What is the formal definition of an event? According to Wikipedia, "an event is a point in spacetime (that is, a specific place and time) and the physical situation or occurrence associated with it." This definition seems too large because it includes even points where no identifiable process is happening.
On the other hand, what about particle-fields interaction:
- a comet passing through the gravitation field of the Sun
- a collision between two particles where one particle is entering the field of another particle and then bouncing off in a parabolic worldline (deceleration & acceleration).
In both cases a field is continuously acting on an object, thus the event itself seems to be somewhat continuous.
Can someone provide a formal definition which is taking into account particle-fields interaction? Do continuous events exist?
Edit: The Wikipedia definition (which also might be found in textbooks) is inacceptable for a particular reason: Events (such as a particle collision) have somewhat observer-independent character, i.e.all observers agree on the fact that an event happened, even if they disagree on the time & the simultaneity of the event. In contrast, we cannot say that observers agree on any "point in spacetime".
=> A sufficient answer would be a good reference for what @By Symmetry wrote.