Doubly charged vector tetraquark Z(++) (V) = [cu][sd]


Agaev S. S. , Azizi K., Sundu H.

PHYSICS LETTERS B, vol.820, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 820
  • Publication Date: 2021
  • Doi Number: 10.1016/j.physletb.2021.136530
  • Title of Journal : PHYSICS LETTERS B

Abstract

We explore properties of the doubly charged vector tetraquark ZV++= [cu][sd] built of four quarks of different flavors using the QCD sum rule methods. The mass and current coupling of ZV++ are computed in the framework of the QCD two-point sum rule approach by taking into account quark, gluon and mixed vacuum condensates up to dimension 10. The full width of this tetraquark is saturated by S-wave Z++ V -> pi+Ds1(2460)+, rho+D*s0(2317)+, and P-wave Z++ V -> pi+Ds+, K+D+ decays. Strong couplings required to find partial widths of aforementioned decays are calculated in the context of the QCD light-cone sum rule method and a soft-meson approximation. Our predictions for the mass m = (3515 +/- 125) MeV and full width Pfull =156+56-30 MeV of ZV++ are useful to search for this exotic meson in various processes. Recently, the LHCb collaboration discovered neutral states X0(1)(2900) as resonance-like peaks in D-K+ invariant mass distribution in the decay B+ -> D+D-K+. We argue that mass distribution of D+K+ mesons in the same B decay can be used to observe the doubly charged scalar ZS++ and vector Z ++ V tetraquarks. (c) 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.