Special Article - Tools for Experiment and Theory
The “closed” chiral symmetry and its application to tetraquark
School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
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Revised: 23 August 2012
Published online: 31 October 2012
We investigate the chiral (flavor) structure of tetraquarks, and study chiral transformation properties of the “non-exotic” and [(8,1)⊕(1,8)] tetraquark chiral multiplets. We find that as long as this kind of tetraquark states contains one quark and one antiquark having the same chirality, such as , they transform in the same way as the lowest level chiral multiplets under chiral transformations. There is only one chiral multiplet whose quark-antiquark pairs all have the opposite chirality (), and it transforms differently from others. Based on these studies, we construct local tetraquark currents belonging to the “non-exotic” chiral multiplet and having quantum numbers J PC =1−+.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2012