Tachyon inflation in an AdS braneworld with backreaction (CROSBI ID 251843)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Bilić, Neven ; Dimitrijevic, Dragoljub D. ; Djordjevic, Goran S. ; Milosevic, Milan
engleski
Tachyon inflation in an AdS braneworld with backreaction
We analyze the inflationary scenario based on the tachyon field coupled with the radion of the second Randall–Sundrum model (RSII). The tachyon Lagrangian is derived from the dynamics of a 3-brane moving in the five-dimensional bulk. The AdS5 geometry of the bulk is extended to include the radion. Using the Hamiltonian formalism we find four nonlinear field equations supplemented by the modified Friedmann equations of the RSII braneworld cosmology. After a suitable rescaling we reduce the parameters of our model to only one free parameter related to the brane tension and the AdS5 curvature. We solve the equations numerically assuming a reasonably wide range of initial conditions determined by physical considerations. Varying the free parameter and initial conditions we confront our results with the Planck 2015 data.
DBI Lagrangians ; tachyon cosmology
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Podaci o izdanju
32 (5)
2017.
1750039
20
objavljeno
0217-751X
1793-656X
10.1142/S0217751X17500397