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Z c (4025) as the hadronic molecule with hidden charm

  • Jun He
  • Xiang LiuEmail author
  • Zhi-Feng Sun
  • Shi-Lin ZhuEmail author
Regular Article - Theoretical Physics

Abstract

We have studied the loosely bound \(D^{*}\bar{D}^{*}\) system. Our results indicate that the recently observed charged charmonium-like structure Z c (4025) can be an ideal \(D^{*}\bar{D}^{*}\) molecular state. We have also investigated its pionic, dipionic, and radiative decays. We stress that both the scalar isovector molecular partner Z c0 and three isoscalar partners \({\tilde{Z}}_{c0,c1,c2}\) should also exist if Z c (4025) is a \(D^{*}\bar{D}^{*}\) molecular state in the framework of the one-pion-exchange model. Z c0 can be searched for in the channel e + e YZ c0(4025)(ππ)P-wave where Y can be Y(4260) or any other excited 1−− charmonium or charmonium-like states such as Y(4360), Y(4660), etc. The isoscalar \(D^{*}\bar{D}^{*}\) molecular states \({\tilde{Z}}_{c0,c2}\) with 0+(0++) and 0+(2++) can be searched for in the three pion decay channel \(e^{+}e^{-}\to Y \to {\tilde{Z}}_{c0,c2} (3\pi)^{I=0}_{\text{P-wave}}\). The isoscalar molecular state \({\tilde{Z}}_{c1}\) with 0(1+−) can be searched for in the channel \({\tilde{Z}}_{c1}\eta\). Experimental discovery of these partner states will firmly establish the molecular picture.

Keywords

Heavy Quark Molecular State Heavy Meson Bound State Solution Tetraquark State 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgement

This project is supported by the National Natural Science Foundation of China (Grants No. 11275235, No. 11075004, No. 11021092, No. 11035006, No. 11047606, No. 10805048), and the Ministry of Science and Technology of China (No. 2009CB825200), and the Ministry of Education of China (FANEDD under Grants No. 200924, DPFIHE under Grants No. 20090211120029, NCET under Grants No. NCET-10-0442, the Fundamental Research Funds for the Central Universities under Grants No. lzujbky-2010-69), the Knowledge Innovation Project of the Chinese Academy of Sciences (Grant No. KJCX2-EW-N01).

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Copyright information

© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica 2013

Authors and Affiliations

  1. 1.Research Center for Hadron and CSR PhysicsLanzhou University and Institute of Modern Physics of CASLanzhouChina
  2. 2.School of Physical Science and TechnologyLanzhou UniversityLanzhouChina
  3. 3.Nuclear Theory GroupInstitute of Modern Physics of CASLanzhouChina
  4. 4.Department of Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijingChina

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