Magnetic dipole moments of the $Z_{c}(4020)^+$, $Z_{c}(4200)^+$, $Z_{cs}(4000)^{+}$ and $Z_{cs}(4220)^{+}$ states in light-cone QCD

Ozdem, U.; Yildirim, A. Karadeniz

doi:10.48550/arxiv.2104.13074

Cited by 6 publications

(8 citation statements)

References 35 publications

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“…Quite an extensive body of theoretical work on the hidden-charm, open-strange hadrons exists. For example, in the meson sector whose study forms the bulk of this work, several papers [19][20][21][22][23][24] predate the experimental observations, while multiple studies followed the announcement of the BESIII result but preceded the appearance of the LHCb paper , and yet others appeared subsequent to the LHCb results [18,[48][49][50][51][52][53][54][55]. As one may imagine, this body of work encompasses multiple approaches, including molecular and diquark models, chiral-quark models, and QCD sum rules, among others.…”

Section: D( * )mentioning

confidence: 97%

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Spectrum of the hidden-bottom and the hidden-charm-strange exotics in the dynamical diquark model

Giron

Lebed

2020

Phys. Rev. D

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The observation by BESIII and LHCb of states with hidden charm and open strangeness (ccqs) presents new opportunities for the development of a global model of heavy-quark exotics. Here we extend the dynamical diquark model to encompass such states, using the same values of Hamiltonian parameters previously obtained from the nonstrange and hidden-strange sectors. The large mass splitting between Zcs(4000) and Zcs(4220) suggests substantial SU(3) flavor mixing between all J P = 1 + states, while their average mass compared to that of other sectors offers a direct probe of flavor octet-singlet mixing among exotics. We also explore the inclusion of η-like exchanges within the states, and find their effects to be quite limited. In addition, using the same diquark-mass parameters, we find Pc(4312) and Pcs(4459) to fit well as corresponding nonstrange and openstrange pentaquarks.

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Section: D( * )mentioning

confidence: 97%

“…Using the values of M ccqs 0 , κ sc , κ qc , and V 8 from Table I and the shifted multiplet average mass [using Eq. ( 51)], (54) we tabulate mass values for all members of the Σ + g (1S) ccqs multiplet in Table II.…”

Section: Ccqs Sectormentioning

confidence: 99%

Spectrum of the hidden-bottom and the hidden-charm-strange exotics in the dynamical diquark model

Giron

Lebed

2020

Phys. Rev. D

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“…Thus, whether they are two different states or not, and how to decode their inner structures are now pretty much the agenda for theorists. So far, there are some discussions of their inner structures with various theoretical methods [41,42,43,44,45,46,47,48,49,50]. The most papular interpretation of Z cs (3985)/Z cs (4000) is explaining them as two different states: DD * s /D * D s molecular states [43,48] or compacted tetraquark states ccsū with different spin-parity [41,44,49].…”

Section: Introductionmentioning

confidence: 99%

Aspects of $Z_{cs}(3985)$ and $Z_{cs}(4000)$

Han¹,

Xiao²

2022

Preprint

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In the present work we investigate the ηcK, J/ψK, ηcK * and J/ψK * hidden-charm decay modes for the ccsū four-quark system in the molecular and compact tetraquark scenarios using the quark-exchange model. Our theoretical results indicate that if the newly observed states Zcs(3985) and Zcs(4000) are two different states, Zcs(4000) may be interpreted as the mixtureof which the J/ψK partial decay width is about Γ ∼ 2.89 MeV, while Zcs(3985) may be explained as the mixtureof which the J/ψK partial decay width is small to zero. Moreover, if the state Zcs(4000) can be explained as the mixed stateindeed, the partial decay width ratio between J/ψK and ηcK * is close to unit, which indicates the decay channel ηcK * may be a ideal channel as well to decode the inner structure of Zcs(4000). In addition, the partial decay width for the tensor molecular state |D * 0 D * − s 2 + decaying into J/ψK * can reach up to a few MeV, which shows this tensor molecular state has a good potential to be observed in this decay channel.

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“…Concerning the Z cs (4000), Z cs (4220), X(4630) and X(4685) states, there are in the literature interpretations compatible with hadronic molecules [24][25][26][27], compact tetraquark structures [27][28][29][30] and even non-resonance configurations [31]. Besides, the magnetic moments of the Z cs (4000) and Z cs (4220) are calculated by means of light-cone QCD sum rules [32].…”

Section: Introductionmentioning

confidence: 99%

Hidden-charm tetraquarks with strangeness in the chiral quark model

Yang,

Ping,

Segovia

2021

Preprint

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The hidden-charm tetraquarks with strangeness, ccsq (q = u, d), in J P = 0 + , 1 + and 2 + are systematically investigated in the framework of real-and complex-scaling range of a chiral quark model, whose parameters have been fixed in advance describing hadron, hadron-hadron and multiquark phenomenology. Each tetraquark configuration, compatible with the quantum numbers studied, is taken into account; this includes meson-meson, diquark-antidiquark and K-type arrangements of quarks with all possible color wave functions in four-body sector. Among the different numerical techniques to solve the Schrödinger-like 4-body bound state equation, we use a variational method in which the trial wave function is expanded in complex-range Gaussian basis functions, which is characterized by its simplicity and flexibility. This theoretical framework has already been used to study different kinds of multiquark systems, such as the hidden-charm pentaquarks, P + c , and doubly-charmed tetraquarks, T + cc . The recently reported Zcs states by the BESIII and LHCb collaborations are generally compatible with either compact tetraquark or hadronic molecular resonance configurations in our investigation. Moreover, several additional exotic resonances are found in the mass range between 3.8 GeV and 4.6 GeV.

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Magnetic dipole moments of the $Z_{c}(4020)^+$, $Z_{c}(4200)^+$, $Z_{cs}(4000)^{+}$ and $Z_{cs}(4220)^{+}$ states in light-cone QCD

Cited by 6 publications

References 35 publications

Spectrum of the hidden-bottom and the hidden-charm-strange exotics in the dynamical diquark model

Spectrum of the hidden-bottom and the hidden-charm-strange exotics in the dynamical diquark model

Aspects of $Z_{cs}(3985)$ and $Z_{cs}(4000)$

Hidden-charm tetraquarks with strangeness in the chiral quark model

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