Abstract
We use the method of double pole QCD sum rule, which is basically a fit with two exponentials of the correlation function, where we can extract the masses and decay constants of mesons as a function of the Borel mass. We apply this method to study the mesons: ρ(1S,2S), ψ(1S,2S), Υ(1S,2S), and ψ t (1S,2S). We also present predictions for the toponiuns masses ψ t (1S,2S) of m(1S)=357 GeV and m(2S)=374 GeV.
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Acknowledgments
We would like to thank Prof. Francisco de Assis de Brito for fruitful discussions. This work has been partially supported by CAPES.
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Maior de Sousa, M.S., da Silva, R.R. The ρ(1S, 2S), ψ(1S, 2S), Υ(1S, 2S) and ψ t (1S, 2S) Mesons in a Double Pole QCD Sum Rule. Braz J Phys 46, 730–739 (2016). https://doi.org/10.1007/s13538-016-0449-9
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DOI: https://doi.org/10.1007/s13538-016-0449-9