Short range structure in the X(3872)

Swanson, Eric S.

doi:10.1016/j.physletb.2004.03.033

Cited by 516 publications

(555 citation statements)

References 31 publications

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“…2.1.1.1 for its experimental information). The X(3872) sits on the DD * threshold, which inspired the DD * molecular explanation [197]. Over the past 13 years, there have been heated discussions on this issue.…”

Section: +5mentioning

confidence: 99%

“…The proximity of their masses to the thresholds inspired molecular explanations of these structures [196,215,216,202,217,218,219,220,221,222,223,224,225,203,226,200,227,228,229,230,231,232,233,234,235,236,237,238,239]. With the refinement of the meson exchange model, many subtle aspects of this framework were investigated, such as the S-D wave mixing effect [185,197], coupled-channel effect [240,241,242], and recoil correction [243,244].…”

Section: The Meson Exchange Modelmentioning

confidence: 99%

“…Swanson's model. Swanson proposed to interpret the X(3872) as a J PC = 1 ++ D 0D * 0 hadronic resonance stabilized by the admixture of ωJ/ψ and ρJ/ψ [197], due to the proximity of this state to the DD * threshold. He analysed the X(3872) based on a microscopic model, which incorporates both the quark exchange induced effective interaction…”

Section: Molecular Schemementioning

confidence: 99%

“…Under this molecule picture, Swanson calculated the ratio of B(X(3872) → ψ γ) with respect to B(X(3872) → J/ψγ) to be 4 × 10 −3 [197,219], which largely deviated from the experimental data 3.4 ± 1.4 [89] and 2.46 ± 0.64 ± 0.29 [92]. He derived the ratio of B(X(3872) → γJ/ψ) with respect to B(X(3872) → J/ψπ + π − ) to be around 10 −2 [197,219], while the experimental value is 0.14 ± 0.05 [75] and 0.33 ± 0.12 [89]. Within this model, the ratio of B(X(3872) → D 0D0 π 0 ) with respect to B(X(3872) → J/ψπ + π − ) was inconsistent with experimental data.…”

Section: Molecular Schemementioning

confidence: 99%

“…Many dynamical studies suggested that the D and D * interaction is strongly attractive [197,543,548,220,549,226,223,205,241,243]. Hence, a pure χ c1 (2P) with J PC = 1 ++ can easily couple to the S -wave DD * scattering state if their masses are similar.…”

Section: Lattice Qcdmentioning

confidence: 99%

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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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Section: +5mentioning

confidence: 99%

Section: The Meson Exchange Modelmentioning

confidence: 99%

Section: Molecular Schemementioning

confidence: 99%

Section: Molecular Schemementioning

confidence: 99%

Section: Lattice Qcdmentioning

confidence: 99%

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The hidden-charm pentaquark and tetraquark states

et al. 2016

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Modeling citation dynamics of “atypical” articles

Lei

Wang

2018

Asso for Info Science & Tech

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Modeling and predicting citation dynamics of individual papers is important due to its critical role in a wide range of decisions in science. While current modeling framework successfully captures citation dynamics of typical papers, there exists a non-negligible, and perhaps most interesting, fraction of atypical papers whose citation trajectories do not follow the normal rise-andfall pattern. Here, we systematically study and classify citation patterns of atypical papers, finding that they can be characterized by sleeping beauties, second acts, and a combination of both. We propose a second-act model that can accurately describe the citation dynamics of second-act papers. The model not only provides a mechanistic framework to understand citation patterns of atypical papers, separating factors that drive impact, but it also offers new capabilities to identify the time of exogenous events that influence citations.

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Heavy quarkonium: progress, puzzles, and opportunities

Brambilla¹,

Eidelman²,

Heltsley³

et al. 2011

Advances in the Physics of Particles and Nuclei

103

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A golden age for heavy quarkonium physics dawned a decade ago, initiated by the confluence of exciting advances in quantum chromodynamics (QCD) and an explosion of related experimental activity. The early years of this period were chronicled in the Quarkonium Working Group (QWG) CERN Yellow Report (YR) in 2004, which presented a comprehensive review of the status of the field at that time and provided specific recommendations for further progress. However, the broad spectrum of subsequent breakthroughs, surprises, and continuing puzzles could only be partially anticipated. Since the release of the YR, the BESII program concluded only to give birth to BESIII; the B-factories and CLEO-c flourished; quarkonium production and polarization measurements at HERA and the Tevatron matured; and heavy-ion collisions at RHIC have opened a window on the deconfinement regime. All these experiments leave legacies of quality, precision, and unsolved mysteries for quarkonium physics, and therefore beg for continuing investigations at BESIII, the LHC, RHIC, FAIR, the Super Flavor and/or Tau-Charm factories, JLab, the ILC, and beyond. The list of newly-found conventional states expanded to include hc(1P ), χc2(2P ), B + c , and η b (1S). In addition, the unexpected and still-fascinating X(3872) has been joined by * Editors † Section coordinators ‡ Corresponding author: bkh2@cornell.edu more than a dozen other charmonium-and bottomonium-like "XY Z" states that appear to lie outside the quark model. Many of these still need experimental confirmation. The plethora of new states unleashed a flood of theoretical investigations into new forms of matter such as quark-gluon hybrids, mesonic molecules, and tetraquarks. Measurements of the spectroscopy, decays, production, and in-medium behavior of cc, bb, and bc bound states have been shown to validate some theoretical approaches to QCD and highlight lack of quantitative success for others. Lattice QCD has grown from a tool with computational possibilities to an industrialstrength effort now dependent more on insight and innovation than pure computational power. New effective field theories for the description of quarkonium in different regimes have been developed and brought to a high degree of sophistication, thus enabling precise and solid theoretical predictions. Many expected decays and transitions have either been measured with precision or for the first time, but the confusing patterns of decays, both above and below open-flavor thresholds, endure and have deepened. The intriguing details of quarkonium suppression in heavy-ion collisions that have emerged from RHIC have elevated the importance of separating hotand cold-nuclear-matter effects in quark-gluon plasma studies. This review systematically addresses all these matters and concludes by prioritizing directions for ongoing and future efforts.

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Short range structure in the X(3872)

Cited by 516 publications

References 31 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

Modeling citation dynamics of “atypical” articles

Heavy quarkonium: progress, puzzles, and opportunities

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