Hadronic molecules in B decays

Chen, Hua-Xing

doi:10.48550/arxiv.2103.08586

Cited by 16 publications

(26 citation statements)

References 148 publications

(189 reference statements)

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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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Section: Introductionmentioning

confidence: 99%

Hidden-charm tetraquarks with strangeness in the chiral quark model

Yang,

Ping,

Segovia

2021

Preprint

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“…They are borrowed from Refs. [48,56], which were obtained in the framework of the the twopoint QCD sum rules. The parameters used in the photon distribution amplitudes are given in Ref.…”

Section: Formalismmentioning

confidence: 99%

“…In Ref. [48], mass, decay constants and production rates of the Z c(s) states were investigated in molecular picture within the QCD sum rules. The obtained results supported that the the Z cs (3985), Z cs (4000) and Z cs (4220) were strange partners of the X(3872), Z c (3900) and Z c (4020), respectively.…”

Section: Formalismmentioning

confidence: 99%

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

Ozdem,

Yildirim

2021

Preprint

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The magnetic dipole moments of the Zc(4020) + , Zc(4200) + , Zcs(4000) + and Zcs(4220) + states are extracted in the framework of the light-cone QCD sum rules. In the calculations, we use the hadronic molecular form of interpolating currents, and photon distribution amplitudes to get the magnetic dipole moment of Zc(4020) + , Zc(4200) + , Zcs(4000) + and Zcs(4220) + tetraquark states. The magnetic dipole moments are obtained as µZ c = 0.66 +0.27 −0.25 , µ Z 1 c = 1.03 +0.32 −0.29 , µZ cs = 0.73 +0.28 −0.26 , µ Z 1 cs = 0.77 +0.27 −0.25 for the Zc(4020) + , Zc(4200) + , Zcs(4000) + and Zcs(4220) + states, respectively. We observe that the results obtained for the Zc(4020) + , Zc(4200) + , Zcs(4000) + and Zcs(4220) + states are large enough to be measured experimentally. As a by product, we predict the magnetic dipole moments of the neutral Zcs(4000) and Zcs(4220) states. The results presented here can serve to be helpful knowledge in experimental as well as theoretical studies of the properties of hidden-charm tetraquark states with and without strangeness.

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“…Obviously, the masses of Z cs (3985) − and Z cs (4000) + are close, but the decay widths are largely different. These observations immediately stimulated a lot of theoretical studies of the open-strange and hidden-charm tetraquarks [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] Some works showed that Z cs (3985) − and Z cs (4000) + are the same states [40,41], while some indicated that they are not the same states [29,[42][43][44].…”

Section: Introductionmentioning

confidence: 99%

The study of double-charm and double-strange tetraquarks

Wu¹,

Jin²,

Liu³

et al. 2021

Preprint

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In the framework of the quark delocalization color screening model (QDCSM), we systematically investigate the double-charm and double-strange tetraquark systems ccss with two structures: meson-meson and diquark-antidiquark. The bound-state calculation shows that there is no any bound state in present work. However, by applying a stabilization calculation and coupling all channels of both two structures, two new resonance states with IJ P = 00 + are obtained. One is more possible to be a molecular resonance state with a mass and width around 4256 MeV and 60 MeV, respectively; another one is more likely to be a compact resonance state with a mass and width around 4308 MeV and 19 MeV, respectively. Although no significant signals were observed in present experiment at the Belle collaboration, there is still some structures around 4.3 GeV in the distributions of M D + s D + s and M D * + s D * + s . We suggest that the experiment can be further tested with a larger amount of data.

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Hadronic molecules in B decays

Cited by 16 publications

References 148 publications

Hidden-charm tetraquarks with strangeness in the chiral quark model

Hidden-charm tetraquarks with strangeness in the chiral quark model

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

The study of double-charm and double-strange tetraquarks

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