Chaotic Inflation from the MSSM Along Flat $D$-Term Trajectory

Abstract

Within the MSSM we propose the chaotic inflationary scenario in which the inflaton field is a combination of sleptons and the Higgs field states evolving along the $D$-term flat direction. In the inflation and postinflation reheating processes, a decisive role is played by the MSSM Yukawa superpotential. The vacuum energy during the inflationary era is mainly from the muonic Yukawa coupling, while the inflaton decay and subsequent reheating process dominantly proceeds due to the strange quark Yukawa term. Because of these, the presented scenario is predictive and the results obtained agree well with cosmological observations. In particular, the scalar spectral index and the tensor-to-scalar ratio are respectively, $n_s\simeq 0.966$ and $r=0.00117$. The reheating temperature is found to be $T_r\simeq 7.2\times 10^7$ GeV.

Matched to Phys. Rev. D version

References in corpus (5)

• Gauge invariant MSSM inflaton
• Revisiting Big-Bang Nucleosynthesis Constraints on Long-Lived Decaying Particles
• Hamilton's approach in cosmological inflation with an exponential potential and its observational constraints
• Seven-Disk Manifold, alpha-attractors and B-modes
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Cited by in corpus (1)

• Higgs-Squark-Slepton Inflation from the MSSM