
Babar & Bell + frustrating sheet
Higgs at Tevatron
Penta-quarks
why and how can we seen it
TALK
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April 2004 Ivo van Vulpen 4
top quark
8 sheets
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April 2004 Ivo van Vulpen 5
Top quark production
(tt) 8 pb
gqq t
tWb
Wb
W->qq (2/3) and lv (1/3)
WWbb
production
Final states
bb qqqq
bb qqlv
bb lvlv Large QCD background
Di-lepton. small statistics
lepton + jets. Most sensitive
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April 2004 Ivo van Vulpen 6
Tevatron run 2: CDF
di-lepton
6 events (0.5 background)
Lepton + jets
22 events (6 background)
126/102 pb-
1
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April 2004 Ivo van Vulpen 7
Tevatron run 2: D0
“First we have something to say on our run 1 result.”
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April 2004 Ivo van Vulpen 8
New D0 analysis technique:
Tevatron run 1: D0
Use only 4 jet (clean) events (22 events instead of 77 previously) & all combinations
i i
ii
i ii m
nm
m1
of instead 1
1
m 2
2
Basically same as difference between:
Can it be so important ??
Compute event-by-event probabilityMatch measured 4-momenta to
expectations for signal (mtop = 170,175,180 etc) and background.
YES!!
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April 2004 Ivo van Vulpen 9
GeV (syst) 5.5(stat) 5.6173.3m top 91 events22 events
D0 l+jets (old)
GeV (syst) 3.9(stat) 3.6180.1m top (new)
As if you had 2.4 times more dataMtop moves up by 7
GeV !!!
Tevatron run 1: D0
Improvement in statistical error is roughly 1.5 (comparable to 2.4 times more data)
wow !!
SAME DATA
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April 2004 Ivo van Vulpen 10
New top quark mass averages
RUN2 (l+jets) GeV 6.2177.8m 4.55.0-top
GeV 4.3178.0m top
GeV 5.1174.3m top TEVATRON RUN1 (old)
RUN1 (new)Mtop moves up by +4.7 GeV
D0 lepton + jets
Influence on rest of EW physics results
Tevatron
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April 2004 Ivo van Vulpen 11
Another example: Influence new top mass on tan() exclusion region from LEP:
In MSSM benchmarks: mtop = 175 GeV
mh
LEP-excluded tan() region will shrink
mh-max benchmark scenario
FeynHiggs:
Computation of mh-max:
Loop corrections m4top
higher order corr. -> mh 3 GeV mtop 5 GeV -> mh 5
GeV
Maximum mh: in the MSSM 135 GeV
hZ
hA
Scenario mh mA Excluded tan()
Mh-max >91.0 >91.9 0.5 < tan() < 2.4
LEP
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April 2004 Ivo van Vulpen 12
Impact new top mass on the electroweak fit
Old (new): mh = 96 (117) GeV mh < 219 (251) GeV @ 95% CL
new
old
mh
)ln(2htM mm
W
Example: W mass. contributions from:
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April 2004 Ivo van Vulpen 13
Electroweak
g-2
4 sheets
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April 2004 Ivo van Vulpen 14
“Compare to SM prediction: there is a 1.4/2.7 sigma deviation”
Anomalous magnetic moment of the muon
g-2 collaboration final results
Depends on e+e- data or tau data
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April 2004 Ivo van Vulpen 15
Theoretical computation of a [ (g-2)/2] part (1)
(1) light by light scattering: theory!
Tedious work. Done by 1 guy basically.
Sign flip found in 2002 (PhD student from Marseille ??)
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April 2004 Ivo van Vulpen 16
(2) Hadronic vacuum polarization: experiment (2 ways to extract it)
Cannot be calculated
(1) CMD: e+e- results:
Claim 0.6% uncertainty, but new rad corr shifted cross section by 3%
Region < 1.8 GeV dominates
They were alone (check needed)
Now confirmed by KLOE (radiative events). Maybe BaBar and Cleo can do something as well
1
(2) Tau decay Gives different e+e- -> hadrons
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April 2004 Ivo van Vulpen 17
FINAL
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April 2004 Ivo van Vulpen 18
w2sin
Electroweak
4 sheets
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April 2004 Ivo van Vulpen 19
E = 48 GeV, Q2 = 0.03 GeV2
tree level: -3 •10-7
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April 2004 Ivo van Vulpen 20
Still the old NuTeV ‘discrepancy’
APV = -160 21 17
Significance of parity non-conservation is 6.3 sigma !!
Translate to sin2(w)
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April 2004 Ivo van Vulpen 21
clean events
neutrino–nucleus deep inelastic scattering
probe strange sea
hadronsnucleus
v and anti-v beam
Measure sin2 W through NC CC cross section ratio:
NuTeV:
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April 2004 Ivo van Vulpen 22
Extracting sin2(W) from DIS cross sections:
RwR 2sin2
1
More precise corrections:
(1) Z protons and N neutrons
(3) Fermi-motion and nucleair binding effects from target
(10 x experimental error)
(sin2(W)) = - 0.5 NuTeV (towards SM
value)
NuTeV shifts towards SM value (almost 1 sigma) !
Nuclear effects due to target corrections
(2) QCD radiative corrections
(sin2(W)) = - 0.5 NuTeV (towards SM
value)
new
new
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April 2004 Ivo van Vulpen 23
4 sheets
B-physics
Babar/Belle
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April 2004 Ivo van Vulpen 24
2 odd things
BABAR and Belle attacking the CKM matrix from all sides
CP violation in B0->+-
Belle B->Ks 3.5 deviation from SM
Do they agree on everything ??
Are there anomalies left ??
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April 2004 Ivo van Vulpen 25
Difference between J/Difference between J/KKss and and KKss
Bb
d
W
ss
sg
Kd
b
d
d
Wcc
s
0B /J
0K
NP contributions to B0 Ks penguin can result in
sin(2)J/Ks sin(2)Ks
B0 Ks penguin diagram
Babar : sin(2)J/Ks=0.730.06
: sin(2)Ks= 0.50.5
Belle : sin(2)Ks=-1.00.6
Jeroen van Hunen (NIKHEF)Belle B->Ks 3.5 deviation from SM
sin(2)
sin(2)
Old numbers
Diff !
asy
mm
etr
y
t decay time between tag-B and decay-B
SM exp
Measured
3.5
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April 2004 Ivo van Vulpen 26
CP violation in B0->+-
Fit asymmetry to: )sin()()cos()()( tmtStmtAtACP
No CP violation
Excluded at 5.2
time
time
SUMMARY (BABAR/Belle): doing well, some mysteries left.
For no B,B0 and B0 decays no CP –violation is observed (except Belle in B0->+-)
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April 2004 Ivo van Vulpen 27
Most frustrating slide in the conference !!
Quite a few talks on theoretical aspects of rare B decays as well.
D0
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April 2004 Ivo van Vulpen 28
Higgs
1 sheet
Tevatron running&
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April 2004 Ivo van Vulpen 29
Nothing new on the Higgs front & SUSY searches (updates from HERA, LEP, Tevatron)
Tevatron accelerator review:
4.4 fb-1 at FY 09 feasible
8.5 fb-1 at FY 09 very challenging
SM cross section
Excluded cross section
Tevatron operation
started bad, now ok
20042003
2002
Higgs cross section exclusion
Expected Higgs boson mass exclusion
Factor 50
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April 2004 Ivo van Vulpen 30
4 sheets
Penta-quarks
other new patricles
&
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April 2004 Ivo van Vulpen 31
New particle
‘New’ particles are discovered all the time:
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April 2004 Ivo van Vulpen 32
New particle
Could have seen it in Run1 I guess. Now studying decay properties. Seems like charmonium state.
charmonium
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April 2004 Ivo van Vulpen 33
K+n-invariant mass
Trying to understand the structure
Pentaquarks: + and --
Penta-quark
New particle
m+ 1542 5 1592 50
Exp. Theory (3+2)
m--
1862 5 1720 50
P-wave
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April 2004 Ivo van Vulpen 34
New particle
Penta-quark
A 3rd penta-quark ?? (NA49)
(1860)
Not confirmed by CDF
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April 2004 Ivo van Vulpen 35
5 sheets
Extra dimensions
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April 2004 Ivo van Vulpen 36
e.g. Randall-Sundrum Models
Apparently I was not the only one who was surprised !
prior reality
Many theory talks on this subject, a hot topic
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April 2004 Ivo van Vulpen 37
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April 2004 Ivo van Vulpen 38
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April 2004 Ivo van Vulpen 39
Tevatron (direct) and LEP (indirect)
Depend on size dimension(like harmonic oscillator
boundary conditions)
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April 2004 Ivo van Vulpen 40
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April 2004 Ivo van Vulpen 41
11 sheets
Dark matter
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April 2004 Ivo van Vulpen 42
Dark matter/energy
Dark matter halo around galaxies
What is dark matter ??AxionWIMP (SUSY stable LSP, 1
0)
matter > baryon --> Non baryonic dark
mattertotal > matter --> Dark Energy
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April 2004 Ivo van Vulpen 43
Assume WIMP = SUSY stable LSPDetecting WIMPS (1)
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April 2004 Ivo van Vulpen 44
Detecting WIMPS (2)
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April 2004 Ivo van Vulpen 45
WIMPS
Sensitive underground detectors, but need large (mass * exposure time)
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April 2004 Ivo van Vulpen 46
WIMPS
DAMA & Edelweiss
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April 2004 Ivo van Vulpen 47
DAMA at Moriond
WIMPS
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April 2004 Ivo van Vulpen 48
DAMA at MoriondDAMA at CALOR
Talks from DAMA 95% the same:
They see something !!
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April 2004 Ivo van Vulpen 49
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April 2004 Ivo van Vulpen 50
EDELWEISS-I (Frejus, inonization-heat measurement, small)
Plans: 10-6 pb (now), 10-8 (soon), 10-10 (10 years)
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April 2004 Ivo van Vulpen 51
Axions
8o, so shifts only at sunrise(set)
2005: Probe higher axion masses
Interact with magnetic field (B2L2) and produce X-rays (a-> )
L=10 m, B = 9T
100 times more a-> conversions
X ray telescope.
(fill magnet with helium)
can be produced in the sun.
LHC magnet than any other experiment
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April 2004 Ivo van Vulpen 52
Other underground experiments: proton decay
Explore lifetimes > 1035
yearsAmbitious:
100,000,000 kg liquid argon
74 sheets in 30 minutes
Rubbia
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April 2004 Ivo van Vulpen 53
7 sheet
Neutrinos
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April 2004 Ivo van Vulpen 54
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April 2004 Ivo van Vulpen 55
Mass eigenstates are mixture of flavour eigenstates (a la CKM matrix)
massPMNSflavour U ||
Atmospheric
Solar (KAMLAND)Reactor (CHOOZ)
If 13 0 --> CP-violation
2-3 mixing
1-3 mixing
1-2 mixing
massCKMflavour qUq ||
Superkamiokande
(m23)2 = 2-3 eV2 23
= 45o
(m13)2 = ?? (m12)2 = 5-7 eV2
How do we probe the neutrino sector of the SM:
MNS = Maki-Nakagawa-Sakata
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April 2004 Ivo van Vulpen 56
Super Kamiokande
Is disappearance really caused by oscillations ??
3.5sigma disfavored
2 allowed regions are compatible
Do they really oscillate ??
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April 2004 Ivo van Vulpen 57
KARMEN excludes part of it
(confirmation needed): --> miniBOONE
Close to 4 Are there 3 families ??
Sterile neutrinos
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April 2004 Ivo van Vulpen 58
miniBOONE energy spectrum requires more precise cross section data
miniBOONE will cross-check LSND result
Depends on Tevatron programme
Use identical targets at HARP
Sensitivity nmu->ne
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April 2004 Ivo van Vulpen 59
What about the absolute mass scale and hierarchy ??We only know mass differences squared (m2)
n -> p + e- + v
m3
m2m
1 ?m3
m1
m2
Lepton number violation
Neutrinoless double beta decay
Klapdor-Kleingrothaus
hep-ph/0201231
Radon down factor 10
NEMO:
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ciao
I will leave CERN on the 1st of June
NL
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April 2004 Ivo van Vulpen 61