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Weak Force • Weak interactions are responsible for the decay <strong>of</strong> massive quarks and leptons into lighter quarks and leptons • Example: neutron to decay into proton + electron + neutrino • This is why all matter consists <strong>of</strong> the lightest quarks and leptons (plus neutrinos)
Electroweak Force • In the Standard Model, the weak and the electromagnetic forces have been combined into a unified electroweak theory • At very short distances (~10 -18 meters), the weak and electromagnetic interactions have comparable strengths • Force particles are photon, W and Z
Page 1 and 2: The Standard Model of Particles and
Page 3 and 4: New Particles
Page 5 and 6: More lepton and quark generations (
Page 7 and 8: Quarks • We now know that even pr
Page 9 and 10: Generations • The six quarks and
Page 11 and 12: Size inside atoms • The nucleus i
Page 13 and 14: Matter and Antimatter • For every
Page 15 and 16: What about Leptons? • There are s
Page 17 and 18: Four Forces • There are four fund
Page 19: The Gluon • The strong force hold
Page 23 and 24: Interaction Summary
Page 25 and 26: Electron-Positron Annihilation
Page 27 and 28: Mysteries and Failures • The Stan
Page 29 and 30: Three Generations • There are thr
Page 31 and 32: Grand Unified Theory • We believe
Page 33 and 34: • Modern physics has theories for
Page 35 and 36: Dark Matter • It appears that the
Page 37 and 38: The Expanding Universe • Studies
Page 39: • Today -Tevatron • Soon - Larg
Page 42 and 43: ATLAS Detector at CERN’s Large Ha
Page 44 and 45: Einstein’s Dream • Is there an
Page 46 and 47: A Promising Model - Supersymmetry(S
Page 48 and 49: Standard Model and Supersymmetry
Page 50 and 51: • Answers to origins of Dark Matt

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