(February 29, 2016 at 4:21 pm)Alex K Wrote:(February 29, 2016 at 2:13 pm)Harris Wrote: We should not overlook a simple fact:It's not quite that simple. They weren't "put in" to calculate interactions, they are a result of the same theory which describes the "real particles". But let me ask you: how do you detect a "real particle"?
When particles collide nearly at the speed of light in Large Hadron Collider they burst into clouds full of exotic subatomic particles. All those subatomic particles have physical properties which made them detectable.
However, virtual particles are not detectable by any mean and for that reason in the world of physics they are called “virtual.” They are mathematical objects which scientists have invented for the purpose of calculations of interactions between real particles
I think this lecture would give anyone a good understanding about what particles are and how they can be detected. Please note, throughout the lecture you will not hear anything about virtual particles.
https://www.youtube.com/watch?v=Q944yL8wSFE