Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-04-24
Phys.Rev.D75:107302,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex, 4 pages, accepted for publication in Phys.Rev.D
Scientific paper
10.1103/PhysRevD.75.107302
Assisted chaotic inflation in brane cosmology is discussed. We work in the framework of Randall-Sundrum (RS) II model, in which adopting the RS condition the only parameter is the five-dimensional Planck mass. Using the scalar spectral index and the amplitude of scalar perturbations we determine both the mass of the scalar fields responsible for inflation and the fundamental Planck mass of the higher-dimensional theory. We find that the mass of the scalars has the typical value of the inflaton mass in chaotic inflation ($M_I \sim 10^{13}$ GeV) and that the five-dimensional Planck mass is very close to the GUT (Grand Unified Theories) scale ($M_5 \sim (10^{16}-10^{17})$ GeV). Furthermore, no matter how many scalar fields we use it is not possible to have chaotic inflation with field values below the fundamental Planck mass.
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