Holographic tetraquarks and the newly observed 
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 at LHCb

Liu, Yizhuang; Nowak, Maciej A.; Zahed, Ismaïl

doi:10.1103/physrevd.105.054021

Cited by 7 publications

(1 citation statement)

References 91 publications

(90 reference statements)

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“…In 2017, the LHCb Collaboration observed the first doublecharm hadron Ξ ++ cc [24], and this discovery encourages the research on other double-heavy hadrons, especially the double-charm tetraquark [25][26][27][28][29][30][31][32][33]. Until very recently, the discovery of the T + cc have ignited a new round of passion for the investigation of the double-charm tetraquark state [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51]. Besides, one can get more information from the extensive reviews in recent years [52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Double-charm tetraquark under the complex scaling method

Cheng,

Lin,

Zhu

2022

Preprint

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The LHCb Collaboration discovered a double-charm tetraquark T + cc with a very small width. We investigate the T + cc as a DD * molecule with J P = 1 + in the framework of the one-boson-exchange potential model. The isospin breaking effect and S − D wave coupling are taken into account carefully. We adopt the complex scaling method (CSM) to study the DD * system and obtain a quasibound state corresponding to the T + cc . Its binding energy relative to the D 0 D * + and width are −354 keV and 61 keV respectively. The isospin breaking effect is found to be enormous, and the S−wave D 0 D * + and D + D * 0 components give dominant contributions with the probabilities of 72.1% and 27.1% respectively. In addition, we do not find any resonances in the DD * system. As a by-product, we study the X(3872) as a (D D * − D * D)/ √ 2 molecule with J P C = 1 ++ . We also find a quasibound state corresponding to the X(3872). Its binding energy relative to the D 0 D * 0 threshold and width are −111 keV and 26 keV respectively. The S−wave (D 0 D * 0 − D * 0 D0 )/ √ 2 component dominates this state with the probability of 92.7%.

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Section: Introductionmentioning

confidence: 99%

Double-charm tetraquark under the complex scaling method

Cheng,

Lin,

Zhu

2022

Preprint

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Exotic states with QQQ′¯Q′¯ configuration

Aghbolaghi

Boroun

2023

Commun. Theor. Phys.

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In the framework of a non-relativistic quark model, we have calculated the masses of the \textcolor{red}{$QQ\bar{Q'}\bar{Q'}$} ($Q = c,b,s$ and $ \textcolor{red}{\bar Q'= \bar c, \bar b,\bar s}$) tetraquark states. Using the linear and quadratic confinement potentials inside a Cornell-type potential along with all possible spin and color configurations, the Schroedinger equation masses of these tetraquark states have been calculated. Based on our numerical analysis, linear confinement and quadratic confinement produce acceptable results. Models that use linear confinement estimated charmonium-like tetraquark mass close to experimental data, as well as bottomonium-like tetraquark mass below the threshold of their meson-meson channels.

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