Chiral fermions can (presumably) be constructed by introducing two regulators, one for the gauge fields (e.g. a lattice), and another for the fermion functional integrals in a fixed (regulated) gauge field. This talk discusses cutoff effects arising from the regulator of the fermions.

The recent failure of the scenario which uses only 10, 126 Higgs multiplets to yield large enough neutrino masses in the SO(10) MSGUT motivates an alternative scenario[1] where the 120 -plet collaborates with the 10 -plet to fit the dominant charged fermion masses. The small 126 -plet couplings give appreciable contributions only to light charged fermion masses and enhance the Type I seesaw mas...

We investigate the generalized supersymmetric t− J model with boundary impurities in different gradings. All three different gradings: fermion, fermion, boson (FFB), boson, fermion, fermion (BFF) and fermion, boson, fermion (FBF), are studied for the generalized supersymmetric t − J model. Boundary K-matrix operators are found for the different gradings. By using the graded algebraic Bethe ansa...