Gravitation, or the force of gravity, is a fundamental force of nature that acts between objects with mass or energy. At the particle level, particles with mass do experience and interact with gravity.
According to our current understanding of physics, gravity is described by the theory of general relativity, which explains gravity as the curvature of spacetime caused by mass and energy. In this framework, particles with mass create a curvature in the fabric of spacetime, and other particles moving through this curved spacetime are affected by this curvature, experiencing the force we call gravity.
However, it is important to note that the nature of gravity is still an active area of research, especially when it comes to reconciling it with quantum mechanics, which describes the behavior of particles on very small scales. The current theories of gravity, including general relativity, have been highly successful in describing the force of gravity on macroscopic scales, such as the motion of planets and galaxies. But at the quantum level, where particles are very small and exhibit quantum behavior, the understanding of gravity becomes less clear.
The search for a theory of quantum gravity is an ongoing endeavor in theoretical physics. Various approaches, such as string theory, loop quantum gravity, and others, aim to provide a consistent framework that combines both quantum mechanics and gravity. These theories seek to explain how gravity operates at the particle level and how it can be reconciled with the other fundamental forces of nature.
In summary, while gravity is known to exist and affect particles with mass, understanding its behavior at the quantum level is still an active area of research and the subject of ongoing scientific exploration.