The interactions between real particles involve the appearance and disappearance of virtual particles. In these processes, both real and virtual particles can emerge and vanish, yet the interactions always ensure that properties like momentum and charge remain conserved. Therefore, what you should expect to persist are not the particles themselves, but the conserved properties that define them.
The interactions between real particles involve the appearance and disappearance of virtual particles. In these processes, both real and virtual particles can emerge and vanish, yet the interactions always ensure that properties like momentum and charge remain conserved. Therefore, what you should expect to persist are not the particles themselves, but the conserved properties that define them.