English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We combine lattice QCD results for the potential of two static antiquarks inthe presence of two quarks $q q$ of finite mass and quark model techniques tostudy possibly existing $q q \bar{b} \bar{b}$ tetraquarks. While there isstrong indication for a bound four-quark state for $q q = (ud-du) / \sqrt{2}$,i.e. isospin $I=0$, we find clear evidence against the existence ofcorresponding tetraquarks with $q q \in \{ uu , (ud+du) / \sqrt{2} , dd \}$,i.e. isospin $I=1$, $q q = s s$ and $q q = c c$.

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Evidence for the existence of $u d \bar{b} \bar{b}$ and the  non-existence of $s s \bar{b} \bar{b}$ and $c c \bar{b} \bar{b}$ tetraquarks  from lattice QCD