Dharam Vir Ahluwalia Spin-half bosons with mass dimension three half: towards a resolution of the cosmological constant problem (440K, pdf) ABSTRACT. We have constructed a very different type of particle than any presently known. It is a boson and resides in the (1/2,0)+(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.