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arXiv · 2604.04494

Multi-field oscillons/I-balls in the Friedberg-Lee-Sirlin model

Kai Murai·Tatsuya Ogawa·Fuminobu Takahashi
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Abstract

We study oscillon/I-ball solutions in a real scalar version of the Friedberg-Lee-Sirlin (FLS) model. Using the multiple-scale analysis, we derive the conditions for oscillon solutions and explore multi-field oscillon configurations. In these configurations, the two fields form co-located oscillons that oscillate with frequencies set by their respective masses. These multi-field oscillons can be viewed as a bound state of two oscillons due to attractive interactions between the fields. We confirm these analytical predictions through numerical lattice calculations. This work extends the standard picture of single-field oscillons and may be relevant for cosmological scenarios involving multiple interacting real scalar fields.

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Kai Murai, Tatsuya Ogawa, Fuminobu Takahashi. 2026-04-06. Multi-field oscillons/I-balls in the Friedberg-Lee-Sirlin model. https://doi.org/10.1103/gslh-lb7k

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