Heavy Hybrids from NRQCD

Details Heavy Hybrids from NRQCD Heavy Hybrids from NRQCD

1997-10-24

arxiv.org/abs/hep-lat/9710083v1

Phys.Rev.D57:3829-3832,1998

Physics

High Energy Physics

High Energy Physics - Lattice

9 pages, LaTeX2e, 2 figures, uses styles [11pt, a4wide, epsf]

Scientific paper

10.1103/PhysRevD.57.3829

We present a quenched lattice calculation for the lowest lying $b \bar b g$-hybrid states in the framework of NRQCD using the leading order Hamiltonian up to ${\cal O}(mv^2)$. We demonstrate the existence of a nearly degenerate rotational band of states with an excitation energy approximately 1.6 GeV above the $\Upsilon$ ground state. This lies around the $B \bar B_J^*$-threshold but well above the $B \bar B$-threshold. Therefore a heavy hybrid signal may well be detected if the centre-of-mass energy in B-factories is raised a few hundred MeV to coincide with other resonances above the 4S state. Our prediction is consistent with most phenomenological models and lattice calculations carried out in the static limit.

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