"Physicists at the Stanford Linear Accelerator Center (SLAC) in California have succeeded in producing particles of matter from very energetic collisions of light."

I havent read this yet but I speculate that the particles that were produced were already there in another form of matter.

you cannot create matter all that is here has always been here in some form or another.

I think I will wait on this one and see what the final report says in instance.

it may be that , and this is just my opinion or conjecture , that the light used borrowed matter from the device itself.

you cannot create energy or matter or anything.
you may only change its various forms.
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3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.