A coupled-channel lattice study on the resonance-like structure Zc(3900)

Kleinfercher, Friederike; MPDL
In this exploratory study, near-threshold scattering of D and D¯∗ meson is investigated using lattice QCD with Nf=2+1+1 twisted mass fermion configurations. The calculation is performed within the coupled-channel Lüscher's finite-size formalism. The study focuses on the channel with IG(JPC)=1+(1+−) where the resonance-like structure Zc(3900) was discovered. We first identify the most relevant two channels of the problem and the lattice study is performed within the two-channel scattering model. Combined with a two-channel Ross-Shaw theory,...
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