Abstract
In this paper we study the role of the 5D Gauss-Bonnet corrections and two loop higher genus contribution to the gravity action in type IIB string theory inspired low energy supergravity theory in the light of gravidilatonic interactions on the lightest Kaluza-Klein graviton mass spectrum. From the latest constraints on the lightest Kaluza-Klein graviton mass as obtained from the ATLAS dilepton search in 7 TeV proton-proton collision, we have shown that due to the presence of Gauss-Bonnet and string loop corrections, the warping solution in an ${\bf AdS_{5}}$ bulk is quite distinct from Randall-Sundrum scenario. We discuss the constraints on the model parameters to fit with present ATLAS data.
Highlights
In this work we have first explored the phenomenological features of string modified warped geometry in the presence of 5D Gauss–Bonnet coupling and gravidilaton coupling in a 5D bulk
We show the present status of the lower limit of the lightest Kaluza–Klein graviton mass for the Large Hadron Collider (LHC) ATLAS dilepton search by the green curve in
We show the present status of the allowed region for the lower limit of the lightest Kaluza–Klein graviton mass for the LHC ATLAS dilepton search by the yellow shaded region bounded by the black colored line drawn for Randall– Sundrum (RS) = 0.10 and RS = 0.01, respectively
Summary
Lower limit of the lightest KK graviton mass from the LHC ATLAS dilepton search (within 5σ C.L.). For numerical estimations we take the dilation couplings θ1, θ2 to be small to keep them within the perturbative regime of the solution and we set the arbitrary integration constants c1, c2 to a desired value for which the dimensionless exponents of the dilaton factors are fixed at lim e−χ1 = lim eχ2 = e11. Such a value of the dimensionless exponent of the dilaton factor produces a large enhancement even for a small value of the dilaton coupling parameters θ1, θ2 and moderate values for φ(0) and φ(π ).
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