Critical nature of non-Fermi liquid in spin 3/2 multipolar Kondo model

A multipolar Kondo model of an impurity spin S-I = 3/2 interacting with conduction electrons with spin s(c) = 3/2 is investigated using boundary conformal field theory. A two-channel Kondo (2CK)-like non-Fermi liquid (NFL) under the particle-hole symmetry is derived explicitly using a "superspin absorption" in the sector of a hidden syrnmetry, SO(5). We discuss the difference between the usual spin-1/2 2CK NFL fixed point and the present one. In particular, we find that, unlike the usual 2CK model, the low temperature impurity specific heat is proportional to temperature.