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The Search for Beauty-fully Bound Tetraquarks Using Lattice Non-Relativistic QCD
- Source :
- Phys. Rev. D 97, 054505 (2018)
- Publication Year :
- 2017
-
Abstract
- Motivated by multiple phenomenological considerations, we perform the first search for the existence of a $\bar{b}\bar{b}bb$ tetraquark bound state with a mass below the lowest non-interacting bottomonium-pair threshold using the first-principles lattice non-relativistic QCD methodology. We use a full $S$-wave colour/spin basis for the $\bar{b}\bar{b}bb$ operators in the three $0^{++}$, $1^{+-}$ and $2^{++}$ channels. We employ four gluon field ensembles at multiple lattice spacing values ranging from $a = 0.06 - 0.12$ fm, all of which include $u$, $d$, $s$ and $c$ quarks in the sea, and one ensemble which has physical light-quark masses. Additionally, we perform novel exploratory work with the objective of highlighting any signal of a near threshold tetraquark, if it existed, by adding an auxiliary potential into the QCD interactions. With our results we find no evidence of a QCD bound tetraquark below the lowest non-interacting thresholds in the channels studied.<br />Comment: 24 Pages; 19 Figures; Accepted By PRD; Unaveraged Correlator Data Publicly Available in SQLite Database
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. D 97, 054505 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1710.03236
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.97.054505