2014/10/31 by Luka Leskovec, Sasa Prelovsek, Leskovec, Luka +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #hep-lat #hep-ph
paper · pdf · doi:10.48550/arxiv.1410.8828
7 pages, 3 figures, Contribution to the 32nd International Symposium on Lattice Field Theory (Lattice 2014), 23-28 June 2014, Columbia University, New York, NY, USA; updated references
arxiv created 2014/11/24 · arxiv updated 2014/11/25
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.