Study of the Zc+ channel in lattice QCD

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Several charged charmonium-like hadrons called Zc have been recently discovered by different experiments. In contrast to conventional hadrons these contain at least two valence quarks and antiquarks (ccdu). We perform a lattice QCD simulation of the Iᵍ(JPC)=1+(1⁺⁻) channel including all relevant two-meson operators under 4.3 GeV: J/ψπ, ψ₂ₛπ, ψ₁Dπ, D D*, D* D*, ηc ρ as well as additional diquark anti-diquark operators. In our Nf = 2 simulation with pion mass at 266 MeV we are able to identify all two-meson levels within the energy region of interest. However we find no additional level identifiable as a candidate for Zc.