Multiquark resonances

Esposito, A.; Pilloni, A.; Polosa, Antonio D.

doi:10.1016/j.physrep.2016.11.002

Title: Multiquark resonances

Journal Article · Fri Dec 02 00:00:00 EST 2016 · Physics Reports

DOI:https://doi.org/10.1016/j.physrep.2016.11.002· OSTI ID:1345496

Esposito, A. ^[1]; Pilloni, A. ^[2];

^[3]

Columbia Univ., New York, NY (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
"Sapienza" Univ. di Roma, Roma (Italy); CERN, Geneva (Switzerland)

Multiquark resonances are undoubtedly experimentally observed. The number of states and the amount of details on their properties have been growing over the years. It is very recent the discovery of two pentaquarks and the confirmation of four tetraquarks, two of which had not been observed before. We mainly review the theoretical understanding of this sector of particle physics phenomenology and present some considerations attempting a coherent description of the so called X and Z resonances. The prominent problems plaguing theoretical models, like the absence of selection rules limiting the number of states predicted, motivate new directions in model building. Lastly, data are reviewed going through all of the observed resonances with particular attention to their common features and the purpose of providing a starting point to further research.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC05-06OR23177; FG02-11ER41743

OSTI ID:: 1345496

Alternate ID(s):: OSTI ID: 1397932

Report Number(s):: JLAB-THY-16-2301; DOE/OR/23177-3888; arXiv:1611.07920; PII: S037015731630391X; TRN: US1701186

Journal Information:: Physics Reports, Vol. 668, Issue C; ISSN 0370-1573

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 491 works

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Charmed tetraquarks <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:math> and <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi><mml:mi>s</mml:mi></mml:mrow></mml:msub></mml:math> from dynamical lattice QCD simulations Ikeda, Yoichi; Charron, Bruno; Aoki, Sinya Physics Letters B, Vol. 729 https://doi.org/10.1016/j.physletb.2014.01.002	journal	February 2014
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Observation of the charged hadron <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msubsup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>3900</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> and evidence for the neutral <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msubsup><mml:mrow><mml:mi>Z</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>3900</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> in <mml:math altimg="si3.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi>e</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup><mml:mo>→</mml:mo><mml:mi>π</mml:mi><mml:mi>π</mml:mi><mml:mi>J</mml:mi><mml:mo stretchy="false">/</mml:mo><mml:mi>ψ</mml:mi></mml:math> at <mml:math altimg="si4.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt><mml:mo>=</mml:mo><mml:mn>4170</mml:mn><mml:mspace width="0.25em"/><mml:mtext>MeV</mml:mtext></mml:math> Xiao, T.; Dobbs, S.; Tomaradze, A. Physics Letters B, Vol. 727, Issue 4-5 https://doi.org/10.1016/j.physletb.2013.10.041	journal	December 2013
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Quantum numbers of the $X (3872)$ state and orbital angular momentum in its $ρ^{0} J / ψ$ decay Aaij, R.; Adeva, B.; Adinolfi, M. Physical Review D, Vol. 92, Issue 1 https://doi.org/10.1103/PhysRevD.92.011102	journal	July 2015
Observation of a Near-Threshold $D^{0} {\bar{D}}^{0} π^{0}$ Enhancement in $B \to D^{0} {\bar{D}}^{0} π^{0} K$ Decay Gokhroo, G.; Majumder, G.; Abe, K. Physical Review Letters, Vol. 97, Issue 16 https://doi.org/10.1103/PhysRevLett.97.162002	journal	October 2006
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Using line shapes to discriminate between binding mechanisms for the $X (3872)$ Artoisenet, Pierre; Braaten, Eric; Kang, Daekyoung Physical Review D, Vol. 82, Issue 1 https://doi.org/10.1103/PhysRevD.82.014013	journal	July 2010
Lineshapes for composite particles with unstable constituents Hanhart, C.; Kalashnikova, Yu. S.; Nefediev, A. V. Physical Review D, Vol. 81, Issue 9 https://doi.org/10.1103/PhysRevD.81.094028	journal	May 2010
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Evidence for the decay <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd" xmlns:sa="http://www.elsevier.com/xml/common/struct-aff/dtd"><mml:mi mathvariant="normal">X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>3872</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:mo stretchy="false">→</mml:mo><mml:mi mathvariant="normal">ψ</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>2</mml:mn><mml:mi mathvariant="normal">S</mml:mi><mml:mo stretchy="false">)</mml:mo><mml:mi mathvariant="normal">γ</mml:mi></mml:math> Aaij, R.; Adeva, B.; Adinolfi, M. Nuclear Physics B, Vol. 886 https://doi.org/10.1016/j.nuclphysb.2014.06.011	journal	September 2014
Diagnostic decays of the <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>X</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>3872</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> Swanson, Eric S. Physics Letters B, Vol. 598, Issue 3-4 https://doi.org/10.1016/j.physletb.2004.07.059	journal	September 2004
Estimate of the partial width for $X (3872)$ into $p \bar{p}$ Braaten, Eric Physical Review D, Vol. 77, Issue 3 https://doi.org/10.1103/PhysRevD.77.034019	journal	February 2008
Measurements of the branching fractions of $B^{+} \to p \bar{p} K^{+}$ decays Aaij, R.; Abellan Beteta, C.; Adametz, A. The European Physical Journal C, Vol. 73, Issue 6 https://doi.org/10.1140/epjc/s10052-013-2462-2	journal	June 2013
Observation of $X (3872)$ in $B \to X (3872) K π$ decays Bala, A.; Bhardwaj, V.; Trabelsi, K. Physical Review D, Vol. 91, Issue 5 https://doi.org/10.1103/PhysRevD.91.051101	journal	March 2015
Measurements of the Absolute Branching Fractions of $B^{\pm} \to K^{\pm} X_{c \bar{c}}$ Aubert, B.; Barate, R.; Boutigny, D. Physical Review Letters, Vol. 96, Issue 5 https://doi.org/10.1103/PhysRevLett.96.052002	journal	February 2006
Study of $B \to X (3872) K$ , with $X (3872) \to J / ψ π^{+} π^{-}$ Aubert, B.; Bona, M.; Karyotakis, Y. Physical Review D, Vol. 77, Issue 11 https://doi.org/10.1103/PhysRevD.77.111101	journal	June 2008
Precision Measurement of the $X (3872)$ Mass in $J / ψ π^{+} π^{-}$ Decays Aaltonen, T.; Adelman, J.; Akimoto, T. Physical Review Letters, Vol. 103, Issue 15 https://doi.org/10.1103/PhysRevLett.103.152001	journal	October 2009
Search for a charged partner of the $X (3872)$ in the $B$ meson decay $B \to X^{-} K$ , $X^{-} \to J / ψ π^{-} π^{0}$ Aubert, B.; Barate, R.; Boutigny, D. Physical Review D, Vol. 71, Issue 3 https://doi.org/10.1103/PhysRevD.71.031501	journal	February 2005
Two charmoniumlike charged axial resonances near 3885 MeV Voloshin, M. B. Physical Review D, Vol. 94, Issue 7 https://doi.org/10.1103/PhysRevD.94.074010	journal	October 2016
Evidence of a New Narrow Resonance Decaying to $χ_{c 1} γ$ in $B \to χ_{c 1} γ K$ Bhardwaj, V.; Miyabayashi, K.; Adachi, I. Physical Review Letters, Vol. 111, Issue 3 https://doi.org/10.1103/PhysRevLett.111.032001	journal	July 2013
Search for resonant <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>B</mml:mi><mml:mo>±</mml:mo></mml:msup><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>±</mml:mo></mml:msup><mml:mi>h</mml:mi><mml:mo>→</mml:mo><mml:msup><mml:mi>K</mml:mi><mml:mo>±</mml:mo></mml:msup><mml:mi>γ</mml:mi><mml:mi>γ</mml:mi></mml:math> decays at Belle Wicht, J.; Adachi, I.; Aihara, H. Physics Letters B, Vol. 662, Issue 4 https://doi.org/10.1016/j.physletb.2008.03.029	journal	May 2008
Search for $X (3872)$ in $γ γ$ Fusion and Radiative Production at CLEO Dobbs, S.; Metreveli, Z.; Seth, K. K. Physical Review Letters, Vol. 94, Issue 3 https://doi.org/10.1103/PhysRevLett.94.032004	journal	January 2005
An improved limit for $Γ_{e e}$ of $X (3872)$ and $Γ_{e e}$ measurement of $ψ (3686)$ Ablikim, M.; Achasov, M. N.; Ai, X. C. Physics Letters B, Vol. 749 https://doi.org/10.1016/j.physletb.2015.08.013	journal	October 2015
Observation of $Z_{c} (3900)^{0}$ in $e^{+} e^{-} \to π^{0} π^{0} J / ψ$ Ablikim, M.; Achasov, M. N.; Ai, X. C. Physical Review Letters, Vol. 115, Issue 11 https://doi.org/10.1103/PhysRevLett.115.112003	journal	September 2015
Search for $Z_{c} (3900)^{\pm} \to ω π^{\pm}$ Ablikim, M.; Achasov, M. N.; Ai, X. C. Physical Review D, Vol. 92, Issue 3 https://doi.org/10.1103/PhysRevD.92.032009	journal	August 2015
Search for exclusive photoproduction of $Z_{c}^{\pm}$ (3900) at COMPASS Adolph, C.; Akhunzyanov, R.; Alexeev, M. G. Physics Letters B, Vol. 742 https://doi.org/10.1016/j.physletb.2015.01.042	journal	March 2015
Observation of Anomalous $Υ (1 S) π^{+} π^{-}$ and $Υ (2 S) π^{+} π^{-}$ Production near the $Υ (5 S)$ Resonance Chen, K. -F.; Hou, W. -S.; Shapkin, M. Physical Review Letters, Vol. 100, Issue 11 https://doi.org/10.1103/PhysRevLett.100.112001	journal	March 2008
First Observation of the $P$ -Wave Spin-Singlet Bottomonium States $h_{b} (1 P)$ and $h_{b} (2 P)$ Adachi, I.; Aihara, H.; Arinstein, K. Physical Review Letters, Vol. 108, Issue 3 https://doi.org/10.1103/PhysRevLett.108.032001	journal	January 2012
Hidden-beauty charged tetraquarks and heavy quark spin conservation Ali, A.; Maiani, L.; Polosa, A. D. Physical Review D, Vol. 91, Issue 1 https://doi.org/10.1103/PhysRevD.91.017502	journal	January 2015
Amplitude analysis of $e^{+} e^{-} \to ϒ (n S) π^{+} π^{-}$ at $\sqrt{s} = 10.866 GeV$ Garmash, A.; Bondar, A.; Kuzmin, A. Physical Review D, Vol. 91, Issue 7 https://doi.org/10.1103/PhysRevD.91.072003	journal	April 2015
A case for hidden tetraquarks based on cross section between and 11.20 GeV Ali, Ahmed; Hambrock, Christian; Ahmed, Ishtiaq Physics Letters B, Vol. 684, Issue 1 https://doi.org/10.1016/j.physletb.2009.12.053	journal	February 2010
Tetraquark Interpretation of the BELLE Data on the Anomalous $Υ (1 S) π^{+} π^{-}$ and $Υ (2 S) π^{+} π^{-}$ Production near the $Υ (5 S)$ Resonance Ali, Ahmed; Hambrock, Christian; Aslam, M. Jamil Physical Review Letters, Vol. 104, Issue 16 https://doi.org/10.1103/PhysRevLett.104.162001	journal	April 2010
Measurement of the $e^{+} e^{-} \to b \bar{b}$ Cross Section between $\sqrt{s} = 10.54$ and 11.20 GeV Aubert, B.; Bona, M.; Karyotakis, Y. Physical Review Letters, Vol. 102, Issue 1 https://doi.org/10.1103/PhysRevLett.102.012001	journal	January 2009
Measurements of the $ϒ (10860)$ and $ϒ (11020)$ resonances via $σ (e^{+} e^{-} \to ϒ (n S) π^{+} π^{-})$ Santel, D.; Kinoshita, K.; Chang, P. Physical Review D, Vol. 93, Issue 1 https://doi.org/10.1103/PhysRevD.93.011101	journal	January 2016
Consequences of heavy-quark symmetries for hadronic molecules Guo, Feng-Kun; Hidalgo-Duque, Carlos; Nieves, Juan Physical Review D, Vol. 88, Issue 5 https://doi.org/10.1103/PhysRevD.88.054007	journal	September 2013
Observation of $e^{+} e^{-} \to π^{+} π^{-} π^{0} χ_{b J}$ and Search for $X_{b} \to ω ϒ (1 S)$ at $\sqrt{s} = 10.867 GeV$ He, X. H.; Shen, C. P.; Yuan, C. Z. Physical Review Letters, Vol. 113, Issue 14 https://doi.org/10.1103/PhysRevLett.113.142001	journal	September 2014
Search for the $X_{b}$ and other hidden-beauty states in the $π^{+} π^{-} ϒ (1 S)$ channel at ATLAS Aad, G.; Abbott, B.; Abdallah, J. Physics Letters B, Vol. 740 https://doi.org/10.1016/j.physletb.2014.11.055	journal	January 2015
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$Y (4260)$ as the first $S$ -wave open charm vector molecular state? Cleven, Martin; Wang, Qian; Guo, Feng-Kun Physical Review D, Vol. 90, Issue 7 https://doi.org/10.1103/PhysRevD.90.074039	journal	October 2014
Evidence that the <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>Y</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>4660</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> is an <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msub><mml:mi>f</mml:mi><mml:mn>0</mml:mn></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>980</mml:mn><mml:mo stretchy="false">)</mml:mo><mml:msup><mml:mi>ψ</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math> bound state Guo, Feng-Kun; Hanhart, Christoph; Meißner, Ulf-G. Physics Letters B, Vol. 665, Issue 1 https://doi.org/10.1016/j.physletb.2008.05.057	journal	July 2008
Observation of e + e − → K + K − J / ψ via initial-state radiation at Belle Yuan, C. Z.; Shen, C. P.; Wang, P. Physical Review D, Vol. 77, Issue 1 https://doi.org/10.1103/PhysRevD.77.011105	journal	January 2008
Updated cross section measurement of $e^{+} e^{-} \to K^{+} K^{-} J / ψ$ and $K_{S}^{0} K_{S}^{0} J / ψ$ via initial state radiation at Belle Shen, C. P.; Yuan, C. Z.; Wang, P. Physical Review D, Vol. 89, Issue 7 https://doi.org/10.1103/PhysRevD.89.072015	journal	April 2014
Determining the upper limit of <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msub><mml:mi>Γ</mml:mi><mml:mrow><mml:mi>e</mml:mi><mml:mi>e</mml:mi></mml:mrow></mml:msub></mml:math> for the <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>Y</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>4260</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> Mo, X. H.; Li, G.; Yuan, C. Z. Physics Letters B, Vol. 640, Issue 4 https://doi.org/10.1016/j.physletb.2006.07.060	journal	September 2006
Observation of $ψ (4040)$ and $ψ (4160)$ decay into $η J / ψ$ Wang, X. L.; Han, Y. L.; Yuan, C. Z. Physical Review D, Vol. 87, Issue 5 https://doi.org/10.1103/PhysRevD.87.051101	journal	March 2013
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The $e^{+} e^{-} \to 2 (π^{+} π^{-}) π^{0}$ , $2 (π^{+} π^{-}) η$ , $K^{+} K^{-} π^{+} π^{-} π^{0}$ and $K^{+} K^{-} π^{+} π^{-} η$ cross sections measured with initial-state radiation Aubert, B.; Bona, M.; Boutigny, D. Physical Review D, Vol. 76, Issue 9 https://doi.org/10.1103/PhysRevD.76.092005	journal	November 2007
Measurements of $e^{+} e^{-} \to K^{+} K^{-} η$ , $K^{+} K^{-} π^{0}$ , and $K_{s}^{0} K^{\pm} π^{\mp}$ cross sections using initial state radiation events Aubert, B.; Bona, M.; Boutigny, D. Physical Review D, Vol. 77, Issue 9 https://doi.org/10.1103/PhysRevD.77.092002	journal	May 2008
Study of the exclusive initial-state-radiation production of the $D \bar{D}$ system Aubert, B.; Bona, M.; Boutigny, D. Physical Review D, Vol. 76, Issue 11 https://doi.org/10.1103/PhysRevD.76.111105	journal	December 2007
Exclusive initial-state-radiation production of the $D \bar{D}$ , $D^{} \bar{D}$ , and $D^{} {\bar{D}}^{*}$ systems Aubert, B.; Karyotakis, Y.; Lees, J. P. Physical Review D, Vol. 79, Issue 9 https://doi.org/10.1103/PhysRevD.79.092001	journal	May 2009
Measurement of charm production cross sections in $e^{+} e^{-}$ annihilation at energies between 3.97 and 4.26 GeV Cronin-Hennessy, D.; Gao, K. Y.; Hietala, J. Physical Review D, Vol. 80, Issue 7 https://doi.org/10.1103/PhysRevD.80.072001	journal	October 2009
Measurement of the $e^{+} e^{-} \to D^{0} D^{* -} π^{+}$ cross section using initial-state radiation Pakhlova, G.; Aihara, H.; Arinstein, K. Physical Review D, Vol. 80, Issue 9 https://doi.org/10.1103/PhysRevD.80.091101	journal	November 2009
Observation of the $h_{c} (1 P)$ Using $e^{+} e^{-}$ Collisions above the $D \bar{D}$ Threshold Pedlar, T. K.; Cronin-Hennessy, D.; Hietala, J. Physical Review Letters, Vol. 107, Issue 4 https://doi.org/10.1103/PhysRevLett.107.041803	journal	July 2011
Study of $e^{+} e^{-} \to p \bar{p}$ using initial state radiation with BABAR Aubert, B.; Barate, R.; Boutigny, D. Physical Review D, Vol. 73, Issue 1 https://doi.org/10.1103/PhysRevD.73.012005	journal	January 2006
Evidence of a Broad Structure at an Invariant Mass of $4.32 GeV / c^{2}$ in the Reaction $e^{+} e^{-} \to π^{+} π^{-} ψ (2 S)$ Measured at BABAR Aubert, B.; Barate, R.; Bona, M. Physical Review Letters, Vol. 98, Issue 21 https://doi.org/10.1103/PhysRevLett.98.212001	journal	May 2007
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Observation of a Resonancelike Structure in the $π^{+ -} ψ^{'}$ Mass Distribution in Exclusive $B \to K π^{+ -} ψ^{'}$ Decays Choi, S. -K.; Olsen, S. L.; Adachi, I. Physical Review Letters, Vol. 100, Issue 14 https://doi.org/10.1103/PhysRevLett.100.142001	journal	April 2008
Model-independent confirmation of the $Z (4430)^{-}$ state Aaij, R.; Adeva, B.; Adinolfi, M. Physical Review D, Vol. 92, Issue 11 https://doi.org/10.1103/PhysRevD.92.112009	journal	December 2015
Evidence for a Narrow Near-Threshold Structure in the $J / ψ ϕ$ Mass Spectrum in $B^{+} \to J / ψ ϕ K^{+}$ Decays Aaltonen, T.; Adelman, J.; Akimoto, T. Physical Review Letters, Vol. 102, Issue 24 https://doi.org/10.1103/PhysRevLett.102.242002	journal	June 2009
Search for the $X (4140)$ state in $B^{+} \to J / ψ ϕ K^{+}$ decays Aaij, R.; Abellan Beteta, C.; Adeva, B. Physical Review D, Vol. 85, Issue 9 https://doi.org/10.1103/PhysRevD.85.091103	journal	May 2012
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Hadronic molecule structure of the $Y (3940)$ and $Y (4140)$ Branz, Tanja; Gutsche, Thomas; Lyubovitskij, Valery E. Physical Review D, Vol. 80, Issue 5 https://doi.org/10.1103/PhysRevD.80.054019	journal	September 2009
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The pentaquark candidates in the dynamical diquark picture Lebed, Richard F. Physics Letters B, Vol. 749 https://doi.org/10.1016/j.physletb.2015.08.032	journal	October 2015
LHCb pentaquark as a ${\bar{D}}^{} Σ_{c} - {\bar{D}}^{} Σ_{c}^{*}$ molecular state Roca, L.; Nieves, J.; Oset, E. Physical Review D, Vol. 92, Issue 9 https://doi.org/10.1103/PhysRevD.92.094003	journal	November 2015
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Is the $X (3915)$ the $χ_{c 0} (2 P)$ ? Olsen, Stephen Lars Physical Review D, Vol. 91, Issue 5 https://doi.org/10.1103/PhysRevD.91.057501	journal	March 2015
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Precise Predictions of Charmed-Bottom Hadrons from Lattice QCD Mathur, Nilmani; Padmanath, M.; Mondal, Sourav Universität Regensburg https://doi.org/10.5283/epub.38353	text	January 2018
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Comment on `Note on X(3872) production at hadron colliders and its molecular structure' Esposito, A.; Grinstein, B.; Maiani, L. arXiv https://doi.org/10.48550/arxiv.1709.09631	text	January 2017
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Width of a two-body coupled-channel resonance Garcilazo, H.; Valcarce, A. arXiv https://doi.org/10.48550/arxiv.1803.08685	text	January 2018
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Precise predictions of charmed-bottom hadrons from lattice QCD Mathur, Nilmani; Padmanath, M.; Mondal, Sourav arXiv https://doi.org/10.48550/arxiv.1806.04151	text	January 2018
Search for beautiful tetraquarks in the $Υ(1S)μμ$ invariant-mass spectrum Collaboration, LHCb; Aaij, R.; Adeva, B. arXiv https://doi.org/10.48550/arxiv.1806.09707	text	January 2018
Constituent Counting Rules and Exotic Hadrons Lebed, Richard F. arXiv https://doi.org/10.48550/arxiv.1807.01650	text	January 2018
Hidden charm pentaquarks: mass spectrum, magnetic moments, and photocouplings Ortiz-Pacheco, Emmanuel; Bijker, Roelof; Fernández-Ramírez, César arXiv https://doi.org/10.48550/arxiv.1808.10512	text	January 2018
Analysis of the vector tetraquark states with P-waves between the diquarks and antidiquarks via the QCD sum rules Wang, Zhi-Gang arXiv https://doi.org/10.48550/arxiv.1811.02726	text	January 2018
Precision resonance energy scans with the PANDA experiment at FAIR -- Sensitivity study for width and line-shape measurements of the X(3872) Collaboration, The PANDA arXiv https://doi.org/10.48550/arxiv.1812.05132	preprint	January 2018
QCD Sum Rules Approach to the $X,~Y$ and $Z$ States Albuquerque, Raphael M.; Dias, Jorgivan M.; Khemchandani, K. P. arXiv https://doi.org/10.48550/arxiv.1812.08207	text	January 2018
Tetraquark-adequate formulation of QCD sum rules Lucha, Wolfgang; Melikhov, Dmitri; Sazdjian, Hagop arXiv https://doi.org/10.48550/arxiv.1901.03881	text	January 2019
Radial and orbital Regge trajectories in heavy quarkonia Bakker, A. M. Badalian B. L. G. arXiv https://doi.org/10.48550/arxiv.1902.09174	text	January 2019
Weak Decays of Stable Open-bottom Tetraquark by SU(3) Symmetry Analysis Xing, Ye; Yu, Fu-Sheng; Zhu, Ruilin arXiv https://doi.org/10.48550/arxiv.1903.05973	text	January 2019
Scattering amplitudes from finite-volume spectral functions Bulava, John; Hansen, Maxwell T. arXiv https://doi.org/10.48550/arxiv.1903.11735	text	January 2019
Three-body scattering: Ladders and Resonances Mikhasenko, M.; Wunderlich, Y.; Jackura, A. arXiv https://doi.org/10.48550/arxiv.1904.11894	text	January 2019
Cluster reducibility of multiquark operators Lucha, Wolfgang; Melikhov, Dmitri; Sazdjian, Hagop arXiv https://doi.org/10.48550/arxiv.1908.10164	text	January 2019
Tetraquark-adequate QCD sum rules for quark-exchange processes Lucha, Wolfgang; Melikhov, Dmitri; Sazdjian, Hagop arXiv https://doi.org/10.48550/arxiv.1909.06324	text	January 2019

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Journal Article · Fri Apr 30 00:00:00 EDT 2010 · Submitted to Book Chapter in Handbook of High-Temperature Superconductivity: Theory and Experiment (2007) · OSTI ID:1345496

Zhou, X J

Theories of Baryonium, exotics and multiquark systems

Conference · Thu Jan 01 00:00:00 EST 1981 · AIP Conf. Proc.; (United States) · OSTI ID:1345496

Hey, A J.G.

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
tetraquarks
pentaquarks
exotic hadron resonances

Title: Multiquark resonances

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