• QUESTIONS BEFORE LECTURE 41

now think about these

• Define a gauge boson.
• Name the four gauge bosons, only there are more than four! (Some interactions have more than one.)
• What does the gauge in gauge boson or gauge theory refer to?
• What is the role of each force?
• What property gives rise to each force?
• Which of the elementary particles have the property which makes them able to feel any given force?
• Which particle can feel all four forces?
• Which force can all particles feel?
• List all the things for each force which make it different from the other three.
• What sizes are the couplings of the forces which are most noticeable in the room where you are? (These are the Unit 1 forces.)
• What happens to the couplings at higher energies?
• What is the Standard Model?
• What is a unified field theory?
• What does the Higgs boson do?
• What Nobel prizes have been awarded for the theory or evidence of gauge bosons?
• What UW physicist was a co-discoverer of the gluon?