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Inflaton fragmentation in E-models of cosmological α-attractors

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arxiv 1710.07487 v2 pith:CFIN32US submitted 2017-10-20 astro-ph.CO hep-ph

Inflaton fragmentation in E-models of cosmological α-attractors

Fuminori Hasegawa , Jeong-Pyong Hong This is my paper
classification astro-ph.CO hep-ph
keywords alphaattractorsinflatoncosmologicale-modelsflatnessi-ballsnegative
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Cosmological $\alpha$-attractors are observationally favored due to the asymptotic flatness of the potential. Since its flatness induces the negative pressure even after inflation, the coherent oscillation of the inflaton field could fragment into quasi-stable localized objects called I-balls (or "oscillons"). We investigated the possibility of I-ball formation in E-models of $\alpha$-attractors. Using linear analysis and the lattice simulations, we find that for $\alpha\lesssim10^{-3}$, the inflaton feels the negative pressure long enough and actually fragments into I-balls.

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Cited by 3 Pith papers

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