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Chen, Ting; Chen, Ying; Gong, Ming; Lei, Yu-Hong; Li, Ning; Liu, Chuan; Liu, Yubin; Liu, Zhao-Feng; Ma, J.P.; Wang, Zhanlin; Zhang, Jianbo

doi:10.1103/physrevd.93.114501

Cited by 15 publications

(11 citation statements)

References 92 publications

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“…Next, in Ref. [66], the mass for Zð4430Þ has been found to be about 4475 MeV, which should again TABLE VIII. Comparison of masses of tetraquarks, in units of MeV, between the masses M calculated in this work and values from other different works investigating tetraquarks.…”

Section: Discussion On Resultsmentioning

confidence: 73%

Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data

Lundhammar

Ohlsson

2020

Phys. Rev. D

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We investigate a nonrelativistic model of tetraquarks, which are assumed to be compact and to consist of diquark-antidiquark pairs. We fit, for the first time, basically all currently known values for the measured masses of 45 mesons, including both charmed and bottom mesons, to the model and predict masses of tetraquarks as well as diquarks. In particular, we find masses of four axial-vector diquarks, i.e., qc, cc, qb, and bb, where q ¼ u, d, and 24 ground-state tetraquarks, including both heavy-light tetraquarks (qcqc and qbqb) and heavy tetraquarks (cccc and bbbb). In general, our results for the masses of qbqb, cccc, and bbbb are largely comparable with other reported results, whereas our results for the masses of qcqc are slightly larger than what has been found earlier. Finally, we identify some of the obtained predictions for masses of tetraquarks with masses of experimental tetraquark candidates, and especially, we find that ψð4660Þ, Z b ð10610Þ, and Z b ð10650Þ could be described by the model.

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Section: Discussion On Resultsmentioning

confidence: 73%

Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data

Lundhammar

Ohlsson

2020

Phys. Rev. D

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“…The Chinese Lattice QCD Collaboration has also studied D * D 1 (Chen et al, 2016e;Meng et al, 2009) and D * D scattering (Chen et al, 2015f) with the aim of investigating the structure of the Z c (4430) and Z c (4025), respectively. These studies were mostly exploratory and no definite statements could be drawn.…”

Section: Lattice Qcd Results On the Charm-strange Mesons And Xy Z mentioning

confidence: 99%

Hadronic molecules

et al. 2018

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A large number of experimental discoveries especially in the heavy quarkonium sector that did not at all fit to the expectations of the until then very successful quark model led to a renaissance of hadron spectroscopy. Among various explanations of the internal structure of these excitations, hadronic molecules, being analogues of light nuclei, play a unique role since for those predictions can be made with controlled uncertainty. We review experimental evidences of various candidates of hadronic molecules, and methods of identifying such structures. Nonrelativistic effective field theories are the suitable framework for studying hadronic molecules, and are discussed in both the continuum and finite volumes. Also pertinent lattice QCD results are presented. Further, we discuss the production mechanisms and decays of hadronic molecules, and comment on the reliability of certain assertions often made in the literature.

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“…A number of other investigations of near-threshold bound states, scattering and resonances in the charm sector have appeared over the last few years [25][26][27][28][29][30][31][32][33][34][35][36][37][38]. There have also been studies addressing the existence of four-quark configurations (mostly considering static heavy quarks) [39][40][41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Excited and exotic charmonium, D s and D meson spectra for two light quark masses from lattice QCD

Cheung

O'Hara

Moir

et al. 2016

J. High Energ. Phys.

144

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We present highly-excited charmonium, D s and D meson spectra from dynamical lattice QCD calculations with light quarks corresponding to M π ∼ 240 MeV and compare these to previous results with M π ∼ 400 MeV. Utilising the distillation framework, large bases of carefully constructed interpolating operators and a variational procedure, we extract and reliably identify the continuum spin of an extensive set of excited mesons. These include states with exotic quantum numbers which, along with a number with nonexotic quantum numbers, we identify as having excited gluonic degrees of freedom and interpret as hybrid mesons. Comparing the spectra at the two different M π , we find only a mild light-quark mass dependence and no change in the overall pattern of states.

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Lattice study of(D¯1D*)

Cited by 15 publications

References 92 publications

Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data

Nonrelativistic model of tetraquarks and predictions for their masses from fits to charmed and bottom meson data

Hadronic molecules

Excited and exotic charmonium, D s and D meson spectra for two light quark masses from lattice QCD

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