Yes, it is true that colliding two particles in empty space can lead to the creation of additional particles. This phenomenon is a result of the principles of quantum field theory.
According to quantum field theory, particles are not considered as discrete objects moving through space but rather as excitations or fluctuations in underlying fields. These fields permeate all of space, even in seemingly empty regions. When particles interact, they can exchange energy and momentum, which can give rise to the creation or annihilation of other particles.
In the context of particle collisions, the energy and momentum of the colliding particles can be converted into the creation of new particles. This process is governed by the laws of conservation of energy and momentum. The newly created particles emerge from the available energy, and their properties depend on the specific conditions of the collision, such as the energies involved and the types of particles interacting.
These spontaneous creations of particles are commonly observed in high-energy physics experiments, such as those conducted in particle accelerators like the Large Hadron Collider (LHC). By accelerating particles to extremely high energies and colliding them together, scientists can study the fundamental properties of matter and explore the nature of the universe.
It's important to note that this phenomenon occurs within the framework of quantum mechanics, which introduces probabilistic behavior at the microscopic level. The creation of additional particles in a collision is described by quantum field theory's mathematical formalism, which takes into account the probabilities of various outcomes.