The fact that the bosons of the weak force have mass is something that I think technically poses many problems.
To avoid this and other problems with the masses of the particles devised a mechanism within the standart model $SM$ of particle physics $"smpf"$ called "the Higgs field." This field is transmitted by a boson and the passage of particles interacting with him for the generated field causes an inertia that is what we perceive as "mass". The Higgs mechanism is accepted as part of SMPF, but can not be verified until we find the corresponding Higgs boson in a particle accelerator.
Higgs boson we think we know that its mass is between $115 Gev$ and $200 Gev$, so it is expected to locate in the new collider at CERN: the LHC (Large Hadron Collider). As it is believed, has not been able to fit the force of gravity with quantum mechanics. A partial unification of the force would be the existence of a boson which would transmit the gravitational force, which we call graviton. If there was such a graviton. The graviton would be a hypothetical particle that many physicists believe.
The $smpf$ presents the problem that for the 20 core values to build a coherent theory need a very fine adjustment. String theory and other developments raise the possibility that this model is part of a collection larger particles called supersymmetry. If supersymmetry were valid, this would require fine-tuning the values of the particles. Supersymmetry is the existence of a correspondence between fermions and bosons in the that every fermion has a boson superpartner similar characteristics, and each one boson fermion superpartner.
The problem is that the fermions and bosons we know there is neither a single case of correspondence. That is, if supersymmetry is correct, we should still find the superpartners of all particles in the model. The hypothetical fermions superpartners of bosons be called photino, winos, gluinos, etc.. And the superpartners of fermions bosons be called Selectron, sneutrino, squark, etc.. Is it possible perhaps that the existence of these superpartners dramatically change the established concept of the standard model and open the door to a group of new models that do not understand, or hardly understand?