Changes between Version 1 and Version 2 of SpinTwo


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Timestamp:
04/06/12 16:32:51 (7 years ago)
Author:
trac
Comment:

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  • SpinTwo

    v1 v2  
    1212
    1313{{{
    14 
    1514#!latex
    1615$\Lambda = \overline{M_{pl}} \sim 2.4 \times 10^{18} GeV$
     
    3332Theory with D = 4 + 1 dimensions, in which the extra dimension is spatial and assumed to be compactified to be a torus with radius R. Here, the total space-time has a warped metric and the size of the extra dimension  can be at the order of the Planck length. Again, only spin-2 particles can propagate through 5 dimensions, therefore, a massive KK tower of spin-2 particles appear in 4 dimensions. They can interact with the SM fields with a strong coupling constant given by -1/Λ:
    3433{{{
    35 
    3634#!latex
    3735$\Lambda = \overline{M_{pl}} \, e^{kR\pi}$
     
    3937where k is a scale of order of the Planck scale. In this model, the mass of the nth spin-2 particle is given by:
    4038{{{
    41 
    4239#!latex
    4340$m_n = k \, x_n \, e^{-kR\pi}$
     
    6158The graviton is massless in this class of theories and its coupling to the SM particles is given by -1/Λ:
    6259{{{
    63 
    6460#!latex
    6561$\Lambda = \overline{M_{pl}}(\mu^{*}) \sim \mu^{*} \sim 1 \, TeV.$