Hunting for exotic doubly hidden-charm/bottom tetraquark states

We develop a moment QCD sum rule method augmented by fundamental inequalities to study the existence of exotic doubly hidden-charm/bottom tetraquark states made of four heavy quarks. Using the compact diquark–antidiquark configuration, we calculate the mass spectra of these tetraquark states. There...

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Published inPhysics letters. B Vol. 773; pp. 247 - 251
Main Authors Chen, Wei, Chen, Hua-Xing, Liu, Xiang, Steele, T.G., Zhu, Shi-Lin
Format Journal Article
LanguageEnglish
Published Elsevier B.V 10.10.2017
Elsevier
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Online AccessGet full text
ISSN0370-2693
1873-2445
DOI10.1016/j.physletb.2017.08.034

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Abstract We develop a moment QCD sum rule method augmented by fundamental inequalities to study the existence of exotic doubly hidden-charm/bottom tetraquark states made of four heavy quarks. Using the compact diquark–antidiquark configuration, we calculate the mass spectra of these tetraquark states. There are 18 hidden-charm ccc¯c¯ tetraquark currents with JPC=0++, 0−+, 0−−, 1++, 1+−, 1−+, 1−−, and 2++. We use them to perform QCD sum rule analyses, and the obtained masses are all higher than the spontaneous dissociation thresholds of two charmonium mesons, which are thus their dominant decay modes. The masses of the corresponding hidden-bottom bbb¯b¯ tetraquarks are all below or very close to the thresholds of the ϒ(1S)ϒ(1S) and ηb(1S)ηb(1S), except one current of JPC=0++. Hence, we suggest to search for the doubly hidden-charm states in the J/ψJ/ψ and ηc(1S)ηc(1S) channels.
AbstractList We develop a moment QCD sum rule method augmented by fundamental inequalities to study the existence of exotic doubly hidden-charm/bottom tetraquark states made of four heavy quarks. Using the compact diquark–antidiquark configuration, we calculate the mass spectra of these tetraquark states. There are 18 hidden-charm ccc¯c¯ tetraquark currents with JPC=0++, 0−+, 0−−, 1++, 1+−, 1−+, 1−−, and 2++. We use them to perform QCD sum rule analyses, and the obtained masses are all higher than the spontaneous dissociation thresholds of two charmonium mesons, which are thus their dominant decay modes. The masses of the corresponding hidden-bottom bbb¯b¯ tetraquarks are all below or very close to the thresholds of the ϒ(1S)ϒ(1S) and ηb(1S)ηb(1S), except one current of JPC=0++. Hence, we suggest to search for the doubly hidden-charm states in the J/ψJ/ψ and ηc(1S)ηc(1S) channels.
We develop a moment QCD sum rule method augmented by fundamental inequalities to study the existence of exotic doubly hidden-charm/bottom tetraquark states made of four heavy quarks. Using the compact diquark–antidiquark configuration, we calculate the mass spectra of these tetraquark states. There are 18 hidden-charm ccc¯c¯ tetraquark currents with JPC=0++, 0−+, 0−−, 1++, 1+−, 1−+, 1−−, and 2++. We use them to perform QCD sum rule analyses, and the obtained masses are all higher than the spontaneous dissociation thresholds of two charmonium mesons, which are thus their dominant decay modes. The masses of the corresponding hidden-bottom bbb¯b¯ tetraquarks are all below or very close to the thresholds of the ϒ(1S)ϒ(1S) and ηb(1S)ηb(1S), except one current of JPC=0++. Hence, we suggest to search for the doubly hidden-charm states in the J/ψJ/ψ and ηc(1S)ηc(1S) channels. Keywords: Tetraquark states, QCD sum rules, Moment method
Author Chen, Wei
Steele, T.G.
Liu, Xiang
Chen, Hua-Xing
Zhu, Shi-Lin
Author_xml – sequence: 1
  givenname: Wei
  surname: Chen
  fullname: Chen, Wei
  organization: Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
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  givenname: Hua-Xing
  orcidid: 0000-0002-5141-6888
  surname: Chen
  fullname: Chen, Hua-Xing
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  organization: School of Physics and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China
– sequence: 3
  givenname: Xiang
  surname: Liu
  fullname: Liu, Xiang
  email: xiangliu@lzu.edu.cn
  organization: School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
– sequence: 4
  givenname: T.G.
  orcidid: 0000-0003-1716-0783
  surname: Steele
  fullname: Steele, T.G.
  email: tom.steele@usask.ca
  organization: Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, S7N 5E2, Canada
– sequence: 5
  givenname: Shi-Lin
  surname: Zhu
  fullname: Zhu, Shi-Lin
  email: zhusl@pku.edu.cn
  organization: School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
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Keywords Tetraquark states
QCD sum rules
Moment method
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Snippet We develop a moment QCD sum rule method augmented by fundamental inequalities to study the existence of exotic doubly hidden-charm/bottom tetraquark states...
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SubjectTerms Moment method
QCD sum rules
Tetraquark states
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Title Hunting for exotic doubly hidden-charm/bottom tetraquark states
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