Exotic to standard bottomonium transitions

We study the transition widths of (10753) and (11020) into standard bottomonium under the hypothesis that they correspond to the two lowest laying 1^-- hybrid bottomonium states. We employ weakly coupled potential NRQCD an effective field theory incorporating the heavy-quark and multipole expansions. We consider the transitions generated by the leading order and next-to-leading order singlet-octet operators. In the multipole expansion the heavy-quark matrix elements factorize from the production of light-quark mesons by gluonic operators. For the leading order operator we compute the widths with a single ^0, or ^' in the final state and for the next-to-leading operator for ^+^- or K^+K^-. The hadronization of the gluonic operators is obtained, in the first case, from the axial anomaly and a standard ^0--^' mixing scheme and, in the second case, we employ a coupled-channel dispersive representation matched to chiral perturbation theory for both the S- and D-wave pieces of the gluonic operator. We compare with experimental values and semi-inclusive widths. Our results strongly suggest that (11020) is indeed a hybrid bottomonium state.