Hughes, C., Eichten, E. and Davies, C. T.H. (2018) Searching for beauty-fully bound tetraquarks using lattice nonrelativistic QCD. Physical Review D, 97(5), 054505. (doi: 10.1103/PhysRevD.97.054505)
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Abstract
Motivated by multiple phenomenological considerations, we perform the first search for the existence of a b¯bbb ¯ tetraquark bound state with a mass below the lowest noninteracting bottomonium-pair threshold using the first-principles lattice nonrelativistic QCD methodology. We use a full S-wave color/spin basis for the b¯bbb ¯ operators in the three 0þþ, 1þ− and 2þþ channels. We employ four gluon field ensembles at multiple lattice spacing values ranging from a ¼ 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 noninteracting thresholds in the channels studied.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Davies, Professor Christine |
| Authors: | Hughes, C., Eichten, E., and Davies, C. T.H. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Physical Review D |
| Publisher: | American Physical Society |
| ISSN: | 1550-7998 |
| ISSN (Online): | 1550-2368 |
| Published Online: | 14 March 2018 |
| Copyright Holders: | Copyright © 2018 The Authors |
| Publisher Policy: | Reproduced under a Creative Commons License |
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