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Title Tetraquark operators in lattice QCD and exotic flavour states in the charm sector
Abstract We present a general class of operators resembling compact tetraquarks which have a range of colour-flavour-spin structures, transform irreducibly under the symmetries of the lattice and respect other relevant symmetries. These constructions are demonstrated in lattice QCD calculations with light quarks corresponding to $m_\pi =$ 391 MeV. Using the distillation framework, correlation functions involving large bases of meson-meson and tetraquark operators are computed in the isospin-1 hidden-charm and doubly-charmed sectors, and finite-volume spectra are extracted with the variational method. We find the spectra are insensitive to the addition of tetraquark operators to the bases of meson-meson operators. For the first time, through using diverse bases of meson-meson operators, the multiple energy levels associated with meson-meson levels which would be degenerate in the non-interacting limit are extracted reliably. The number of energy levels in each spectrum is found to be equal to th
Author(s) Gavin Cheung, Christopher Thomas, Jozef Dudek, Robert Edwards
Publication Date November 2017
Document Type Journal Article
Primary Institution University of Cambridge, Cambridge, England
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-17-2541 OSTI Number: 1416530
LANL Number: arXiv:1709.01417 Other Number: DOE/OR/23177-4205
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name Journal of High Energy Physics
Refereed Yes
Volume 1711
Issue
Page(s) 33
Attachments/Datasets/DOI Link
Document(s)
10.1007_JHEP11(2017)033.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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