HEAVY HYBRID STATES FROM NRQCD

We present a quenched lattice calculation for the lowest lying <b(b)ov er bar>g-hybrid states in the framework of NRQCD using the leading ord er Hamiltonian up to O(m upsilon(2)). We demonstrate the existence of a nearly degenerate rotational band of states with an excitation energ y approximately 1.6 GeV above the Y ground state. This lies around the <B(B)over bar>(j)-threshold, but well above the <B(B)over bar>-thres hold. Therefore a heavy hybrid signal may well be detected if the cent er-of-mass energy in B-factories is raised a few hundred MeV to coinci de with other resonances above the 4S state. Our prediction is consist ent with most phenomenological models and lattice calculations carried out in the static limit. [S0556-2821(98)50707-2].