Analysis of the DD¯K System with QCD Sum Rules

Wang, Zhi-Gang  (Department of Physics, North China Electric Power University, Baoding 071003, China) ; Di, Zun-Yan (Department of Physics, North China Electric Power University, Baoding 071003, China) (School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China)

09 April 2019

Abstract: In this article, we construct the color singlet-singlet-singlet interpolating current with IJP=3/21- to study the DD¯K system through QCD sum rules approach. In calculations, we consider the contributions of the vacuum condensates up to dimension-16 and employ the formula μ=MX/Y/Z2-2Mc2 to choose the optimal energy scale of the QCD spectral density. The numerical result MZ=4.71-0.11+0.19GeV indicates that there exists a resonance state Z lying above the DD¯K threshold to saturate the QCD sum rules. This resonance state Z may be found by focusing on the channel J/ψπK of the decay BJ/ψππK in the future.


Published in: Advances in High Energy Physics 2019 (2019) 8958079
Published by: Hindawi
DOI: 10.1155/2019/8958079
arXiv: 1901.05196
License: CC-BY-3.0



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