Places to learn more: Particle and nuclear physics links

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Presentation transcript:

Places to learn more: Particle and nuclear physics links

Inquiring minds want to know... Yo! What holds it together?

Fermi National Accelerator Laboratory (near Chicago)

CDFMinos

Stanford Linear Accelerator Center

Event display from the SLD experiment at SLAC

What forces exist in nature? What is a force? How do forces change with energy or temperature? How has the universe evolved? How do they interact?

Mini-Ph.D. – Quantum Mechanics 101 Lesson 1: Size actually does matter.

Determine the postion and velocity of a car … no problem

Determine the postion and velocity of a small particle … no problem

Problem! Heisenberg uncertainty principle Cannot have perfect knowledge of both the position and velocity Heisenberg

Dear Steve, Party relatively hard! -Al The fundamental nature of forces: virtual particles  E  t  h Heisenberg E = mc 2 Einstein e-e-

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quarks leptons Gauge bosons u c t d s b e   W, Z, g,  G g Hadrons Baryons qqq qq mesons p = uud n = udd K = us or us  = ud or ud Strong interaction nuclei e atoms Electromagnetic interaction 

26 Strong color field Energy grows with separation !!! E=mc 2 ! “white” proton quark quark-antiquark pair created from vacuum “white” proton (confined quarks) “white”  0 (confined quarks) Quantum Chromodynamics QCD distance energy density, temperature relative strength asymptotic freedom Why bare quarks have never been observed. Thanks to Mike Lisa (OSU) for parts of this animation

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29 e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq e+e-e+e-e+e-e+e-qq qq qq e+e-e+e-e+e-e+e- qq e+e-e+e-e+e-e+e- qq qq e+e-e+e-e+e-e+e- Much ado about NOTHING: Nothing is something Nothing has energy Nothing interacts with something -R. Kolb