Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Supergravity Modification of D-term Hybrid Inflation: Solving the Cosmic String and Spectral Index Problem via a Right-Handed Sneutrino.
AU - McDonald, John
AU - Lin, C. M.
N1 - One of the first papers to discuss the implications for inflation models of the latest 3-year WMAP CMB observations. It has generated new research on SUSY inflation models and cosmic strings. Basis of a new RTN collaboration with the Helsinki Institute of Physics (Ferrantelli and Enqvist). 14 citations (SPIRES). RAE_import_type : Journal article RAE_uoa_type : Physics
PY - 2006/9/1
Y1 - 2006/9/1
N2 - Supergravity corrections due to the energy density of a right-handed sneutrino can generate a negative mass squared for the inflaton, flattening the inflaton potential and reducing the spectral index and inflaton energy density. For the case of D-term hybrid inflation, we show that the spectral index can be lowered from the conventional value n=0.98 to a value within the range favored by the latest WMAP analysis, n=0.951-0.019+0.015. The modified energy density is consistent with nonobservation of cosmic strings in the CMB if n<0.946. The WMAP lower bound on the spectral index implies that the D-term cosmic string contribution may be very close present CMB limits, contributing at least 5% to the CMB multipoles.
AB - Supergravity corrections due to the energy density of a right-handed sneutrino can generate a negative mass squared for the inflaton, flattening the inflaton potential and reducing the spectral index and inflaton energy density. For the case of D-term hybrid inflation, we show that the spectral index can be lowered from the conventional value n=0.98 to a value within the range favored by the latest WMAP analysis, n=0.951-0.019+0.015. The modified energy density is consistent with nonobservation of cosmic strings in the CMB if n<0.946. The WMAP lower bound on the spectral index implies that the D-term cosmic string contribution may be very close present CMB limits, contributing at least 5% to the CMB multipoles.
U2 - 10.1103/PhysRevD.74.063510
DO - 10.1103/PhysRevD.74.063510
M3 - Journal article
VL - 74
SP - 063510
JO - Physical Review D
JF - Physical Review D
SN - 1550-2368
IS - 6
ER -