Confirmation of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Y</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>4260</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math>resonance production in initial state radiation

He, Q.; Insler, J.; Muramatsu, H.; Park, C. S.; Thorndike, E. H.; Yang, F.; Coan, T. E.; Gao, Y. S.; Artuso, M.; Blusk, S.; Butt, J.; Li, J.; Menaa, N.; Mountain, R.; Nisar, S.; Randrianarivony, K.; Sia, R.; Skwarnicki, T.; Stone, S.; Wang, J. C.; Zhang, K.; Csorna, S. E.; Bonvicini, G.; Cinabro, D.; Dubrovin, M.; Lincoln, A.; Asner, D. M.; Edwards, K. W.; Briere, R. A.; Chen, J.; Ferguson, T.; Tatishvili, G.; Vogel, H.; Watkins, M. E.; Rosner, Jonathan L.; Adam, N.; Alexander, J.; Berkelman, K.; Cassel, D. G.; Duboscq, J. E.; Ecklund, K. M.; Ehrlich, R.; Fields, L.; Galik, R. S.; Gibbons, L.; Gray, R.; Gray, S. W.; Hartill, D. L.; Hertz, D.; Jones, C. D.; Kandaswamy, J.; Kreinick, D. L.; Кузнецов, В. Е.; Mahlke-Krüger, H.; Onyisi, P. U. E.; Patterson, J. R.; Peterson, D.; Pivarski, J.; Riley, D.; Rýd, A.; Sadoff, A. J.; Schwarthoff, H.; Shi, X.; Stroiney, S.; Sun, W.; Wilksen, T.; Weinberger, M.; Athar, S. B.; Patel, R.; Potlia, V.; Yelton, J.; Rubin, P.; Cawlfield, C.; Eisenstein, B. I.; Karliner, I.; Kim, D.; Lowrey, N.; Naik, P.; Sedlack, C.; Selen, M.; White, E. J.; Wiss, J.; Mitchell, R. E.; Shepherd, M. R.; Besson, D.; Pedlar, T. K.; Cronin-Hennessy, D.; Gao, K. Y.; Hietala, J.; Kubota, Y.; Klein, T.; Lang, B. W.; Poling, R.; Scott, A. W.; Smith, A. J. S.; Zweber, P.; Dobbs, S.; Metreveli, Z.; Seth, K. K.; Tomaradze, A.; Ernst, J.; Severini, H.; Dytman, S.; Love, W. A.; Savinov, V.; Gutierrez, O. Aquines; Li, Z.; López, A.; Mehrabyan, S.; Méndez, H.; Vargas, J. E. Ramirez; Huang, G. S.; Miller, D. H.; Pavlunin, V.; Sanghi, B.; Shipsey, I. P. J.; Xin, B.; Adams, G. S.; Anderson, M.; Cummings, J. P.; Dankó, I.; Napolitano, J.

doi:10.1103/physrevd.74.091104

Cited by 184 publications

(67 citation statements)

References 17 publications

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“…19. Later, the Y(4260) was confirmed by both the CLEO [60] and Belle [119] collaborations in the same process. Besides the above experimental measurement of the Y(4260), CLEO analyzed the data at the CESR e + e − collisions at √ s = 3.97 − 4.26 GeV [120].…”

Section: Lhcbmentioning

confidence: 77%

“…Let's cherish all the expected and embrace all the unexpected. Belle [63], BaBar [84] Belle [75], BaBar [90] Belle [76], BaBar [87] Belle [75], BaBar [86] CDF [67], D0 [68] LHCb [91], CMS [73] LHCb [92] BESIII [93] BaBar [62], CLEO [60], Belle [119] BaBar [123] CLEO [120] BESIII [64], Belle [124] BESIII [159] BESIII [160] BESIII [161] BESIII [93] Belle [172], Belle [177] P c (4380) + * 4380 ± 8 ± 29 [2] 205 ± 18 ± 86 [2] LHCb [2] …”

Section: Discussionmentioning

confidence: 99%

“…The observed decay modes of the Y(4260) include J/ψπ + π − [62,60,119], J/ψπ 0 π 0 [120], and possibly J/ψK + K − [120]. Additionally, the dipion mass distribution of Y(4260) → π + π − J/ψ was measured [62,60,119,123], and there exists an enhancement around 980 MeV, which may arise from the scalar meson f 0 (980).…”

mentioning

confidence: 99%

“…Additionally, the dipion mass distribution of Y(4260) → π + π − J/ψ was measured [62,60,119,123], and there exists an enhancement around 980 MeV, which may arise from the scalar meson f 0 (980). Especially, BaBar further carried out the analysis of the dipion mass distribution of Y(4260) → π + π − J/ψ (see Fig.…”

mentioning

confidence: 99%

“…The product branching fractions of the Y(4260) in the e + e − annihilations were measured by several experiments [62,60,123]: [123] .…”

mentioning

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: Lhcbmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…The product branching fractions of the Y(4260) in the e + e − annihilations were measured by several experiments [62,60,123]: [123] .…”

mentioning

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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