Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Modular inflation and the orthogonal axion as curvaton.
AU - Dimopoulos, Konstantinos
AU - Lazarides, George
PY - 2006/1/15
Y1 - 2006/1/15
N2 - We study a particular supersymmetric realization of the Peccei-Quinn symmetry which provides a suitable candidate for the curvaton field. The class of models considered also solves the µ problem, while generating the Peccei-Quinn scale dynamically. The curvaton candidate is a pseudo-Nambu-Goldstone boson corresponding to an angular degree of freedom orthogonal to the axion field. Its order parameter increases substantially following a phase transition during inflation. This results in a drastic amplification of the curvaton perturbations. Consequently, the mechanism is able to accommodate low-scale inflation with Hubble parameter at the TeV scale. Hence, we investigate modular inflation using a string axion field as the inflaton with inflation scale determined by gravity mediated soft supersymmetry breaking. We find that modular inflation with the orthogonal axion as curvaton can indeed account for the observations for natural values of the parameters.
AB - We study a particular supersymmetric realization of the Peccei-Quinn symmetry which provides a suitable candidate for the curvaton field. The class of models considered also solves the µ problem, while generating the Peccei-Quinn scale dynamically. The curvaton candidate is a pseudo-Nambu-Goldstone boson corresponding to an angular degree of freedom orthogonal to the axion field. Its order parameter increases substantially following a phase transition during inflation. This results in a drastic amplification of the curvaton perturbations. Consequently, the mechanism is able to accommodate low-scale inflation with Hubble parameter at the TeV scale. Hence, we investigate modular inflation using a string axion field as the inflaton with inflation scale determined by gravity mediated soft supersymmetry breaking. We find that modular inflation with the orthogonal axion as curvaton can indeed account for the observations for natural values of the parameters.
KW - cosmology
KW - supersymmetric field theory
KW - string theory
KW - spontaneous symmetry breaking
KW - axions
KW - supersymmetry
U2 - 10.1103/PhysRevD.73.023525
DO - 10.1103/PhysRevD.73.023525
M3 - Journal article
VL - 73
JO - Physical Review D
JF - Physical Review D
SN - 1550-7998
IS - 2
M1 - 023525
ER -