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Dimensions of Mass lecture, Tues, Mar 6

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  • telemale@lycosmail.com
    ... Get free personalized email at http://email.lycos.com Physics and Applied Physics Calendar: Applied Physics/Physics Colloquium Physics and Applied Physics
    Message 1 of 1 , Mar 5, 2001
      Physics and Applied Physics Calendar: Applied Physics/Physics Colloquium Stanford University Department of Physics
      Physics and Applied Physics Calendar

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        Subject:   Applied Physics/Physics Colloquium

        Sponsor:   Applied Physics/Physics

        Speaker:   Professor Lawrence Hall

        Date:   Tuesday, March 6, 2001

        Time:   4pm -

        Location:   TCSEQ 201 [look for it in a campus map][new]

      Professor Lawrence Hall
      Department of Physics, University of California, Berkeley
      
      Mass From Extra Dimensions of Space.
      
      The electromagnetic and weak interactions are based on a SU(2) X U(1) 
      gauge symmetry. If this symmetry were unbroken, the weak interactions 
      would have a long range and all the known elementary particles would be 
      massless. What is the physical mechanism which breaks this symmetry, 
      giving mass to the quarks, leptons and weak gauge bosons? 
      It is remarkable that such a crucial feature of particle physics 
      remains unknown.
      
      A new proposal is presented in which the weak symmetry is broken 
      by the propagation of quarks in a fifth dimension of size 10^-3 fm, 
      or 1/(300 GeV). In the standard model of particle physics, 
      weak symmetry breaking gives rise to a Higgs particle with a mass 
      which is not predicted and is highly sensitive to unknown UV quantum 
      corrections.  Although higher dimensional theories are notorious for 
      their divergent behaviour, our new proposal leads to a Higgs boson 
      mass which is finite and calculable; 127 +- 8 GeV in a particular model. 
      Planned collider experiments will resolve distances of 10^-3 fm, 
      and the signatures of these extra dimensions will be discussed.

       Event history: Submitted by judymeo on 26-Feb-2001;


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