the mysterious universe - university of oregonlarge hadron collider 17 mile ring circumference 300...
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Jim Brau Albuquerque October 1, 2009
THEMYSTERIOUSUNIVERSE
Exploring Our World With Particle Accelerators
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
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Large Hadron Collider
17 mile ring circumference300 feet underground
1600 SuperC magnets @ 8.3 TeslaTemp= 2 K10,000 MegaJoules stored energy
600,000,000 collisions per second at 14,000,000,000,000 eVolts
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Large Hadron Collider
17 mile ring circumference300 feet underground
1600 SuperC magnets @ 8.3 TeslaTemp= 2 K10,000 MegaJoules stored energy
600,000,000 collisions per second at 14,000,000,000,000 eVoltsProton beam stores 700 MegaJoules
equiv. to 747 energy on take-offenough to melt 1/2 ton copper
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
• Exploring deep mysteries of the fundamental substance of the Universe
• Expect revolutionary discoveries to come soon– impact to human knowledge akin to
quantum revolution of early 20th Century – Dark Matter, Dark Energy, Higgs Boson, Extra
Dimensions, Other New Particles or Forces ...
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http://physics-animations.com
Jim Brau Albuquerque October 1, 2009
Galileo Galilei
image from Science 16 January 2009
1609
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
Aha!F = G M m / r2
Unification
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Jim Brau Albuquerque October 1, 2009
What is the Sun’s source of energy
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– 19th Century - Chemical reactions? (burning) • Predicted solar lifetime too short - only 20,000 years• Evidence on Earth for much longer duration
Jim Brau Albuquerque October 1, 2009
Solar Energy
- 20th Century• Einstein’s relativity E=mc2 • discovery of atomic nucleus
and nuclear reactions
• What is the Sun’s source of energy?
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Jim Brau Albuquerque October 1, 2009
Solar Energy
Enough energy for the Sun to shine for ten billion years
• What is the Sun’s source of energy?
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Jim Brau Albuquerque October 1, 2009
Relativity
• When a man sits with a pretty girl for an hour, it seems like a minute.
• But let him sit on a hot stove for a minute—and it’s longer than any hour.
• That’s relativity.
16
Text
A. Einstein
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
Quasi-stellar Radio Sources(Quasars)
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Jim Brau Albuquerque October 1, 2009
Quasars
3C 273
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• Distant, Active Young Galaxies
Jim Brau Albuquerque October 1, 2009
1963
QuasarsBrightest Objects in the Universe
3C 273
Speed of recession 44,000 km/sec 15% speed of light!
Distance 2.4 billion light yrs
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
1929 - Hubble Discovered Universe is Expanding
Edwin Powell Hubble (1889-1953) 1929
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Jim Brau Albuquerque October 1, 2009
First evidence that Universe began with a Big Bang
1929 - Hubble Discovered Universe is Expanding
Edwin Powell Hubble (1889-1953) 1929
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Jim Brau Albuquerque October 1, 2009
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Jim Brau Albuquerque October 1, 2009
Universe’s Glow in Microwavesdiscovered in 1965
predicted following Hubble’s discovery
confirmed early universe of Big Bang
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Jim Brau Albuquerque October 1, 2009
Big Bang
~~~~~~~~
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Jim Brau Albuquerque October 1, 2009
The Universe is Made of Particles
• Investigating the particles reveals the fundamental structure of the Universe and matter within it
THE ATOM
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Jim Brau Albuquerque October 1, 2009
The Universe is Made of Particles
• Investigating the particles reveals the fundamental structure of the Universe and matter within it
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Jim Brau Albuquerque October 1, 2009
1897 - J.J. Thomson
Credit: American Institute of Physics
- Electron
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that a crowd of these atoms equal in number to the population of the whole world
Jim Brau Albuquerque October 1, 2009
J.J. Thomson, On 1897 Discovery
Could anything at first sight seem more impractical than a body which is so small
Credit: American Institute of PhysicsFrom the soundtrack of the film, Atomic Physicscopyright © J. Arthur Rank Organization, Ltd., 1948.
which itself is so small
would be too small to have been detected by any means then known to science.
that its mass is an insignificant fraction of the mass of an atom of hydrogen? --
Speaking in 1934
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Jim Brau Albuquerque October 1, 2009
20th Century Particle Physics Laboratories
electron linear accelerator at Stanford (SLAC)
proton synchrotron at Fermilab (near Chicago)
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Jim Brau Albuquerque October 1, 2009
- Quarks discovered (inside atomic nucleus) Stanford
electron
proton
1969
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Jim Brau Albuquerque October 1, 2009
- Quarks discovered (inside atomic nucleus) Stanford
electron
protonquarks
1969
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Jim Brau Albuquerque October 1, 2009
1995 - Top Quark Discovered at Fermilab
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Jim Brau Albuquerque October 1, 2009
1995 - Top Quark Discovered at Fermilab
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Jim Brau Albuquerque October 1, 2009
1995 - Top Quark Discovered at Fermilab
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Jim Brau Albuquerque October 1, 2009
1995 - Top Quark Discovered at Fermilab
Creation of massive matter (E=mc2)
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Jim Brau Albuquerque October 1, 2009
Particles
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Jim Brau Albuquerque October 1, 2009
Particles and Forces “interactions”
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Jim Brau Albuquerque October 1, 2009
Particles and Forces “interactions”
• Gravity - weakest
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Jim Brau Albuquerque October 1, 2009
Particles and Forces “interactions”
• Gravity - weakest• Electromagnetism
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Jim Brau Albuquerque October 1, 2009
Particles and Forces “interactions”
• Gravity - weakest• Electromagnetism• Weak Nuclear
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Jim Brau Albuquerque October 1, 2009
Particles and Forces “interactions”
• Gravity - weakest• Electromagnetism• Weak Nuclear• Strong Nuclear
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Jim Brau Albuquerque October 1, 2009
• Gravity • Electricity• Magnetism
Forces “interactions”Are Forces Related?
1850
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Jim Brau Albuquerque October 1, 2009
• Gravity • Electricity• Magnetism
Forces “interactions”Are Forces Related?
Unified theory• Electromagnetism• Light (photons)
{1864
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Jim Brau Albuquerque October 1, 2009
• Gravity • Electromagnetism• Weak Nuclear• Strong Nuclear
Forces “interactions”Are Forces Related?
19502000
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Jim Brau Albuquerque October 1, 2009
• Gravity • Electromagnetism• Weak Nuclear• Strong Nuclear
Forces “interactions”Are Forces Related?
Next Advance Expected- discovery of
the Higgs Bosonat accelerators
•Electroweak{19502000
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Jim Brau Albuquerque October 1, 2009
• Gravity • Electromagnetism• Weak Nuclear• Strong Nuclear
Forces “interactions”Are Forces Related?
{Are all forces related?New particles would be involved in any unification
•Electroweak
19502000
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Jim Brau Albuquerque October 1, 2009
What is Matter?
all Atomic
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Jim Brau Albuquerque October 1, 2009
Halo of Dark Matter
M31 - Andromeda
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Jim Brau Albuquerque October 1, 2009
Halo of Dark Matter
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Jim Brau Albuquerque October 1, 2009
Observed-reveals invisible (“dark”) mass
Expected-based on stellar mass
How we know dark halos surround galaxies?
Vera Rubin1950s
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Jim Brau Albuquerque October 1, 2009
Observed-reveals invisible (“dark”) mass
Expected-based on stellar mass
How we know dark halos surround galaxies?
Vera Rubin1950s
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• 1930s motions of clusters of galaxies cannot be understood – Fritz Zwicky
Jim Brau Albuquerque October 1, 2009
Early Dark Matter Evidence
ComaCluster
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Jim Brau Albuquerque October 1, 2009
Einstein Gravitational Lens
Imaging Dark MatterEven more evidence
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Jim Brau Albuquerque October 1, 2009
Imaging Dark Matter
Hubble Data analyzed by Yale astrophysicistsEinstein Rings
We now know there is much more Dark Matter
than Atomic Matter in the Universe
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Jim Brau Albuquerque October 1, 2009
What is Dark Matter ?
• Perhaps a new form of elementary particle?
• Can we learn from history of physics?
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Jim Brau Albuquerque October 1, 2009
Cosmic Rays1932
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Jim Brau Albuquerque October 1, 2009
- Discovery of Anti-Matter1932
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Jim Brau Albuquerque October 1, 2009
- Discovery of Anti-Matter1932
Anti-particle for every known particle
ELEMENTARYANTI-PARTICLES
Anti-
Quarks
Anti-
Leptons
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Jim Brau Albuquerque October 1, 2009
Candidate Theory Explains Dark Matter
SuperString Theory• Unifies all particles and all forces
– gravity with quantum mechanics• Fundamental particles are represented as
vibrations on string
– Strings are miniscule • Atom is 10,000,000,000,000,000,000,000,000 x bigger
– Requires another set of matching particles• the super-partners of ordinary particles
Dimension of String =10-25 atomic size = 10-35 meters
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Jim Brau Albuquerque October 1, 2009
The Structure of Matter
hypothesis
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• History repeats?• Just as with anti-matter,
New particles are predicted
• The supersymmetric particles have just the properties expected of Dark Matter
Jim Brau Albuquerque October 1, 2009
Supersymmetry, Strings, and Dark Matter
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Jim Brau Albuquerque October 1, 2009
The Matter Crisis• not enough matter (atomic or dark matter)
to “make-up” known stuff of the Universe
4% Atoms
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Jim Brau Albuquerque October 1, 2009
Measuring Expansion of Universe
After Supernova After Supernova After Supernova
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Jim Brau Albuquerque October 1, 2009
Measuring Expansion of Universe
After Supernova After Supernova After Supernova
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Jim Brau Albuquerque October 1, 2009
Measuring Expansion of Universe
Expansion of the Universe
is Accelerating
Driven by Dark Energy
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Jim Brau Albuquerque October 1, 2009
Acceleration Componentcalled “Dark Energy”
• Solves “Matter” Crisis• The dominant “stuff” of the universe is
dark matter and dark energy
4% Atoms
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Jim Brau Albuquerque October 1, 2009
The Dark Side Controls the Universe
Dark Matter HOLDS IT TOGETHER
Dark Energy DETERMINES ITS DESTINY
Dark Matter is strange!Dark Energy stranger?
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Jim Brau Albuquerque October 1, 2009
What is Dark Energy? • No one knows yet
–but we have some hints
• Cautioned by Einstein’s comment (1951) on the understanding of the photon:
– All these fifty years of conscious brooding have brought me no nearer to the answer to the question “what is the light quanta.”
– Nowadays every rascal thinks he knows, but he is mistaken.
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Jim Brau Albuquerque October 1, 2009
Quantum Nature of Nothing is Something
73
Empty SpaceEmpty Space
“Vacuum”
Dark Energy
Dark Matter
Text
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Jim Brau Albuquerque October 1, 2009
Quantum Nature of Nothing is Something
74
Empty SpaceEmpty Space
“Vacuum”
Dark Energy
Dark Matter
Text
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Jim Brau Albuquerque October 1, 2009
Calculating Dark Energy
75
• Solid Quantum Mechanical Foundation- effect of particles in the vacuum
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Jim Brau Albuquerque October 1, 2009
Calculating Dark Energy
76
NO! 1,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,
000,000,000,000,000,000,000,
000,000,000,000,000,000,000,
000,000,000,000,000,000,000,
000,000,000,000,000
times too big=10120
• Does the calculation agree with measurement?
• Solid Quantum Mechanical Foundation- effect of particles in the vacuum
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Jim Brau Albuquerque October 1, 2009
Large Hadron Collider (LHC)Geneva, Switzerland
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Jim Brau Albuquerque October 1, 2009
Large Hadron Collider (LHC)Geneva, Switzerland
Begins operation this year
Will search for Dark Matter,
Higgs Bosons,other New Particles
and Forces
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Jim Brau Albuquerque October 1, 2009
Linear Collider
FUTURE
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Jim Brau Albuquerque October 1, 2009
International Linear Collider (ILC)
FUTURE
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Jim Brau Albuquerque October 1, 2009
Scientific Goals of the LHC and the ILC
• Dark Matter particles• Higgs Boson
–responsible for mass of fundamental particles–responsible for weak nuclear and electromagnetic
force differences• Hidden extra dimensions of space• New forces• New fundamental particles
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Jim Brau Albuquerque October 1, 2009
Particle Accelerators and the Universe
• Big Bang occurred 13.7 billion years ago–expanding Universe, cosmic fireball, other observables
• Universe expanded and cooled; fundamental particles condensed into structures
• Accelerators have revealed fundamental particles and their interactions
• Dark Matter dominates mass of the Universe–controlled early evolution, continues impact today
• Dark Matter discovery could come from next accelerator experiments– Large Hadron Collider (LHC), International Linear Collider (ILC)
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Jim Brau Albuquerque October 1, 2009
One thing I havelearned in a long life:that all our science,measured againstreality, is primitive
and childlike—and yet it is the
most precious thingwe have.
The most beautifulexperience we can
have is themysterious.
It is the fundamentalemotion whichstands at the
cradle of true artand true science.
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Jim Brau Albuquerque October 1, 2009
RESEARCH SUPPORTED BY
Department of Energy OFFICE OF SCIENCE
NATIONAL SCIENCE FOUNDATION
Philip H. Knight
Acknowledgements