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Some features of processes with gauge bosons in models with large extra dimensions

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Some features of processes with gauge bosons in models with large extra dimensions E.E. Boos, M.A. Perfilov, M.N. Smolyakov, I.P. Volobuev Skobeltsyn Institute of ... – PowerPoint PPT presentation

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Title: Some features of processes with gauge bosons in models with large extra dimensions


1
Some features of processes with gauge bosons in
models with large extra dimensions
  • E.E. Boos, M.A. Perfilov,
  • M.N. Smolyakov, I.P. Volobuev

Skobeltsyn Institute of Nuclear Physics, Moscow
State University
2
  • Models with large extra dimensions
  • ADD scenario
  • small mass gaps between KK-modes
  • Randall-Sundrum model
  • large mass gaps between KK-modes

3
KK decomposition
SM current
4
Effective action
- tensor structure of the propagator with p0
5
Effective contact interactions
- Effective coupling constant
6
The interference
7
Gravity in the bulk, stabilized RS
E.E. Boos, V.E. Bunichev, M.N. Smolyakov, I.P.
Volobuev Phys. Rev. D 79 (2009) 104013
8
Bulk gauge fields in RS model
H. Davoudiasl, J.L. Hewett, T.G. Rizzo, Phys.
Lett. B 473 (2000) 43
9
Symbolic and numerical computations, including
simulations of the SM background for LHC, have
been performed by means of the CompHEP package.
The corresponding Feynman rules have been
implemented into this version of the CompHEP.
10
Single-top production
11
TeV,
GeV
TeV,
12
TeV,
GeV
TeV,
13
TeV,
GeV
TeV,
14
TeV,
GeV
TeV,
15
Drell-Yan processes
16
(TeV)
17
(TeV)
18
(TeV)
19
(TeV)
20
Conclusion
  • The KK modes should be taken into account because
    they can make contribution to the amplitudes of
    the corresponding processes
  • Single W or Z can also provide analogous
    effect, but
  • Simultaneous effects with KK gravitons and W, Z
    KK modes can be interpreted in favor of the
    existence of extra dimensions
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