Cascade radiative decays of ψ'(3684) and evidence for a new intermediate state of even c-parity

Bartel, W.; Dittmann, P.; Duinker, P.; Olsson, J. E.; O’Neill, L. H.; Pandoulas, D.; Steffen, P.; Fritscher, U.; Heintze, J.; Heinzelmann, G.; Heuer, R. D.; Rieseberg, H.; Wagner, A.

doi:10.1016/0370-2693(78)90413-6

Cited by 37 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(67). This mixing between diquarks with different light flavors was first introduced [285] to explain the decay properties of the X(3872).…”

Section: Qcdsr and X(3872)mentioning

confidence: 99%

“…There were hints in early e + e − → cc data for a purported η c (2S) with mass near 3455 MeV in ψ(2S) → γγJ/ψ events [64] and in inclusive radiative ψ(2S) decays [65,66]. A possible signal [67] near 3591 MeV was reported in 1978 in ψ(2S) → γγJ/ψ. Crystal Ball ruled out that result in 1982 [5] and also reported an η c (2S) signal in inclusive radiative ψ(2S) decays with a mass of 3592±5 MeV.…”

Section: Observation Of ηC(2s)mentioning

confidence: 99%

See 1 more Smart Citation

Heavy quarkonium: progress, puzzles, and opportunities

Brambilla¹,

Eidelman²,

Heltsley³

et al. 2011

Advances in the Physics of Particles and Nuclei

103

View full text Add to dashboard Cite

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.

show abstract

“…(67). This mixing between diquarks with different light flavors was first introduced [285] to explain the decay properties of the X(3872).…”

Section: Qcdsr and X(3872)mentioning

confidence: 99%

Section: Observation Of ηC(2s)mentioning

confidence: 99%

Heavy quarkonium: progress, puzzles, and opportunities

Brambilla¹,

Eidelman²,

Heltsley³

et al. 2011

Advances in the Physics of Particles and Nuclei

103

View full text Add to dashboard Cite

show abstract

Section: Observation Of ηC(2s)mentioning

confidence: 99%

Heavy quarkonium: progress, puzzles, and opportunities

Brambilla,

Eidelman,

Heltsley

et al. 2010

Preprint

224

388

View full text Add to dashboard Cite

X(3872) 3871.52±0.20 1.3±0.6 1 ++ /2 −+ B → K(π + π − J/ψ) Belle [85, 86] (12.8), BABAR [87] (8.6) OK (<2.2) pp → (π + π − J/ψ) + ... CDF [88-90] (np), DØ [91] (5.2) B → K(ωJ/ψ) Belle [92] (4.3), BABAR [93] (4.0) B → K(D * 0 D0 ) Belle [94, 95] (6.4), BABAR [96] (4.9) B → K(γJ/ψ) Belle [92] (4.0), BABAR [97, 98] (3.6) B → K(γψ(2S)) BABAR [98] (3.5), Belle [99] (0.4) X(3915) 3915.6 ± 3.1 28±10 0/2 ?+ B → K(ωJ/ψ) Belle [100] (8.1), BABAR [101] (19) OK e + e − → e + e − (ωJ/ψ) Belle [102] (7.7) X(3940) 3942 +9 −8 37 +27 −17 ? ?+ e + e − → J/ψ(D D * ) Belle [103] (6.0) NC! e + e − → J/ψ (...) Belle [54] (5.0) G(3900) 3943 ± 21 52±11 1 −− e + e − → γ(D D) BABAR [27] (np), Belle [21] (np) OK Y (4008) 4008 +121 − 49 226±97 1 −− e + e − → γ(π + π − J/ψ) Belle [104] (7.4) NC! Z1(4050) + 4051 +24 −43 82 +51 −55 ? B → K(π + χc1(1P )) Belle [105] (5.0) NC! Y (4140) 4143.4 ± 3.0 15 +11 − 7 ? ?+ B → K(φJ/ψ) CDF [106, 107] (5.0) NC! X(4160) 4156 +29 −25 139 +113 −65108, 109] (8.0) OK CLEO [110] (5.4) Belle [104] (15) e + e − → (π + π − J/ψ) CLEO [111] (11) e + e − → (π 0 π 0 J/ψ) CLEO [111] (5.1) Y (4274) 4274.4 +8.4 −6.7 32 +22 −15 ? ?+ B → K(φJ/ψ) CDF [107] (3.1) NC! X(4350) 4350.6 +4.6 −5.1 13.3 +18.4 −10.0 0,2 ++ e + e − → e + e − (φJ/ψ) Belle [112] (3.2) NC!

show abstract

“…We take four different Skyrme forces which all perform very well concerning nuclear bulk properties but differ in details: SkM * as a widely used traditional standard [5], Sly6 as a recent fit which includes information on isotopic trends and neutron matter [6], and SkI3 as well as SkI4 as recent fits which map the relativistic iso-vector structure of the spin-orbit force [7]. SkI3 contains a fixed isovector part analogous to the relativistic mean-field model, whereas SkI4 is adjusted allowing free variation of the isovector spin-orbit term.…”

Section: B Interactions and Symmetriesmentioning

confidence: 99%

α-cluster structure and exotic states in a self-consistent model for light nuclei

Maruhn

Kimura²,

Schramm

et al. 2006

Phys. Rev. C

View full text Add to dashboard Cite

In this paper we examine to what extent traces of α clustering can be found in mean-field ground states of nα-nuclei from 8 Be through 36 Ar as well as in some superdeformed states in 32 S, 36 Ar, and 40 Ca. For this purpose we calculate the overlap of the mean-field Slater determinant with one containg pure Gaussians and perfect spin and isospin symmetry, optimizing the overlap by varying the α-particle positions and radii. In some cases a coherent sum over different configurations is also employed. We find quite large overlaps for some of the lighter systems that diminish for nuclei above 20 Ne but again strong clustering in 36 Ar.

show abstract

Cascade radiative decays of ψ'(3684) and evidence for a new intermediate state of even c-parity

Cited by 37 publications

References 8 publications

Heavy quarkonium: progress, puzzles, and opportunities

Heavy quarkonium: progress, puzzles, and opportunities

Heavy quarkonium: progress, puzzles, and opportunities

α-cluster structure and exotic states in a self-consistent model for light nuclei

Contact Info

Product

Resources

About