the higgs boson - university of oregonpages.uoregon.edu/jimbrau/talks/quarknet_130626.pdf · what...
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Jim Brau Oregon QuarkNet June 26, 2013
http://www.AstroPics.com
THE HIGGS BOSON
WINDOW ON THE BIG BANG
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
Science
21 Dec 2012
BREAKTHROUGHOF THE YEAR
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Jim Brau Oregon QuarkNet June 26, 2013
Science
21 Dec 2012
BREAKTHROUGHOF THE YEAR
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Jim Brau Oregon QuarkNet June 26, 2013
Higgs Boson
What is the Higgs Boson?
Why is it important?
What was its role in the early universe (the Big Bang)?
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Jim Brau Oregon QuarkNet June 26, 2013
1929 - Hubble Discovered Universe is Expanding
Edwin Powell Hubble (1889-1953)
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Jim Brau Oregon QuarkNet June 26, 2013
1929 - Hubble Discovered Universe is Expanding
Edwin Powell Hubble (1889-1953) 1929
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Jim Brau Oregon QuarkNet June 26, 2013
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 Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
Universe’s Glow in Microwavesdiscovered in 1965
predicted following Hubble’s discovery
confirmed early universe of Big Bang
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Jim Brau Oregon QuarkNet June 26, 2013
Big Bang
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Jim Brau Oregon QuarkNet June 26, 2013
Big Bang
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
Particles and Forces “interactions”Particles
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
flea
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Jim Brau Oregon QuarkNet June 26, 2013
flea
fairyfly
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Jim Brau Oregon QuarkNet June 26, 2013
Forces “interactions”
1850• Gravity • Electricity• Magnetism
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Jim Brau Oregon QuarkNet June 26, 2013
Forces “interactions”Are Forces Related?
1850• Gravity • Electricity• Magnetism
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Jim Brau Oregon QuarkNet June 26, 2013
Forces “interactions”Are Forces Related?
Unified theory• Electromagnetism• Light (photons)
{1864• Gravity • Electricity• Magnetism
J.C. Maxwell
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Jim Brau Oregon QuarkNet June 26, 2013
Forces “interactions”Are Forces Related?
Unified theory• Electromagnetism• Light (photons)
1864• Gravity • Electromagnetism
J.C. Maxwell
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Jim Brau Oregon QuarkNet June 26, 2013
• Gravity
Forces “interactions”Are Forces Related?
Early 20th Century
• Electromagnetism
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Jim Brau Oregon QuarkNet June 26, 2013
• Gravity
Forces “interactions”Are Forces Related?
{Early 20th Century
• Electromagnetism
Albert Einstein
Einstein worked for yearson a unified theory of
Electromagnetism and GravityUNSUCCESSFULLY
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Jim Brau Oregon QuarkNet June 26, 2013
• Gravity • Electromagnetism• Weak Nuclear• Strong Nuclear
Forces “interactions”Are Forces Related?
1950
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Jim Brau Oregon QuarkNet June 26, 2013
• Gravity • Electromagnetism• Weak Nuclear• Strong Nuclear
Forces “interactions”Are Forces Related?
•Electroweak{19502000
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Jim Brau Oregon QuarkNet June 26, 2013
• Gravity • Electromagnetism• Weak Nuclear• Strong Nuclear
Forces “interactions”Are Forces Related?
Anticipated- discovery of
the Higgs Bosonat accelerators
•Electroweak{19502000
P. Higgs
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Jim Brau Oregon QuarkNet June 26, 2013
• 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
Are all forces related?New particles would be involved in any unification
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
Indirect evidence of HiggsBefore the LHC
• Since the Higgs boson interacts with fundamental particles (in theory) experiments can detect indirect evidence for it and “measure” its mass 2005
Z Z
2005
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Jim Brau Oregon QuarkNet June 26, 2013
Indirect evidence of HiggsBefore the LHC
• Since the Higgs boson interacts with fundamental particles (in theory) experiments can detect indirect evidence for it and “measure” its mass 2005
Z Z
2005
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• pre-LHC experiments find MH = 129 GeV (assuming Standard Model)
Jim Brau Oregon QuarkNet June 26, 2013
Indirect evidence for HiggsBefore the LHC
2005
0
1
2
3
4
5
6
10030 500mH [GeV]
6r2
Excluded
6_had =6_(5)
0.02758±0.000350.02749±0.00012incl. low Q2 data
Theory uncertainty
+74-49
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Jim Brau Oregon QuarkNet June 26, 2013
Large Hadron Collider (LHC)Geneva, Switzerland
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Large Hadron Collider
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Large Hadron Collider17 mile circumference main ring
300 feet underground
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Large Hadron Collider17 mile circumference main ring
300 feet undergroundProton beams of particles circulate in both directions
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Large Hadron Collider17 mile circumference main ring
300 feet undergroundProton beams of particles circulate in both directions1600 SuperC magnets @ 8.3 Tesla
Temp= 2 K10,000 MegaJoules stored energy
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Large Hadron Collider17 mile circumference main ring
300 feet undergroundProton beams of particles circulate in both directions1600 SuperC magnets @ 8.3 Tesla
Temp= 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 Collider17 mile circumference main ring
300 feet undergroundProton beams of particles circulate in both directions1600 SuperC magnets @ 8.3 Tesla
Temp= 2 K10,000 MegaJoules stored energy
600,000,000 collisions per second at 14,000,000,000,000 eVolts So far at 7 and 8,000,000,000,000 eV (7, 8 TeV)
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Large Hadron Collider
Proton beam stores 700 MegaJoulesequiv. to 747 energy on take-offenough to melt 1/2 ton copper
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Jim Brau Oregon QuarkNet June 26, 2013
UO Group Worked on Search for the Higgs Boson at LHC
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Jim Brau Oregon QuarkNet June 26, 2013
UO Group Worked on Search for the Higgs Boson at LHC
Higgs Boson is VERY HEAVY
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Jim Brau Oregon QuarkNet June 26, 2013
UO Group Worked on Search for the Higgs Boson at LHC
Higgs Boson is VERY HEAVY Equivalent to 133 Hydrogen atoms
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Jim Brau Oregon QuarkNet June 26, 2013
UO Group Worked on Search for the Higgs Boson at LHC
Higgs Boson is VERY HEAVY Equivalent to 133 Hydrogen atoms
or one Cesium atom
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Jim Brau Oregon QuarkNet June 26, 2013
UO Group Worked on Search for the Higgs Boson at LHC
Higgs Boson is VERY HEAVY Equivalent to 133 Hydrogen atoms
or one Cesium atom126,000,000,000 eV = 126 GeV
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Jim Brau U. Oregon, Eugene October 29, 2012
Search for the Higgs Boson at the LHC
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Jim Brau U. Oregon, Eugene October 29, 2012
Search for the Higgs Boson at the LHC
slow motion
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Jim Brau U. Oregon, Eugene October 29, 2012
Search for the Higgs Boson at the LHC
slow motion
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Jim Brau U. Oregon, Eugene October 29, 2012
Search for the Higgs Boson at the LHC
slow motion
E=mc2
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Jim Brau U. Oregon, Eugene October 29, 2012
Search for the Higgs Boson at the LHC
slow motion
E=mc2
or Energy equals Mass
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Jim Brau U. Oregon, Eugene October 29, 2012
Producing the Higgs Boson at the LHC
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Jim Brau U. Oregon, Eugene October 29, 2012
Producing the Higgs Boson at the LHC
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Jim Brau U. Oregon, Eugene October 29, 2012
Producing the Higgs Boson at the LHC
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Jim Brau U. Oregon, Eugene October 29, 2012
Producing the Higgs Boson at the LHC
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
• The experiments ATLAS and CMS announced evidence for the Higgs Boson
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
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Jim Brau Oregon QuarkNet June 26, 2013
July 4, 2012
ATLAS Collaboration,including UO Group,
Announced Discovery
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Jim Brau Oregon QuarkNet June 26, 2013
July 4, 2012
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Jim Brau Oregon QuarkNet June 26, 2013
July 4, 2012
Peter Higgs
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Jim Brau Oregon QuarkNet June 26, 2013
Fabiola Gianotti (CERN), representing the ATLAS Collaboration July 4, 2012 slide 44
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Jim Brau Oregon QuarkNet June 26, 2013
Five Sigma Confidence
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Jim Brau Oregon QuarkNet June 26, 2013
Five Sigma Confidence
• Five sigma is the threshold particle physics requires for DISCOVERY (very high standard)
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Jim Brau Oregon QuarkNet June 26, 2013
Five Sigma Confidence
• Five sigma is the threshold particle physics requires for DISCOVERY (very high standard)
• THEN, randomness could produce the same result ONLY once in 3.5 million times
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Jim Brau Oregon QuarkNet June 26, 2013
Five Sigma Confidence
• Five sigma is the threshold particle physics requires for DISCOVERY (very high standard)
• THEN, randomness could produce the same result ONLY once in 3.5 million times
• Example - flip coin 22 times and heads EVERY time
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Jim Brau Oregon QuarkNet June 26, 2013
Five Sigma Confidence
• Five sigma is the threshold particle physics requires for DISCOVERY (very high standard)
• THEN, randomness could produce the same result ONLY once in 3.5 million times
• Example - flip coin 22 times and heads EVERY time possible, but very unlikely for normal coin
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
ATLAS DetectorWeight- 7000 tons
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
• Evidence for the Higgs Boson that ATLAS and CMS resulted from:
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Jim Brau U. Oregon, Eugene October 29, 2012
July 4, 2012
• Evidence for the Higgs Boson that ATLAS and CMS resulted from:–1 in 1,000,000,000,000 collisions appear to
produce two photons from a new particle
–data collected in 2011 and early 2012
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Jim Brau Oregon QuarkNet June 26, 2013
What is the Higgs Boson?Peter Higgs(1929- )
Satyendra Nath Bose(1894-1974)
Text
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Jim Brau Oregon QuarkNet June 26, 2013
What is the Higgs Boson?
• Theory postulated in 1964
Peter Higgs(1929- )
Satyendra Nath Bose(1894-1974)
Text
by P. Higgs, R. Brout , F. Englert, G. S. Guralnik, C. R. Hagen, and T. W. B. Kibble
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Jim Brau Oregon QuarkNet June 26, 2013
What is the Higgs Boson?
• Theory postulated in 1964–historical era
Peter Higgs(1929- )
Satyendra Nath Bose(1894-1974)
Text
The Beatles arrive in USA,Kennedy Airport, Feb 1964
by P. Higgs, R. Brout , F. Englert, G. S. Guralnik, C. R. Hagen, and T. W. B. Kibble
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Jim Brau Oregon QuarkNet June 26, 2013
What is the Higgs Boson?
• Theory postulated in 1964–historical era
Peter Higgs(1929- )
Satyendra Nath Bose(1894-1974)
Text
The Beatles arrive in USA,Kennedy Airport, Feb 1964
President Johnson signs Civil Rights Act,
July, 1964
by P. Higgs, R. Brout , F. Englert, G. S. Guralnik, C. R. Hagen, and T. W. B. Kibble
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Jim Brau Oregon QuarkNet June 26, 2013
What is the Higgs Boson?
• Theory postulated in 1964–historical era
Peter Higgs(1929- )
Satyendra Nath Bose(1894-1974)
Text
The Beatles arrive in USA,Kennedy Airport, Feb 1964
President Johnson signs Civil Rights Act,
July, 1964
Mad Men, AMC
by P. Higgs, R. Brout , F. Englert, G. S. Guralnik, C. R. Hagen, and T. W. B. Kibble
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Jim Brau Oregon QuarkNet June 26, 2013
Higgs Boson
• Higgs bosons carry no spin - unique!• Distributed throughout space, they create
a Higgs condensate - a pure vacuum with energy
• This very stable vacuum field results from the mutual interactions of Higgs bosons
• To make them visible we must create a disturbance in the uniform Higgs field
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Jim Brau Oregon QuarkNet June 26, 2013
The Higgs Boson is Different
• The Higgs is both force and matter particle• Particle properties unique to known
fundamental particles–- spinless
• Possible key to unity of forces and the underpinnings of the universe
• Could be the first discovered member of a new form of matter (scalars)
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Jim Brau Oregon QuarkNet June 26, 2013
The Higgs Field
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Jim Brau Oregon QuarkNet June 26, 2013
The Higgs Field
• Familiar fields
Earth’s gravity Magnetism
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Jim Brau Oregon QuarkNet June 26, 2013
The Higgs Field
• Familiar fields
Earth’s gravity Magnetism
graviton photon
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Jim Brau Oregon QuarkNet June 26, 2013
The Higgs Field
• Familiar fields
Earth’s gravity Magnetism• The Higgs is both a field and a particle
graviton photon
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Jim Brau Oregon QuarkNet June 26, 2013
Higgs Boson TheoryPeter Higgs Kibble, Guralnik, Hagen,
Englert, Brout
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Jim Brau Oregon QuarkNet June 26, 2013
Higgs Boson Theory
• Higgs field fills the universe
Peter Higgs Kibble, Guralnik, Hagen, Englert, Brout
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Jim Brau Oregon QuarkNet June 26, 2013
Higgs Boson Theory
• Higgs field fills the universe
• Interacts with fundamental particles to give them mass
Peter Higgs Kibble, Guralnik, Hagen, Englert, Brout
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Jim Brau Oregon QuarkNet June 26, 2013
Higgs Boson Theory
• Higgs field fills the universe
• Interacts with fundamental particles to give them mass
• Separates electromagnetism and the weak nuclear force–photon remains massless
Peter Higgs Kibble, Guralnik, Hagen, Englert, Brout
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Jim Brau U. Oregon, Eugene October 29, 2012
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Jim Brau Oregon QuarkNet June 26, 2013
Why is the Higgs Important?PARTICLE PHYSICS
• It gives mass to the fundamental particles of Nature –quarks, leptons, fundamental bosons, ....–without mass electrons would zip along at the
speed of light and atoms would not form
• It produces differences in the fundamental forces –electromagnetism and the weak nuclear force
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Jim Brau Oregon QuarkNet June 26, 2013
Why is the Higgs Important?COSMOLOGY
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Jim Brau Oregon QuarkNet June 26, 2013
Why is the Higgs Important?COSMOLOGY
• Big Bang produced massless particles–13.8 billion years ago
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Jim Brau Oregon QuarkNet June 26, 2013
Why is the Higgs Important?COSMOLOGY
• Big Bang produced massless particles–13.8 billion years ago
• Higgs field appeared everywhere
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Jim Brau Oregon QuarkNet June 26, 2013
Why is the Higgs Important?COSMOLOGY
• Big Bang produced massless particles–13.8 billion years ago
• Higgs field appeared everywhere• Universe expanded and cooled
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Jim Brau Oregon QuarkNet June 26, 2013
Why is the Higgs Important?COSMOLOGY
• Big Bang produced massless particles–13.8 billion years ago
• Higgs field appeared everywhere• Universe expanded and cooled • Fundamental particles of Nature,
initially massless, acquired mass from the Higgs field
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Jim Brau Oregon QuarkNet June 26, 2013
Why is the Higgs Important?COSMOLOGY
• Big Bang produced massless particles–13.8 billion years ago
• Higgs field appeared everywhere• Universe expanded and cooled • Fundamental particles of Nature,
initially massless, acquired mass from the Higgs field
• Particles slowed, bunched up and eventually formed atoms, and atoms formed ...
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
What is Matter?
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Jim Brau Oregon QuarkNet June 26, 2013
What is Matter?
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Jim Brau Oregon QuarkNet June 26, 2013
What is Matter?
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Jim Brau Oregon QuarkNet June 26, 2013
What is Matter?
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Jim Brau Oregon QuarkNet June 26, 2013
What is Matter?
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Jim Brau Oregon QuarkNet June 26, 2013
What is Matter?
all Atomiccomposed of quarks and leptons
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Jim Brau Oregon QuarkNet June 26, 2013
We know galaxies are surrounded by dark halos of mysterious, unidentified stuff (dark matter).
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Jim Brau Oregon QuarkNet June 26, 2013
Expected-based on stellar mass
We know galaxies are surrounded by dark halos of mysterious, unidentified stuff (dark matter).
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Jim Brau Oregon QuarkNet June 26, 2013
Observed-reveals invisible (“dark”) mass
Expected-based on stellar mass
Vera Rubin1950s
We know galaxies are surrounded by dark halos of mysterious, unidentified stuff (dark matter).
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Jim Brau Oregon QuarkNet June 26, 2013
This pie represents all the “stuff” in the
universe
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Jim Brau Oregon QuarkNet June 26, 2013
4% Atoms
This pie represents all the “stuff” in the
universe
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Jim Brau Oregon QuarkNet June 26, 2013
The Matter Crisis• not enough matter (atomic or dark matter)
to “make-up” known stuff of the Universe
4% Atoms
This pie represents all the “stuff” in the
universe
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Jim Brau Oregon QuarkNet June 26, 2013
Acceleration Componentcalled “Dark Energy”
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Jim Brau Oregon QuarkNet June 26, 2013
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 Oregon QuarkNet June 26, 2013
The Dark Side Controls the Universe
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Jim Brau Oregon QuarkNet June 26, 2013
The Dark Side Controls the Universe
Dark Matter HOLDS IT TOGETHER
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Jim Brau Oregon QuarkNet June 26, 2013
The Dark Side Controls the Universe
Dark Matter HOLDS IT TOGETHER
Dark Energy DETERMINES ITS DESTINY
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Jim Brau Oregon QuarkNet June 26, 2013
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 Oregon QuarkNet June 26, 2013
Linear Colliderelectron-positron collider
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Jim Brau Oregon QuarkNet June 26, 2013
Linear Colliderelectron-positron collider
FUTUREOffers more precise studies of Higgs and other
possible new physicsWorld-wide collaboration (including UO team)
has developed the technologyReady to start construction
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Jim Brau Oregon QuarkNet June 26, 2013
LHC / ILC comparison
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Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC
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Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC• Controlled production of the Higgs boson
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Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC• Controlled production of the Higgs boson• Tag events looking only at the Z (independent of
behavior of the Higgs - then look at the Higgs
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Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC• Controlled production of the Higgs boson• Tag events looking only at the Z (independent of
behavior of the Higgs - then look at the Higgs• Is Higgs consistent with Standard Model, or not?
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Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC
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~
Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC~~~ →
• pe + pe = pZ + pH (4 vectors => E and p)
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~
Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC
~~~ ~
~~~
~~~~
→• pe + pe = pZ + pH (4 vectors => E and p)• pH = pe + pe - pZ => pH2 = MH2 = (pe + pe - pZ)2
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~
Jim Brau Oregon QuarkNet June 26, 2013
Higgstrahlung at ILC
~~~ ~
~~~
~~~~
→• pe + pe = pZ + pH (4 vectors => E and p)• pH = pe + pe - pZ => pH2 = MH2 = (pe + pe - pZ)2
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Jim Brau Oregon QuarkNet June 26, 2013
Higgs boson decays
Standard ModelPrediction
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Jim Brau Oregon QuarkNet June 26, 2013
Hierarchy Problem
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Jim Brau Oregon QuarkNet June 26, 2013
Hierarchy Problem• Mass of the Higgs boson is affected by radiative
corrections (very large)
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Jim Brau Oregon QuarkNet June 26, 2013
Hierarchy Problem• Mass of the Higgs boson is affected by radiative
corrections (very large)
relation for Higgs mass:
• mH2 = bare mass2 + (R.C.)2
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Jim Brau Oregon QuarkNet June 26, 2013
Hierarchy Problem• Mass of the Higgs boson is affected by radiative
corrections (very large)
relation for Higgs mass:
• mH2 = bare mass2 + (R.C.)2
• New physics needed to keep mass small (125 GeV)
by canceling R.C.
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Jim Brau Oregon QuarkNet June 26, 2013
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Jim Brau Oregon QuarkNet June 26, 2013
Possible solutions to Hierarchy Problem
• Supersymmetry–new particles truncate radiative corrections
• Extra dimensions–motivated by string theory
• Composite Higgs–not fundamental scalar - rather, composite particle –new force, eg. Technicolor, binds heavy particles into
Higgs boson
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Jim Brau Oregon QuarkNet June 26, 2013
Are there any practical applications?
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Jim Brau Oregon QuarkNet June 26, 2013
1897 - J.J. Thomson
Credit: American Institute of Physics
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Jim Brau Oregon QuarkNet June 26, 2013
1897 - J.J. Thomson
Credit: American Institute of Physics
- Electron
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Jim Brau Oregon QuarkNet June 26, 2013
J.J. Thomson, On 1897 Discovery
Credit: American Institute of Physics
Speaking in 1934
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Jim Brau Oregon QuarkNet June 26, 2013
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.
Speaking in 1934
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Jim Brau Oregon QuarkNet June 26, 2013
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.
that its mass is an insignificant fraction of the mass of an atom of hydrogen? --
Speaking in 1934
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Jim Brau Oregon QuarkNet June 26, 2013
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
that its mass is an insignificant fraction of the mass of an atom of hydrogen? --
Speaking in 1934
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that a crowd of these atoms equal in number to the population of the whole world
Jim Brau Oregon QuarkNet June 26, 2013
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
that its mass is an insignificant fraction of the mass of an atom of hydrogen? --
Speaking in 1934
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that a crowd of these atoms equal in number to the population of the whole world
Jim Brau Oregon QuarkNet June 26, 2013
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 Oregon QuarkNet June 26, 2013
Summary:Higgs Boson:
Window on the Big Bang• Higgs boson aims to explain mysteries of physics
and early universe• Higgs boson-like particle discovered in 2012 by
large, international collaborations at the LHC in Switzerland (including strong UO team)
• Detailed properties of new particle will be measured in more detail to determine its full nature
• LHC experiments search for more - eg. Dark Matter• Future - International Linear Collider
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Jim Brau Oregon QuarkNet June 26, 2013
RESEARCH SUPPORTED BY
Department of Energy OFFICE OF SCIENCE
NATIONAL SCIENCE FOUNDATION
Philip H. Knight
Acknowledgement: images from http://www.AstroPics.com
Acknowledgements
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Jim Brau Oregon QuarkNet June 26, 2013