The concept of antimatter particles going backward in time is often associated with the notion of "antiparticles." Antiparticles are counterparts to ordinary matter particles, carrying the opposite charge. For example, the antiparticle of an electron is called a positron, which has a positive charge.
The idea that antimatter particles might travel backward in time is based on certain interpretations of quantum mechanics, such as the Feynman-Stueckelberg interpretation. According to this interpretation, antiparticles can be seen as particles moving backward in time. This interpretation allows for a mathematical description of particle interactions that is consistent with observations.
However, it is important to note that the concept of antiparticles moving backward in time is a mathematical tool used to describe quantum interactions and not a literal backward movement in time as we commonly understand it. In practical terms, antiparticles still follow the same forward-moving trajectory through time as regular particles.
As for the verification of these ideas, it is challenging to directly observe or measure the movement of particles through time. The time directionality of particle interactions is deeply embedded in the fundamental structure of our universe, and it is not currently possible to experimentally manipulate or observe particles moving backward in time. Our understanding of time and particle physics is largely based on experimental evidence, theoretical models, and mathematical frameworks that describe and predict particle behavior.
While there are ongoing studies and experiments in particle physics, such as those conducted at CERN, they primarily focus on understanding the properties and interactions of particles in the framework of our current understanding. there is no conclusive experimental evidence that supports the direct observation of antimatter particles moving backward in time.