Open charm-bottom axial-vector tetraquarks and their properties

Abstract

The charged axial-vector $J^P=1^{+}$ tetraquarks $Z_q=[cq][\bar{b}\bar{q}]$ and $Z_s=[cs][\bar{b}\bar{s}]$ with the open charm-bottom contents are studied in the diquark-antidiquark model. The masses and meson-current couplings of these states are calculated by employing QCD two-point sum rule approach, where the quark, gluon and mixed condensates up to eight dimensions are taken into account. These parameters of the tetraquark states $Z_q$ and $Z_s$ are used to analyze the vertices $Z_q{B}_c\rho$ and $Z_s{B}_c\varphi$ to determine the strong $g_{Z_q{B}_c\rho }$ and $g_{Z_s{B}_c\varphi }$ couplings. For these purposes, QCD light-cone sum rule method and its soft-meson approximation are utilized. The couplings $g_{Z_q{B}_c\rho }$ and $g_{Z_s{B}_c\varphi }$, extracted from this analysis, are applied for evaluating of the strong $Z_q\to B_c\rho$ and $Z_s\to B_c\varphi$ decays' widths, which are essential results of the present investigation. Our predictions for the masses of the $Z_q$ and $Z_s$ states are confronted with similar results available in the literature.

11 Pages, 5 Figures and 3 Tables

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Cited by in corpus (15)

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• The doubly charmed pseudoscalar tetraquarks $T_{cc;\bar{s}\bar{s}}^{++}$ and $T_{cc;\bar{d}\bar{s}}^{++}$
• New charged resonance $Z_c^{-}(4100)$: the spectroscopic parameters and width
• Electromagnetic form factors of the $B_c$-like tetraquarks: molecular and diquark-antidiquark pictures
• Testing the doubly charged charm-strange tetraquarks
• Stable scalar tetraquark $T_{bb;\bar{u}\bar{d}}^{-}$
• Analysis of the scalar doubly charmed hexaquark state with QCD sum rules
• Properties of ${\Sigma }_Q^{\ast }$, ${\Xi }_Q^{\ast }$ and ${\Omega }_Q^{\ast }$ heavy baryons in cold nuclear matter
• Analysis of the axialvector $B_c$-like tetraquark states with the QCD sum rules
• Probing an axial-vector tetraquark $Z_s$ via its semileptonic decay $Z_s\to X(4274)\overline{l}{\nu }_l$
• The new $a_1(1420)$ state: structure, mass and width
• Triply-charmed hexaquark states with the QCD sum rules
• The scalar and pseudoscalar hidden-charm tetraquark states with QCD sum rules