Lecture 21 The Standard Model (37 pages)
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Lecture 21 The Standard Model
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 37
 School:
 University of Texas at Arlington
 Course:
 Phys 3446  Nuclear and Particle Physics
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PHYS 3446 Lecture 21 Monday Nov 27 2006 Dr Jae Yu 1 The Standard Model Quarks and Leptons Gauge Bosons Symmetry Breaking and the Higgs particle Higgs Search Strategy Issues in the Standard Model Neutrino Oscillations Monday Nov 27 2006 PHYS 3446 Fall 2006 Jae Yu 1 Announcements Workshop on Saturday Dec 2 10am 5pm CPB 303 and other HEP areas Write up due Before the class Wednesday Dec 6 Remember to send me your talk slides sufficiently before the class on the day of your presentation Will spend some time with Dr Young Kee Kim on Dec 6 after your presentations Monday Nov 27 2006 PHYS 3446 Fall 2006 Jae Yu 2 Presentation Schedule Monday Dec 4 1 2 3 4 5 6 Wednesday Dec 6 1 2 3 4 5 Monday Nov 27 2006 Shane Daniel Heather Justin Cassie Layne Pierce Jessica James Matt Lauren PHYS 3446 Fall 2006 Jae Yu 3 Time Reversal Invert time from t t T t t JJJG G G T r r JJJG G G G G T mr p p mr JJJG G G G G G G G G L r p JJJG T r p r p L How about Newton s equation of motion 2G d r G C m 2 F 2 r dt r T JJJG 2G 2G d r d r G C m 1 m 2 F 2 r 2 dt dt r 2 Invariant under time reversal Monday Nov 27 2006 PHYS 3446 Fall 2006 Jae Yu 4 Charge Conjugate Conversion of charge from Q Q C Q Q JJJG G G q q E c 2 r JJJG C c 2 r E rG r G G G ds r ds r B cI C c I B JJJG 2 2 r r Under this operation particles become antiparticles What happens to the Newton s equation of motion 2G 2G 2 G G d r C d r q 2 C m 2 2 1 r F m 2 F 2 r JJJG dt r dt r Invariant under charge conjugate Monday Nov 27 2006 PHYS 3446 Fall 2006 Jae Yu 5 The Standard Model of Particle Physics Prior to 70 s low mass hadrons are thought to be the fundamental constituents of matter despite some new particles that seemed to have new flavors Even lightest hadrons protons and neutrons show some indication of substructure Such as magnetic moment of the neutron Raised questions whether they really are fundamental particles In 1964 Gell Mann and Zweig suggested independently that hadrons can be understood as composite of quark constituents Recall
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