Shocked jets in CCSNe can power the zoo of fast blue optical transients

Evidence is mounting that recent multiwavelength detections of fast blue optical transients (FBOTs) in star-forming galaxies comprise a new class transients, whose origin yet to be understood. We show hydrogen-rich collapsing stars launch relativistic jets near the central engine can naturally explain entire set FBOT observables. The jet-star interaction forms mildly-relativistic shocked jet (inner cocoon) component, which powers cooling emission dominates high velocity signal during first few weeks, with typical energy $ \sim 10^{50}-10^{51} erg. During this time, cocoon radial distribution implies lightcurve exhibits decay L \propto t^{-2.4} $. After when emitting shell 0.01 c, becomes transparent, and envelope governs emission. between dense circumstellar winds generates synchrotron self-absorbed radio bands, featuring steady rise on month timescale. months outflow decelerates, enters observer's line sight, peak lightcurve, rapidly decays thereafter. (and inner become optically thin X-rays day after collapse, allowing X-ray photons diffuse from launched observer. Cocoon expected at higher volumetric rates than gamma-ray bursts (GRBs) by factor few, similar FBOTs. rule out uncollimated outflows, however both GRB failed collimated are compatible all