Numerical study of Q-ball formation in gravity mediation

Takashi Hiramatsu; Masahiro Kawasaki; Fuminobu Takahashi

doi:10.1088/1475-7516/2010/06/008

Numerical study of Q-ball formation in gravity mediation

Takashi Hiramatsu, Masahiro Kawasaki, Fuminobu Takahashi

Research output: Contribution to journal › Article › peer-review

53 Citations (Scopus)

Abstract

We study Q-ball formation in the expanding universe on 1D, 2D and 3D lattice simulations. We obtain detailed Q-ball charge distributions, and find that the distribution is peaked at Q^3D_peak ≈ 1.9 × 10^-2(|Φ_in|/m)², which is greater than the existing result by about 60%. Based on the numerical simulations, we discuss how the Q-ball formation proceeds. Also we make a comment on possible deviation of the charge distributions from what was conjectured in the past.

Original language	English
Article number	008
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2010
Issue number	6
DOIs	https://doi.org/10.1088/1475-7516/2010/06/008
Publication status	Published - 2010
Externally published	Yes

Keywords

cosmology of theories beyond the SM
physics of the early universe
supersymmetry and cosmology

ASJC Scopus subject areas

Astronomy and Astrophysics

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AB - We study Q-ball formation in the expanding universe on 1D, 2D and 3D lattice simulations. We obtain detailed Q-ball charge distributions, and find that the distribution is peaked at Q3Dpeak ≈ 1.9 × 10-2(|Φin|/m)2, which is greater than the existing result by about 60%. Based on the numerical simulations, we discuss how the Q-ball formation proceeds. Also we make a comment on possible deviation of the charge distributions from what was conjectured in the past.

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