Zc(3900) from coupled-channel HAL QCD approach on the lattice

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Abstract

The structure of the Zc(3900) is studied from dynamical lattice simulations of QCD at mπ ≃ 410MeV. The s-wave two-body coupled-channel scatterings in IG(JPC) = 1+(1+-) are carried out on the lattice using the πJ/Ψ-Pn-DD∗ coupled-channel potentials derived from the HAL QCD approach. The calculated invariant mass spectra of the πJ=y and DD∗ show enhancements just above the DD∗ threshold energy due to the strong transition potentials between the πJ=y and DD∗. The poles of the two-body amplitudes are also examined and are found far below the DD∗ threshold energy on the second Riemann sheets, so that the peak corresponding to the Zc(3900) in the invariant mass spectra is naturally explained by not a conventional resonance but a coupled-channel kinematical effects.

Original languageEnglish
Article number091
JournalProceedings of Science
Volume14-18-July-2015
Publication statusPublished - 2015
Externally publishedYes
Event33rd International Symposium on Lattice Field Theory, LATTICE 2015 - Kobe, Japan
Duration: Jul 14 2015Jul 18 2015

All Science Journal Classification (ASJC) codes

  • General

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