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

被引：15

作者：

Agaev, S. S. ^{[1
]}

Azizi, K. ^{[2
,3
]}

Sundu, H. ^{[4
]}

机构：

[1] Baku State Univ, Inst Phys Problems, AZ-1148 Baku, Azerbaijan

[2] Univ Tehran, Dept Phys, North Karegar Ave, Tehran 14395547, Iran

[3] Acibadem Univ, Dept Phys, Acibadem Kadikoy, TR-34722 Istanbul, Turkey

[4] Kocaeli Univ, Dept Phys, TR-41380 Izmit, Turkey

来源：

PHYSICS LETTERS B | 2021年 / 820卷

关键词：

EXOTIC MESONS; QCD; PENTAQUARK; DECAY;

D O I：

10.1016/j.physletb.2021.136530

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：9

共 56 条

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