Abstract.
By assuming that the \( f_0\) and \( a_0^0\) mesons are mixed states of the two-quark-tetraquark, the mixing angle between them is estimated within the QCD sum rules method, and it is obtained that the mixing angle is \( (6.03 \pm 0.08)^\circ\) . Our prediction on the mixing angle can be checked in further experiments which can shed light on choosing the “right” structure of \( f_0\) and \( a_0^0\) mesons.
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Communicated by Shi-Lin Zhu
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Aliev, T.M., Bilmis, S. Determination of f0 - a00 mixing angle from QCD sum rules. Eur. Phys. J. A 54, 147 (2018). https://doi.org/10.1140/epja/i2018-12584-4
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DOI: https://doi.org/10.1140/epja/i2018-12584-4