We discuss the allowed decays of a hybrid meson in the heavy quark limit. We deduce that an important decay will be into a heavy quark non-hybrid state and a light quark meson, in other words, the de-excitation of an excited gluonic string by emission of a light quark-antiquark pair. We discuss the study of hadronic decays from the lattice in the heavy quark limit and apply this approach to explore the transitions from a spin-exotic hybrid to $\chi_b \eta$ and $\chi_b S$ where $S$ is a scalar meson. We obtain a signal for the transition emitting a scalar meson and we discuss the phenomenological implications
The potential between two heavy-light mesons as a function of the heavy quark
separation is calculated in quenched SU(3) lattice QCD. We study the case of
heavy-light mesons with a static heavy quark and light quarks of mass close to
the strange quark mass. We explore the case of light quarks with the same and
with different flavours, classified according to the light quark isospin. We
evaluate the appropriate light quark exchange contributions and explore the
spin-dependence of the interaction. Comparison is made with meson exchange.Comment: 31 pages, 10 figures; error bars in Fig. 2 corrected (now smaller
A potential model for four interacting quarks is constructed in SU(2) from six basis states -the three partitions into quark pairs, where the gluon field is either in its ground state or first excited state. With four independent parameters to describe the interactions connecting these basis states, it is possible to fit 100 pieces of data -the ground and first excited states of configurations from six different four-quark geometries calculated on a 16 3 × 32 lattice.
The spatial distribution of the action and energy in the colour fields of flux-tubes is studied in lattice SU (2) field theory for static quarks at separations up to 1 fm at β = 2.4, 2.5. The ground and excited states of the colour fields are considered. Sum rules are used to get estimates of generalised β-functions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.