Evidence for the decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>3872</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:mo>→</mml:mo><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi><mml:mi>ω</mml:mi></mml:math>

Sanchez, P. del Amo; Lees, J. P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Ticó, J. Garra; Graugés, E.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Hooberman, B.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I.; Tanabe, T.; Hawkes, C. M.; Watson, A. T.; Koch, H.; Schroeder, T. Vazquez; Asgeirsson, D. J.; Hearty, C.; Mattison, T. S.; McKenna, J. A.; Khan, A.; Randle-Conde, A.; Blinov, V. E.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.; Yushkov, A. N.; Bondioli, M.; Curry, S.; Kirkby, D.; Lankford, A. J.; Mandelkern, M.; Martin, E. C.; Stoker, D. P.; Atmacan, H.; Gary, J. W.; Liu, F.; Long, O. R.; Vitug, G. M.; Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Richman, J.; Eisner, A. M.; Heusch, C.A.; Kroseberg, J.; Lockman, W. S.; Martínez, A. J.; Schalk, T.; Schumm, B. A.; Seiden, A.; Winstrom, L.; Cheng, C. H.; Doll, D. 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doi:10.1103/physrevd.82.011101

Cited by 165 publications

(60 citation statements)

References 32 publications

Supporting

Mentioning

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“…Moreover, the isospin breaking effect is amplified by the tiny binding energy. As an example, when the binding energy is 0.3 MeV, they found that the isovector component inside the X(3872) is 26%, and the ratio of the two hidden-charm decay modes B(X(3872) → π + π − π 0 J/ψ)/B(X(3872) → π + π − J/ψ) was estimated to be 0.42, consistent with the experimental value [75,90].…”

Section: Molecular Schemesupporting

confidence: 71%

“…which were observed by Belle [75] and BaBar [90], respectively. The difference between B 0 → K 0 X and B ± → K ± X also attracted much experimental interest.…”

Section: The Charmonium-like Xyz Statessupporting

confidence: 62%

“…R Y is three standard deviations below the isospin expectation, but agrees with that of X(3872) [88], while R NR agrees with the isospin expectation. The latter experiment [90] and R Y = 0.7 +0. 4 −0.3 ± 0.1 and R NY = 0.7 ± 0.1 ± 0.1, which are both consistent with the previous results [97], and at the same time (almost) agree with the isospin expectation.…”

Section: +003mentioning

confidence: 99%

“…In 2007, its mass and width were measured to be M = (3914.6 +3.8 −3.4 ± 2.0) MeV and Γ = (34 +12 −8 ± 5) MeV, respectively [97]. In the subsequent experiment in 2010 [90] its mass and width were measured to be M = (3919.1 +3.8 −3.5 ± 2.0) MeV and Γ = (31 +10 −8 ± 5) MeV, respectively. Since these two BaBar experiments studied both the B 0 → K 0 ωJ/ψ and B + → K + ωJ/ψ processes, it allows them to evaluate the two parameters, R Y and R NR , defined as the ratios between the number of B 0 and B + events for the Y(3940) signal and for the nonresonant contribution, respectively.…”

Section: Y(3940)mentioning

confidence: 99%

“…, and used X u and X d to explain the mass difference between the X(3872) state decaying into J/ψπ + π − [63,90] and the one decaying into D 0D0 π 0 [68]. The quantum numbers of the X(3872), both J PC = 2 −+ and 1 ++ , were discussed by Burns, Piccinini, Polosa, and Sabelli in Ref.…”

Section: Molecular Schemementioning

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.

show abstract

Section: Molecular Schemesupporting

confidence: 71%

“…which were observed by Belle [75] and BaBar [90], respectively. The difference between B 0 → K 0 X and B ± → K ± X also attracted much experimental interest.…”

Section: The Charmonium-like Xyz Statessupporting

confidence: 62%

Section: +003mentioning

confidence: 99%

Section: Y(3940)mentioning

confidence: 99%

Section: Molecular Schemementioning

confidence: 99%

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The hidden-charm pentaquark and tetraquark states

et al. 2016

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Heavy quarkonium: progress, puzzles, and opportunities

Brambilla¹,

Eidelman²,

Heltsley³

et al. 2011

Advances in the Physics of Particles and Nuclei

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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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Search for C = + charmonium and XYZ states in e + e − → γ + H at BESIII

Liu

et al. 2014

J. High Energ. Phys.

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Within the framework of nonrelativistic quantum chromodynamics, we study the production of C = + charmonium states H in e + e − → γ + H at BESIII with H = η c (nS) (n=1, 2, 3, and 4), χ cJ (nP) (n=1, 2, and 3), and 1 D 2 (nD) (n=1 and 2). The radiative and relativistic corrections are calculated to next-to-leading order for S and P wave states. We then argue that the search for C = + XY Z states such as X(3872), X(3940), X(4160), and X(4350) in e + e − → γ + H at BESIII may help clarify the nature of these states. BESIII can search for XY Z states through two body process e + e − → γH, where H decay to J/ψπ + π − , J/ψφ, or DD. This result may be useful in identifying the nature of C = + XY Z states. For completeness, the production of C = + charmonium in e + e − → γ + H at B factories is also discussed.

show abstract

Evidence for the decayX(3872)→J/ψω

Cited by 165 publications

References 32 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

Heavy quarkonium: progress, puzzles, and opportunities

Search for C = + charmonium and XYZ states in e + e − → γ + H at BESIII

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