TY - JOUR
T1 - Adiabatic and isocurvature fluctuations of Affleck-Dine field in D-term inflation model
AU - Kawasaki, Masahiro
AU - Takahashi, Fuminobu
N1 - Funding Information:
We thank Masahide Yamaguchi and Tsutomu Yanagida for useful discussion. This work is supported by the Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports, and Culture of Japan, Priority Area “Supersymmetry and Unified Theory of Elementary Particles” (No. 707).
PY - 2001/9/20
Y1 - 2001/9/20
N2 - We reconsider fluctuations of Affleck-Dine (AD) field in a D-term inflation model. Contrary to the previous analysis, we find that the spectrum of the adiabatic fluctuations is almost scale invariant even if the AD field has a large initial value. Furthermore, we study the isocurvature fluctuations of the AD field and estimate the ratio of the isocurvature to adiabatic power spectrum. The dynamics of the inflaton and AD fields sets the upper bound for the value of the AD field, leading to a lower limit for isocurvature perturbation. It is shown that the recent cosmic microwave background data give a constraint on the D-term inflation and the AD field.
AB - We reconsider fluctuations of Affleck-Dine (AD) field in a D-term inflation model. Contrary to the previous analysis, we find that the spectrum of the adiabatic fluctuations is almost scale invariant even if the AD field has a large initial value. Furthermore, we study the isocurvature fluctuations of the AD field and estimate the ratio of the isocurvature to adiabatic power spectrum. The dynamics of the inflaton and AD fields sets the upper bound for the value of the AD field, leading to a lower limit for isocurvature perturbation. It is shown that the recent cosmic microwave background data give a constraint on the D-term inflation and the AD field.
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U2 - 10.1016/S0370-2693(01)00957-1
DO - 10.1016/S0370-2693(01)00957-1
M3 - Article
AN - SCOPUS:0035922398
VL - 516
SP - 388
EP - 394
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 3-4
ER -