According to the theory of relativity, as an object with mass approaches the speed of light, its relativistic mass increases. This increase in mass is often referred to as "apparent mass" or "relativistic mass." It's important to note that the concept of relativistic mass is an older interpretation of the theory of relativity and is not commonly used in modern physics.
In the context of the Higgs field, the Higgs mechanism is responsible for providing particles with mass. The Higgs field permeates throughout space, and particles interact with it, acquiring mass in the process. This mechanism explains the origin of rest mass, which is the mass an object possesses when it is at rest.
When an object accelerates close to the speed of light, its kinetic energy increases, and according to the theory of relativity, this increase in energy contributes to the apparent mass of the object. It is not that the object is acquiring additional mass from the Higgs field or any other source. Rather, the increase in apparent mass is a consequence of the object's energy content.
As an object accelerates, its energy and momentum increase, resulting in an increase in its relativistic mass. This effect becomes more significant as the object approaches the speed of light. However, it's important to emphasize that the concept of relativistic mass is not commonly used in modern physics, as it can lead to confusion. Instead, modern formulations of physics tend to focus on the concepts of energy, momentum, and the rest mass of particles.