Spin-half bosons with mass dimension three half: towards a resolution of the cosmological constant problem.

We have constructed a very different type of particle than any presently known. It is a boson and resides in the $(1/2,0)\oplus(0,1/2)$ representation space. The associated local field has mass dimension three half. These new bosons can only be created or destroyed in pairs. When paired with a fermion the total zero point energy of the boson-fermion system identically vanishes. This communication presents the new quantum field theoretic construct.