Stable scalar tetraquark $T_{bb;\bar{u}\bar{d}}^{-}$

Abstract

The mass and coupling of the scalar tetraquark $T_{bb;\overline{u}\overline{d}}^{-}$ (hereafter $T_{b:\overline{d}}^{-}$) are calculated in the context of the QCD two-point sum rule method. In computations we take into account effects of various quark, gluon and mixed condensates up to dimension ten. The result obtained for the mass of this state $m=(10135\pm 240)\mathrm{MeV}$ demonstrates that it is stable against the strong and electromagnetic decays. We also explore the dominant semileptonic $T_{b:\overline{d}}^{-}\to {\tilde{Z}}_{bc;\bar{u}\bar{d}}^{0}l{\overline{\nu }}_l$ and nonleptonic decays $T_{b:\overline{d}}^{-}\to {\tilde{Z}}_{bc;\bar{u}\bar{d}}^{0}M$, where ${\tilde{Z}}_{bc;\bar{u}\bar{d}}^0$ is the scalar tetraquark composed of color-sextet diquark and antidiquark, and $M$ is one of the final-state pseudoscalar mesons ${\pi }^{-},K^{-},D^{-}$ and $D_s^{-}$ , respectively. The partial widths of these processes are calculated in terms of the weak form factors $G_{1(2)}(q^2)$, which are determined from the QCD three-point sum rules. Predictions for the mass, full width ${\Gamma }_{\mathrm{full}}=(10.88\pm 1.88)\times 10^{-10}\mathrm{MeV}$, and mean lifetime $\tau =0.61_{-0.09}^{+0.13}\mathrm{ps}$ of the $T_{b:\overline{d}}^{-}$ obtained in the present work can be used in theoretical and experimental studies of this exotic state.

arXiv comment11 Pages, 4 Figures and 2 Tables

References in corpus (31)

• Weak Decays Beyond Leading Logarithms
• QCD Factorization for $B\to \pi \pi$ Decays: Strong Phases and CP Violation in the Heavy Quark Limit
• QCD factorization for exclusive, non-leptonic B meson decays: General arguments and the case of heavy-light final states
• Exotica
• The $\Delta S=1$ Effective Hamiltonian Including Next-to-Leading Order QCD and QED Corrections
• Discovery of doubly-charmed Xi_{cc} baryon implies a stable (b b ubar dbar) tetraquark
• Heavy-quark symmetry implies stable heavy tetraquark mesons $Q_i{Q}_j{\bar{q}}_k{\bar{q}}_l$
• Two--Loop Anomalous Dimension Matrix for $\Delta S=1$ Weak Non-Leptonic Decays II: $\mathcal{O}({\alpha }_e{\alpha }_s)$
• QCD sum rules study of $QQ-\bar{u}\bar{d}$ mesons
• Evidence for charm-bottom tetraquarks and the mass dependence of heavy-light tetraquark states from lattice QCD
• Exotic $QQ\bar{q}\bar{q}$, $QQ\bar{q}\bar{s}$ and $QQ\bar{s}\bar{s}$ states
• Four-quark exotic mesons
• Discovery potential of stable and near-threshold doubly heavy tetraquarks at the LHC
• Prospects of discovering stable double-heavy tetraquarks at a Tera-$Z$ factory
• Doubly Charmed Tetraquarks in B_c and Xi_bc Decays
• Spectroscopy, lifetime and decay modes of the $T_{bb}^{-}$ tetraquark
• Charmed Exotics in Heavy Ion Collisions
• Exotic open-flavor $bc\bar{q}\bar{q}$, $bc\bar{s}\bar{s}$ and $qc\bar{q}\bar{b}$, $sc\bar{s}\bar{b}$ tetraquark states
• Analysis of the scalar, axialvector, vector, tensor doubly charmed tetraquark states with QCD sum rules
• Production of doubly charmed tetraquarks with exotic color configurations in electron-positron collisions
• Weak decays of the axial-vector tetraquark $T_{bb;\bar{u}\bar{d}}^{-}$
• Exotic $bc\bar{q}\bar{q}$ four-quark states
• Exploring the resonances $X(4140)$ and $X(4274)$ through their decay channels
• Production and detection of doubly charmed tetraquarks
• Strong decays of double-charmed pseudoscalar and scalar $cc\overline{u}\overline{d}$ tetraquarks
• Charmlets
• Heavy exotic scalar meson $T_{bb;\bar{u}\bar{s}}^{-}$
• Open charm-bottom axial-vector tetraquarks and their properties
• Double-heavy axial-vector tetraquark $T_{bc;\bar{u}\bar{d}}^0$
• Semileptonic decays of the scalar tetraquark $Z_{bc;\overline{u}\overline{d}}^0$
• Decay modes of the scalar exotic meson $T_{bs;\overline{u}\overline{d}}^{-}$

Cited by in corpus (12)

• Newly observed exotic doubly charmed meson $T_{cc}^{+}$
• Hadronic molecule interpretation of $T_{cc}^{+}$ and its beauty-partners
• Magnetic dipole moments of the $T_{cc}^{+}$ and $Z_V^{++}$ tetraquark states
• Prediction of new $T_{cc}$ states of $D^{\ast }{D}^{\ast }$ and $D_s^{\ast }{D}^{\ast }$ molecular nature
• Doubly heavy tetraquarks in a chiral-diquark picture
• Exploring fully heavy scalar tetraquarks $QQ\overline{Q}\overline{Q}$
• Masses and Magnetic Moments of Doubly Heavy Tetraquarks via Diffusion Monte Carlo Method
• Semileptonic and nonleptonic decays of the axial-vector tetraquark $T_{bb;\overline{u}\overline{d}}^{-}$
• A family of double-beauty tetraquarks: Axial-vector state $T_{bb;\bar{u}\bar{s}}^{-}$
• Magnetic dipole moments of $B_{(s)}^{(\ast )}{B}_{(s)}^{(\ast )}$ states
• Investigation on the bottom analogs of the $T_{cc}^{+}$
• Prediction of an $I(J^P)=0(1^{-})$ $\bar{b}\bar{b}ud$ Tetraquark Resonance Close to the $B^{\ast }{B}^{\ast }$ Threshold Using Lattice QCD Potentials