2014/10/31 by Abdou Abdel-Rehim, Constantia Alexandrou, Abdel-Rehim, Abdou +9
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.48550/arxiv.1410.8757
13 pages, 9 figures, talks given at the 32nd International Symposium on Lattice Field Theory (Lattice 2014), 23-28 June 2014, Columbia University, New York, NY, USA
arxiv created 2014/10/31 · openalex publication_date 2014/10/31 · arxiv updated 2014/11/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss technical aspects and first results of a lattice QCD study of the a0(980) state. We employ various interpolating operators of quark-antiquark, mesonic molecule, diquark-antidiquark and two-meson type. Both connected and disconnected contributions including diagrams with closed fermion loops are computed. To keep statistical errors small, it is essential to optimize the computation of these diagrams by choosing that combination of techniques most appropriate for each type of diagram from the correlation matrix of interpolating operators. We illustrate, how this can be done, by discussing certain diagrams in detail. We also present preliminary results corresponding to a 4× 4 submatrix computed with 2+1 flavors of clover fermions.