| Article | |
| Report number | arXiv:1701.07228 ; CERN-TH-2017-112 |
| Title | Investigating efficient methods for computing four-quark correlation functions |
| Author(s) | Abdel-Rehim, Abdou (SUNY, Utica/Rome ; Cyprus Inst.) ; Alexandrou, Constantia (Cyprus Inst. ; Cyprus U.) ; Berlin, Joshua (Frankfurt U.) ; Dalla Brida, Mattia (INFN, Milan Bicocca ; Milan Bicocca U.) ; Finkenrath, Jacob (Cyprus Inst.) ; Wagner, Marc (Frankfurt U.) |
| Publication | 2017-11 |
| Imprint | 2017-01-25 |
| Number of pages | 25 |
| Note | 47 pages, 18 figures |
| In: | Comput. Phys. Commun. 220 (2017) pp.97-121 |
| DOI | 10.1016/j.cpc.2017.06.021 10.1016/j.cpc.2017.06.021 |
| Subject category | hep-lat ; Particle Physics - Lattice |
| Abstract | We discuss and compare the efficiency of various methods, combinations of point-to-all propagators, stochastic timeslice-to-all propagators, the one-end trick and sequential propagators, to compute two-point correlation functions of two-quark and four-quark interpolating operators of different structure including quark-antiquark type, mesonic molecule type, diquark-antidiquark type and two-meson type. Although we illustrate our methods in the context of the $a_0(980)$, they can be applied for other multi-quark systems, where similar diagrams appear. Thus our results could provide helpful guidelines on the choice of methods for correlation function computation for future lattice QCD studies of meson-meson scattering and possibly existing tetraquark states. |
| Copyright/License | Elsevier B.V. (License: arXiv nonexclusive-distrib. 1.0) |
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