Issue |
EPJ Web of Conferences
Volume 20, 2012
Hadron Nuclear Physics 2011 (HNP2011) “Quarks in Hadrons, Nuclei, and Hadronic Matter”
|
|
---|---|---|
Article Number | 01003 | |
Number of page(s) | 7 | |
Section | Hadron Structures | |
DOI | https://doi.org/10.1051/epjconf/20122001003 | |
Published online | 10 February 2012 |
https://doi.org/10.1051/epjconf/20122001003
Spin-1 charmonium-like states in QCD sum rule
1 Department of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
2 Technology and Center of High Energy Physics, Peking University, Beijing 100871, China
a
e-mail: boya@pku.edu.cn
b
e-mail: zhusl@pku.edu.cn
We study the possible spin-1 charmonium-like states by using QCD sum rule approach.We calculate the two-point correlation functions for all the local form tetraquark interpolating currents with JPC = 1−− 1−+, 1++ and 1+− and extract the masses of these tetraquark charmonium-like states. The mass of the 1−− qc state is 4.6 ~ 4.7 GeV, which implies a possible tetraquark interpretation for Y(4660) meson. The masses for both the 1++ qc
and sc
states are 4.0 ~ 4.2 GeV, which is slightly above the mass of X(3872). For the 1−+ and 1+− qc
states, the extracted masses are 4.5 ~ 4.7 GeV and 4.0 ~ 4.2 GeV respectively.
© Owned by the authors, published by EDP Sciences, 2012
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