Adiabaticity and color mixing in tetraquark spectroscopy

Vijande, J.; Valcarce, A.; Richard, Jean‐Marc

doi:10.1103/physrevd.87.034040

Cited by 23 publications

(14 citation statements)

References 23 publications

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“…For identical quarks, restrictions apply. When one attempts to restore the proper Fermi statistics, the extra-attraction is lost [40]. The role of Fermi statistics is not mentioned in [4], and hence we believe that they predict binding for a (QQ QQ ) fictitious system with Q = Q but both having the same mass as the b quark.…”

Section: Improved Chromoelectric Modelsmentioning

confidence: 95%

String dynamics and metastability of all-heavy tetraquarks

2017

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Multiquark states have been advocated to explain recent experimental data in the heavy-light sector, and there are already speculations about multiquarks containing only heavy quarks and antiquarks. With a rigorous treatment of the four-body problem in current quark models, full-charm (cccc) and full-beauty (b bbb) tetraquarks are found to be unbound. Thus their stability should rely on more subtle effects that are not included in the simple picture of constituent quarks. The case of (bcbc) might be more favorable if the naive color-additive model of confinement is replaced by a string-inspired interaction. *

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Section: Improved Chromoelectric Modelsmentioning

confidence: 95%

String dynamics and metastability of all-heavy tetraquarks

2017

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“…Different extensions of the constituent quark models for the tetraquark spectroscopy have been explored by Valcarce et al [91][92][93][94][95], Buccella et al [96,97] and Santopinto et al [98][99][100][101]. The idea of probing the number of constituents by producing tetraquark pairs has been discussed in [33][34][35].…”

Section: General Featuresmentioning

confidence: 99%

Multiquark resonances

2017

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Multiquark resonances are undoubtedly experimentally observed. The number of states and the amount of details on their properties have been growing over the years. It is very recent the discovery of two pentaquarks and the confirmation of four tetraquarks, two of which had not been observed before. We mainly review the theoretical understanding of this sector of particle physics phenomenology and present some considerations attempting a coherent description of the so called X and Z resonances. The prominent problems plaguing theoretical models, like the absence of selection rules limiting the number of states predicted, motivate new directions in model building. Data are reviewed going through all of the observed resonances with particular attention to their common features and the purpose of providing a starting point to further research.

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“…energy for the production of a ssbb (sscb) at an electron-positron collider should be √ s > 22 ( √ s > 15) GeV. Of these exotic states, the production of the lowest T cc at various facilities (Tevatron, RHIC, LHC, KEK) has been considered [38][39][40][71][72][73][74]. Because of its clean background, the electron-positron collision experiment has its advantage in searching for T cc .…”

Section: Production and Decaymentioning

confidence: 99%

Exotic tetraquark states with the $$qq\bar{Q}\bar{Q}$$ q q Q ¯ Q ¯ configuration

et al. 2017

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In this work, we study systematically the mass splittings of the qqQQ (q = u, d, s and Q = c, b) tetraquark states with the color-magnetic interaction by considering color mixing effects and estimate roughly their masses. We find that the color mixing effect is relatively important for the J P = 0 + states and possible stable tetraquarks exist in the nnQQ (n = u, d) and nsQQ systems either with J = 0 or with J = 1. Possible decay patterns of the tetraquarks are briefly discussed.

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Adiabaticity and color mixing in tetraquark spectroscopy

Cited by 23 publications

References 23 publications

String dynamics and metastability of all-heavy tetraquarks

String dynamics and metastability of all-heavy tetraquarks

Multiquark resonances

Exotic tetraquark states with the $$qq\bar{Q}\bar{Q}$$ q q Q ¯ Q ¯ configuration

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