Investigating efficient methods for computing four-quark correlation functions

doi:10.1016/j.cpc.2017.06.021

2017-11-01

Abdou Abdel-Rehim

Constantia Alexandrou

DOI：10.1016/j.cpc.2017.06.021

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摘要

En 中文

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.

Keyword:

Lattice QCD

Spectroscopy methods

Tetraquark

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期刊

Computer Physics Communications

IF:

3.4

论文数:

1.2W

被引数:

3.7W

机构

istituto nazionale di fisica nucleare (infn)

学者数:

3.0W

论文数: 1.2W

被引数: 14

university of milano-bicocca

学者数:

2.0W

论文数: 1.5W

被引数: 22

SUNY Polytechnic Institute

学者数:

594

论文数: 461

被引数: 528

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