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 Tools annual

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 Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The spectroscopic parameters and decay channels of the axial-vectortetraquark $T_{bb;\overline{u}\overline{s}}^{-}$ (in what follows, $T_{b:\overline{s}}^{\mathrm{AV}}$) are explored using the quantum chromodynamics(QCD) sum rule method. The mass and coupling of this state are calculated usingtwo-point sum rules by taking into account various vacuum condensates, up to 10dimensions. Our prediction for the mass of this state $m=(10215\pm 250)~\mathrm{MeV}$ confirms that it is stable with respect to strong andelectromagnetic decays and can dissociate to conventional mesons only via weaktransformations. We investigate the dominant semileptonic $T_{b:\overline{s}}^{\mathrm{AV}} \to \mathcal{Z}_{b:\overline{s}}^{0}l\overline{\nu}_l$ andnonleptonic $T_{b:\overline{s}}^{\mathrm{AV}} \to \mathcal{Z}_{b:\overline{s}}^{0}M$ decays of $T_{b:\overline{s}}^{\mathrm{AV}}$. In these processes, $\mathcal{Z}_{b:\overline{s}}^{0}$ is a scalar tetraquark $[bc][\overline{u}\overline{s}]$ built of a color-triplet diquark and an antidiquark, whereas $M$is one of the vector mesons $\rho ^{-}$, $K^{\ast}(892)$, $D^{\ast}(2010)^{-}$, and $D_{s}^{\ast -}$. To calculate the partial widths of thesedecays, we use the QCD three-point sum rule approach and evaluate the weaktransition form factors $G_{i}$ $(i=0,1,2,3)$, which govern these processes.The full width $\Gamma _{\mathrm{full}} =(12.9\pm 2.1)\times10^{-8}~\mathrm{MeV}$ and the mean lifetime $\tau=5.1_{-0.71}^{+0.99}~\mathrm{fs}$ of the tetraquark $T_{b:\overline{s}}^{\mathrm{AV}}$ are computed using the aforementioned weak decays. The obtainedinformation about the parameters of $T_{b:\overline{s}}^{\mathrm{AV}}$ and $\mathcal{Z}_{b:\overline{s}}^{0}$ is useful for experimental investigations ofthese double-heavy exotic mesons.

A family of double-beauty tetraquarks: Axial-vector state $T_{bb;\bar{u}\bar{s}}^{-}$