Abstract
Recently experimentalists have discovered several charged charmoniumlike hadrons with unconventional quark content . We perform a search for with mass below 4.2 GeV in the channel using lattice QCD. The major challenge is presented by the two-meson states , , , , , that are inevitably present in this channel. The spectrum of eigenstates is extracted using a number of meson-meson and diquark-antidiquark interpolating fields. For our pion mass of 266 MeV we find all the expected two-meson states but no additional candidate for below 4.2 GeV. Possible reasons for not seeing an additional eigenstate related to are discussed. We also illustrate how a simulation incorporating interpolators with a structure resembling low-lying two-meson states seems to render a candidate, which is however not robust after further two-meson states around 4.2 GeV are implemented.
- Received 12 June 2014
DOI:https://doi.org/10.1103/PhysRevD.91.014504
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