0 Members and 1 Guest are viewing this topic.
I've been reading about particle colliders and how very high energies are needed to create certain types of particle. I just about understand the physics behind that but what I don't understand is how are they created in the natural world.For instance, the book I'm currently reading states that energy as high as 1019GeV could be needed to create a graviton. But gravity is all around us which means that gravitons must exist anyway. So how are they created naturally if such enormous energies are required?
Simple! they were created in the big bang when such energies were commonplace and enough time has not yet elapsed for them to decay.
I have always understood that if Gravitons exist they are of very low mass (I have seen the figure of 10^-11 times that of the neutrino quoted in an 'Scientific American' article).I would be interested to know the source of this high mass figure.I think the term observable might be the clue here.
The required energies are because you need to get the particles close enough together against their electrical charges to experience a gravitiational action. Remember that the only particles that we can control and accelerate and observe easily are charged ones. This tends to skew the image of what is going on.
This reinforces what I have read that it will never be possible to observe individual Gravitons although effects en-mass are all too obvious