An Overview of the Standard Modelzeus.phys.uconn.edu/wiki/images/UMC-2014_Standard... · What is...
Transcript of An Overview of the Standard Modelzeus.phys.uconn.edu/wiki/images/UMC-2014_Standard... · What is...
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An Overview of the Standard Model
By Omar Amer1
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What is the Standard Model?• Describes interactions of sub-atomic particles
• Mass, Charge, Spin
• As fundamental as is known
• Quarks, Leptons, Gauge Bosons
• Three Generations
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Generations of Matter• Matter comes in 3 sets of 2
• Each set more massive
• Less massive is more stable
• Decay to smaller particles
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Forces and Force Carriers• Three (Four) Forces- 5 (known) Force Carriers
• Electroweak-Photon, W± and Z bosons
• Strong-Gluons
• Gravity- Graviton
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Electroweak Force• Combination of electromagnetic and weak forces
• Apparent at high energies
• Weak
• Acts through release and absorption of W± and Z
bosons
• Only path for quarks to change "flavor"
• Interacts with all half integer spin particles (Fermions)
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Electroweak Part II• Electromagnetic Force
• Interacts through release and absorption of
photons
• Charged particles interact
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Leptons• Come in two classes
• Charged
• Neutral (Neutrinos)
• Half Integer Spin
• Mass
• Lepton Number
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Strong Force• Interacts through exchange of gluons
• Gluons have both a color and an anticolor
• Interacts with colored particles only
• Binds quarks together
• Strongest force
• Screened at distances
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Quarks• Make up hadronic matter
• Interact with the strong force through gluons
• "Flavors"
• Have color charge
• Electric charge in thirds
• Color confined
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Color• Quarks come in 6 different "colors"
• Red Blue Green and Anti - Red, Blue and Green
• Multiquark states must neutralize color
• i.e Red + Blue + Green or Red + Anti-Red etc.
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Questions?
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