Probing an axial-vector tetraquark $Z_s$ via its semileptonic decay $Z_s\to X(4274)\overline{l}{\nu }_l$

Abstract

The semileptonic decays of the open charm-bottom axial-vector tetraquark $Z_s=[cs][\overline{b}\overline{s}]$ to $X(4274)\overline{l}{\nu }_l$, $l=e,\mu ,\tau$ are explored by means of the QCD three-point sum rule method. Both $Z_s$ and $X(4274)=[cs][\overline{c}\overline{s}]$ are treated as color sextet diquark-antidiquark states. The full width of the decays $Z_s\to X(4274)\overline{l}{\nu }_l$ is found. Obtained predictions for $\Gamma (Z_s\to X(4274)\overline{l}{\nu }_l)$ demonstrate that, as in the case of the conventional hadrons, the semileptonic transitions form a very small part of its full width.

8 Pages, 3 Figures and 1 Table

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Cited by in corpus (9)

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• New charged resonance $Z_c^{-}(4100)$: the spectroscopic parameters and width
• Strong decays of double-charmed pseudoscalar and scalar $cc\overline{u}\overline{d}$ tetraquarks
• Semileptonic and nonleptonic decays of the axial-vector tetraquark $T_{bb;\overline{u}\overline{d}}^{-}$
• Double-heavy axial-vector tetraquark $T_{bc;\bar{u}\bar{d}}^0$
• Semileptonic decays of the scalar tetraquark $Z_{bc;\overline{u}\overline{d}}^0$
• Weak Decays of Doubly-Heavy Tetraquarks $b\bar{c}q\bar{q}$
• Decay modes of the scalar exotic meson $T_{bs;\overline{u}\overline{d}}^{-}$
• Heavy-light hybrid mesons with different spin-parities