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 a0(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.

Abdel-Rehim, A., Alexandrou, C., Berlin, J., Dalla Brida, M., Finkenrath, J., Wagner, M. (2017). Investigating efficient methods for computing four-quark correlation functions. COMPUTER PHYSICS COMMUNICATIONS, 220, 97-121 [10.1016/j.cpc.2017.06.021].

Investigating efficient methods for computing four-quark correlation functions

Dalla Brida, M;
2017

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 a0(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.
Articolo in rivista - Articolo scientifico
Lattice QCD; Spectroscopy methods; Tetraquark;
English
2017
220
97
121
reserved
Abdel-Rehim, A., Alexandrou, C., Berlin, J., Dalla Brida, M., Finkenrath, J., Wagner, M. (2017). Investigating efficient methods for computing four-quark correlation functions. COMPUTER PHYSICS COMMUNICATIONS, 220, 97-121 [10.1016/j.cpc.2017.06.021].
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Descrizione: Comput.Phys.Commun. 220 (2017) 97-121
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/184324
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