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Paper   IPM / Particles / 12146
School of Particles and Accelerator
  Title:   Constraints on Randall-Sundrum model from top-antitop production at the LHC
  Author(s): 
1.  Seyed Yaser Ayazi
2.  Mojtaba Mohammadi Najafabadi
  Status:   Published
  Journal: JHEP
  Year:  2012
  Supported by:  IPM
  Abstract:
We study the top pair production cross section at the LHC in the context of Randall-Sundrum model including the Kaluza-Klein (KK) excited gravitons. It is shown that new measurement of cross section of this process at the LHC restricts parameter space in Randall-Sundrum (RS) model considerably. We show that the coupling parameter (k-Mpl)is excluded by this measurement above the value of 0.2. We also study the effect of KK excitations on the spin correlation of the top pairs. It is shown that the spin asymmetry in tt- events is sensitive to the RS model parameters

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