By extracting the transition amplitudes, we give the first lattice QCD
prediction of the two-body decay partial widths of the 1β+ charmoniumlike
hybrid Ξ·c1β. Given the calculated mass value mΞ·c1ββ=4.329(36)
GeV, the Ξ·c1β decay is dominated by the open charm modes D1βDΛ,
DβDΛ and DβDΛβ with partial widths of 258(133) MeV, 88(18)
MeV and 150(118) MeV, respectively. The coupling of Ξ·c1β to
Οc1β plus a flavor singlet pseudoscalar is not small, but
Οc1βΞ· decay is suppressed by the small Ξ·βΞ·β² mixing angle. The
partial width of Ξ·c1ββΞ·cβΞ·β² is estimated to be around 1 MeV. We
suggest experiments to search for Ξ·c1β in the P-wave DβDΛ and
DβDΛβ systems. Especially, the polarization of DβDΛβ can be
used to distinguish the 1β+ product (total spin S=1) from 1ββ
products (S=0).Comment: 16 pages, 8 figure