One issue with this framework revolves around that a certain two forces are approximately 30 orders of magnitude apart and is a hierarchy problem.  
One issue with this framework revolves around that a certain two forces are approximately 30 orders of magnitude apart and is a hierarchy problem.  In 2001, SNOLAB obtained evidence that the Sun was emitting a sufficient number of three types of particle to confirm the predictions of this framework.  The issue of CP-symmetry violation is another source of problems in this framework, which string theory attempts to unify with gravity and general relativity.  Validation of this model could be helped by the confirmation of a certain object in addition to the already verifed bottom and top quarks and tau neutrino.  The confirmation of the Higgs Boson's existence would complete the set of particles predicted by, for 10 points, what widely agreed-upon model in particle physics?
One issue with this framework revolves around that a certain two forces are approximately 30 orders of magnitude apart and is a hierarchy problem.  
{Standard} Model