Exploring the resonances X(4140) and X(4274) through their decay channels


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AGAEV S. S. , Azizi K., Sundu H.

PHYSICAL REVIEW D, cilt.95, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

Investigation of the resonances X(4140) and X(4274), which were recently confirmed by the LHCb Collaboration [1], is carried out by treating them as the color triplet and sextet [cs] [(c) over bar (s) over bar] diquark-antidiquark states with the spin-parity J(P) = 1(+), respectively. We calculate the masses and meson-current couplings of these tetraquarks in the context of the QCD two-point sum rule method by taking into account the quark, gluon, and mixed vacuum condensates up to eight dimensions. We also study the vertices X(4140)J/psi phi and X(4274)J/psi phi and evaluate corresponding strong couplings g(X(4140)J/psi phi) and g(X(4274)J/psi phi) by means of the QCD light-cone sum rule method and a technique of the soft-meson approximation. In turn, these couplings contain required information to determine the width of the X(4140) -> J/psi phi and X(4274) -> J/psi phi decay channels. We compare our results for the masses and decay widths of the X(4140) and X(4274) resonances with the LHCb data and alternative theoretical predictions.