Unexpected results are sometimes great for science. IF the machine is not broken, IF it works, then to have an unexpected result could turn out to be
an amazing break through.
String theory gets complicated. There are 11 dimensions and mass and energy jump around and influence stuff, all the while keeping a constant amount
of mass and energy in our own 3 (or 4) dimensional universe. The point?
Each of all of the galaxies have a black hole at the center. They consume mass and energy constantly. They spit some back out, but where does
everything go? Some say black holes are attached to white holes, some say other things. What string theory allows for (as far as I understand it) is
that all the while that our universe is losing mass and energy, we are at the same time receiving mass and energy through this interdimensional dance.
(Note: string theory does not mention beings, sentient or otherwise dwelling in these other dimensions.
So it could be that the particles moving toward the speed of light, just as they do in a black hole, "jump" dimensionally. It may have appeared to
never have existed, or to have dissapeared to us, but it may have found a new home elsewhere. And in turn our universe would have also welcomed a new
particle of equal mass/energy.