Investigating efficient methods for computing four-quark correlation functions

被引：8

作者：

Abdel-Rehim, Abdou ^{[1
,2
]}

Alexandrou, Constantia ^{[1
,3
]}

Berlin, Joshua ^{[4
]}

Dalla Brida, Mattia ^{[5
,6
]}

Finkenrath, Jacob ^{[1
]}

Wagner, Marc ^{[4
]}

机构：

[1] Cyprus Inst, Computat Based Sci & Technol Res Ctr, 20 Kavafi St, CY-2121 Nicosia, Cyprus

[2] SUNY Polytech Inst, Dept Engn Sci & Math, Utica, NY 13502 USA

[3] Univ Cyprus, Dept Phys, POB 20537, CY-1678 Nicosia, Cyprus

[4] Goethe Univ Frankfurt Main, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[5] Univ Milano Bicocca, Dipartimento Fis, Piazza Sci 3, I-20126 Milan, Italy

[6] INFN, Sez Milano Bicocca, Piazza Sci 3, I-20126 Milan, Italy

来源：

COMPUTER PHYSICS COMMUNICATIONS | 2017年 / 220卷

关键词：

Lattice QCD; Spectroscopy methods; Tetraquark; LATTICE;

D O I：

10.1016/j.cpc.2017.06.021

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

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. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：97 / 121

页数：25

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