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Masses of doubly heavy tetraquarks $Q Q \bar{q} \bar{n}$ with $J^{P} = 1^{+}$

Institute of Theoretical Physics, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

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Duojie Jia

https://orcid.org/0000-0003-4815-6058

Institute of Theoretical Physics, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

E-mail Address: jiadj@nwnu.edu.cn

Corresponding author.

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, and

Yan-Jun Sun

Institute of Theoretical Physics, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

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https://doi.org/10.1142/S0217732322502236Cited by:7 (Source: Crossref)

Abstract

In this paper, we apply the method of QCD sum rules to study the doubly heavy tetraquark states $Q Q \bar{q} \bar{n}$ with spin-parity $J^{P} = 1^{+}$ and strangeness $S = 0, - 1$ using careful estimates of the Borel and threshold parameters involved. Masses of the doubly bottom and charmed tetraquarks with isospin $I = 0, 1 / 2, 1$ are computed precisely via taking into account multifarious condensates up to dimension 10. Compared with the two-heavy meson thresholds, we find that all nonstrange doubly-bottom tetraquarks and a doubly-charmed tetraquarks associated with $J_{3}$ with $J^{P} = 1^{+}$ are stable against strong decay into two bottom mesons while a doubly-charmed tetraquark associated with current $J_{2}$ is unstable against strong decay. By the way, weak decay widths of the doubly bottom tetraquarks are also given.

Keywords:

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