期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 5, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP05(2016)095
关键词
Cosmology of Theories beyond the SM; D-branes; Supersymmetric Effective Theories; Compactification and String Models
资金
- MINECO [FPA2012-32828]
- ERC Advanced Grant SPLE [ERC-2012-ADG-20120216-320421]
- grant of the Centro de Excelencia Severo Ochoa Programme [SEV-2012-0249]
- Max Planck Society
In string theory compactifications it is common to find an effective Lagrangian for the scalar fields with a non-canonical kinetic term. We study the effective action of the scalar position moduli of Type II Dp-branes. In many instances the kinetic terms are in fact modified by a term proportional to the scalar potential itself. This can be linked to the appearance of higher-dimensional supersymmetric operators correcting the Kahler potential. We identify the supersymmetric dimension-eight operators describing the alpha' corrections captured by the D-brane Dirac-Born-Infeld action. Our analysis then allows an embedding of the D-brane moduli effective action into an N = 1 supergravity formulation. The effects of the potential-dependent kinetic terms may be very important if one of the scalars is the inflaton, since they lead to a flattening of the scalar potential. We analyze this flattening effect in detail and compute its impact on the CMB observables for single-field inflation with monomial potentials.
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