The new heavy mesons: A status report

Swanson, Eric S.

doi:10.1016/j.physrep.2006.04.003

Cited by 761 publications

(774 citation statements)

References 201 publications

(198 reference statements)

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“…A potential problem in that value is the insufficient control of theoretical uncertainties in the transition matrix elements to guarantee an accuracy at a percent level, especially when the radial excitations are involved. The corresponding transition matrix elements have been computed by using quark models [3][4][5][6]. 1 Indeed the resulting value m η b = 9390.9±2.1 MeV extracted from the BaBar experiment [1,2] was consistent with the value obtained from the similar measurements made at CLEO [8,9], leading to the following value of the hyperfine splitting [10],…”

Section: Introductionsupporting

confidence: 68%

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Lattice QCD study of the radiative decays J/ψ → η c γ and h c → η c γ

Bečirević

Sanfilippo

2013

J. High Energ. Phys.

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We present the results of our lattice QCD study of the hadronic matrix elements relevant to the physical radiative J/ψ → η c γ and h c → η c γ decays. We used the twisted mass QCD action with N f = 2 light dynamical quarks and from the computations made at four lattice spacings we were able to take the continuum limit. Besides the form factors parameterizing the above decays we also computed: (i) the hyperfine splitting and obtained ∆ = 112 ± 4 MeV, (ii) the annihilation constant f J/ψ which agrees with the one inferred from the measured Γ(J/ψ → e + e − ).

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Section: Introductionsupporting

confidence: 68%

“…Simulations of QCD with 1 For a complete reviews with extensive lists of references please see ref. [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Lattice QCD study of the radiative decays J/ψ → η c γ and h c → η c γ

Bečirević

Sanfilippo

2013

J. High Energ. Phys.

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“…Interested readers may also consult reviews in Refs. [40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,39].…”

Section: General Status Of Hadron Spectroscopymentioning

confidence: 99%

“…X(3940). The 1 ++ assignment of the X(3940) was disfavored by analyzing the recoil mass distribution of the J/ψ [42]. In Fig.…”

Section: X(3940) and X(4160)mentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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“…[6,7] On the other hand, as already mentioned in Ref. [3], we cannot apply the weak-binding relations (1) to the system which has a CDD (Castillejo-Dalitz-Dyson) pole [8] near the threshold. The CDD pole is defined as the pole of the inverse amplitude f −1 .…”

Section: Introductionmentioning

confidence: 93%

Model-Independent Determination of the Compositeness of Near-Threshold Quasibound States

Kamiya¹,

Hyodo²

2017

Proceedings of the 14th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2016)

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We study the compositeness of near-threshold states to clarify the internal structure of exotic hadron candidates. Within the framework of effective field theory, we extend the Weinberg's weak-binding relation to include the nearby CDD (Castillejo-Dalitz-Dyson) pole contribution with the help of the Padé approximant. Finally, using the extended relation, we conclude that the CDD pole contribution to the Λ(1405) baryon in theKN amplitude is negligible.

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The new heavy mesons: A status report

Cited by 761 publications

References 201 publications

Lattice QCD study of the radiative decays J/ψ → η c γ and h c → η c γ

Lattice QCD study of the radiative decays J/ψ → η c γ and h c → η c γ

The hidden-charm pentaquark and tetraquark states

Model-Independent Determination of the Compositeness of Near-Threshold Quasibound States

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