The concept of antiparticles and their behavior in other universes is largely speculative and falls within the realm of theoretical physics and hypothetical scenarios. Our current understanding of particle physics is based on the framework of the Standard Model, which describes the behavior of particles and their antiparticles in our universe.
In the Standard Model, antiparticles are typically thought to decay into normal matter and energy in the same way that particles decay into their respective antiparticles. However, the behavior of particles and antiparticles in other universes, if they exist, is purely hypothetical and beyond our current knowledge.
The existence of other universes is a topic explored in theories such as string theory and the multiverse hypothesis. These theories suggest the possibility of multiple universes with different physical laws and properties. However, the specific behavior of particles and antiparticles in these alternate universes would depend on the particular set of physical laws governing those universes, which we do not currently have empirical evidence for.
It's important to note that speculative ideas about other universes and their properties are highly theoretical and subject to ongoing research and debate. As our understanding of fundamental physics evolves, scientists may develop new theories or gather experimental evidence that sheds light on these intriguing questions.