important communication talk - national...
TRANSCRIPT
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Fermilab Program Pier Oddone, Fermilab
NAS Board of Physics and Astronomy, 2009
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Outline
• State of the program and future evolution
Energy Frontier Cosmic Frontier Intensity Frontier
• Any other items the Board may want to discuss
P. Oddone, NAS Board on Physics and Astronomy2
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The particle physics program
• We are after a unified and coherent framework to understand the world around us
• We have a beautiful and powerful “Standard Model” that organizes what we know and allows us to recognize the phenomena in nature that do not fit
• Multiple experimental approaches are essential
P. Oddone, NAS Board on Physics and Astronomy3
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Three main thrusts
• The energy frontier: produce particles at highest energy
• The intensity frontier: the most particles for neutrinos and rare decays
• Cosmic frontier: study phenomena in nature
P. Oddone, NAS Board on Physics and Astronomy4
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Fermilab: facilities and experiments
P. Oddone, NAS Board on Physics and Astronomy5
TevatronLHC
LHCLHC upgrades
MinosMiniBooNE
NOvAMicroBooNEMINERvA
LHCCLIC orMuon Collider?
Now 2015
LHCILC?
LBNEMu2e
Project X+LBNEMu2eν Factory
2012 2018
P AugerDM SearchesSDSS
P AugerDM: scalable?DES
JDEMDM searches
JDEM
Ener
gyIn
tens
ityC
osm
ic
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Fermilab: facilities and experiments
P. Oddone, NAS Board on Physics and Astronomy6
TevatronLHC
LHCLHC upgrades
LHCCLIC orMuon Collider ?
Now 2015
LHCILC?
2012 2018
Ener
gy
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Green curve: same rates as 09
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Tevatron Performance: Run II from 2002 to 2009
P. Oddone, NAS Board on Physics and Astronomy7
FY09
FY10
FY08
FY07
FY05
FY03FY02
FY06
FY04
year year
Coming back very fast after a long shutdown
Int. Lum / week Total Luminosity
Ran ~20 months without a long shutdown
Initial instantaneous lum ~ 3 x 1032 cm-2s-1
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Precision Higgs constraints
P. Oddone, NAS Board on Physics and Astronomy8
Now mH < 157 GeV @95%CL (mH < 186 GeV when LEP limit inclued)
with 10 fb-1 mH < 117 GeV @95%CL (δmW=15MeV, δmt=1GeV)
Tevatron and LEP2 (prel.)
mH = 87+35-26 GeV
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The Higgs Search• Over the last years,
there’s been a dramatic infusion of people, effort and ideas, aimed at finding the Higgs
P. Oddone, NAS Board on Physics and Astronomy9
• The SM Higgs (if it exists) is being produced NOW
Just not that often & it’s buried in “backgrounds”
It will take luminosity, persistence and luck
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SM Higgs Search Result: November
P. Oddone, NAS Board on Physics and Astronomy10
Update and new Tevatron combination expected for HCP conference in November
CDF Prelim. 2.0-4.8 fb-1 DØ Prelim. 0.9-5.0 fb-1
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September 10, 2008
• The LHC has first closed orbit; 300 press outfits at CERN; hoopla everywhere
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September 19th, 2008
• The demons take over: a quench at one of the splices leads to failure of a splice, arc that vaporizes vacuum pipe and six tons of superfluid helium spill and overpressure the many cryostats
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The LHC repairs in detail
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Tracker Insertion: Dec’07CMS Detector
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US involvement is huge!
P. Oddone, NAS Board on Physics and Astronomy15
Exp. Univ. Labs. % CMS 47 1 34%ATLAS 34 4 23%ALICE 11 3 4%LHCb 1 1%
The LHC provides a great opportunity to the US HEP community for the next two decades
LHC has been the largest investment in HEP over the last decade of both capital and human resources
It is important to continue to be a good partner to CERN
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P. Oddone, NAS Board on Physics and Astronomy1616
Lepton colliders beyond LHC
LHC Results
ILC Enough
ILC not enough
CLIC
Muon collider
or
or
By far the easiest!
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P. Oddone, NAS Board on Physics and Astronomy
ILC/Project X technology at Fermilab
Vertical Test Stand
Horizontal Test Stand
1st cryomodule
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Muon Collider R&D
• For a machine of greater energy than the ILC:
Together with the existing collaboration on muon collider and neutrino factory we have proposed to carry out feasibility study in the next few years
Several aspects require new technologies: mostly in capturing and cooling muon beams
Time scale for either CLIC or a muon collider is well beyond a possible ILC
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Muon collider layout
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4 TeV
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Fermilab: facilities and experiments
P. Oddone, NAS Board on Physics and Astronomy21
Now 20152012 2018
P AugerCDMSCOUPPSDSS
P AugerP Auger North?DM: scalable?DES
JDEMDM searchesHolometer?
JDEM
Cos
mic
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Intensity Frontier
P. Oddone, NAS Board on Physics and Astronomy22
MinosMiniBooNEArgoNeut
NOvAMicroBooNEMINERvA
Now 2015
LBNEMu2e
Project X+LBNEMu2eν Factory
2012 2018
Inte
nsity
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Two avenues to real understanding !
P. Oddone, NAS Board on Physics and Astronomy23
Intensity frontier: the most particles
Allows the study of neutrinos and rare process
Sensitive to physics far beyond the LHC, but only indirectly
Need to measure multiple processes
LHC: direct production of heavy particles
Wonderful direct discoveries of physics beyond the Standard Model
Very difficult and often impossible to study how new particles couple to each other and to ordinary particles
Need both for a complete understanding
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Interplay: LHC Intensity Frontier
P. Oddone, NAS Board on Physics and Astronomy24
LHC
nothing
Lots
Intensity Frontier
Only handle on the next energy scale
Determine/verifystructure of new physics. Anything beyond?
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Example: early discovery at LHC
• ATLAS discovers strongly coupled SUSY
• A host of new particles: fit roughly some masses, make assumption on couplings
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˜ q
˜ g
dark matter candidate χ01
χ01~
~
Missing ET
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Large effects in kaon decay rates
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d dW
Z
quarks
dd
WW
ν
νν
ν
s d quarkss
lepts
d
d d
squarks
dd
ν
νν
ν
s d squarkss
slepts
d
χ
χ
χχ
SM: ΚL π0 ν ν
BSM: ΚL π0 ν ν
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For particular classes of SUSY
• Large effect on rare K decay modes highly suppressed with SM particles
• Much higher SM backgrounds in B and C decays
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]4[]3[00
]2[151051
]1[
10
)CL %90( 670 04.0280
731 070850 )(
Experiment (SM)Theory )10( Ratio Branching Decay
<±→
±→
×
+++
.K...K
L
..-
ννπ
γννπ
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Or models with extra dimensions
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+ one sigma
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Same for many other experiments
• Neutrinos LBNE
• Proton decay (same detector as LBNE)
• Charged lepton number violation experiments
• Other rare decays
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Central to intensity frontier: neutrinos
• Only weak interactions: very small cross sections >> hard to study
• Need large flux of particles and massive detectors
• Complementary to LHC: measure neutrino parameters (new symmetries?), neutrino masses, matter-antimatter symmetry violation and surprises.
• Long base-line and high intensities
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L = 1290 km
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Intensity frontier: DUSEL
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Mu2e can probe 103 – 104 TeV
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Compositeness
SUSY
Model Parameter
New PhysicsScale (TeV)
MEG Experiment
with Project X
pre-Project X
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Ultimately will need Project X
• Provide the most powerful beam of neutrinos to the Homestake site for the highest parameter reach in neutrino physics
• Provide the most intense proton beams for muon, kaon, low energy neutrino physics and other possible applications – without affecting the neutrino program
• Develop Project X to serve as the front end of future facilities like a neutrino factory or muon collider
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Evolution of the Project X concept
• Originally an 8 GeV pulsed linac (5Hz, 1 msec pulses) with accumulation in the Recycler storage ring and acceleration to high energy in the Main Injector
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OriginalIdea
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Project X and LBNE to Homestake
• 5% of the time line, the 2 GeV linac feeds a simple Rapid Cycling Synchrotron (RCS), 500m circumference, to strip, accumulate and boost the energy to 8 GeV
• Six pulses of the SAB are transferred to the recycler, filling the existing recycler, and every 1.4 sec transferred to the Main Injector for acceleration to high energies (60 GeV to 120 GeV)
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2 MW toDUSEL
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Project X and 8 GeV beams
• 8/14 RCS cycles are available for an 8 GeV program driven by a fast spill (single turn). An example is a much upgraded muon g-2
• Slow extraction as needed for rare processes is very limited from circular machines: only method is resonance extraction which is “rad dirty” and limits extraction to 10s of kW.
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8 GeVFast spill
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Project X and 2 GeV beams
• The greatest potential for rare processes comes from 2 MW continuous beam. Intensity experiments need continuous beam: pile up is the main limitation in pulsed beams
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2 MW at 2+ GeV
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Project X
• By a large margin, the best machine in the world at the intensity frontier for neutrino, kaon and muon beams
• Would maintain the vitality of the domestic US program by creating many physics opportunities; more than 1000 users
• Would develop and exercise the technologies to position the US to host a global facility at the energy frontier (or contribute to one elsewhere)
• Attract major international participation
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In conclusion
• Fermilab together with the community are developing a vital national program that is complementary to the LHC
• This program fits within the financial envelope predicted for Office of Science in the next few years
• The program has flexibility: can adapt to future results and funding scenarios
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