Misalignment production of isotropized vector dark matter?
arXiv:2607.14267
The paper studies how a multi‑vector dark matter condensate can be produced via the misalignment mechanism during inflation, using isotropized background fields to avoid anisotropy constraints, and finds that non‑Gaussianity and isocurvature limits are mutually incompatible.
Abstract
We present dark matter production by the misalignment mechanism of a multi-vector condensate through kinetic coupling during inflation. We impose isotropized background vector fields to release the model from the stringent constraint of anisotropy. However, it turns out that the constraints imposed by non-Gaussianity and isocurvature fluctuations are incompatible with each other, regardless of whether the fluctuations are in the weak-mixing or strong-mixing regime.
10 pages, 4 figures