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Zb (10650) and Zb (10610) states in a chiral quark model

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Abstract:

We perform a systematic study of &$B\bar{B}^*$;, &$B^*\bar{B}^*$;, &$D\bar{D}^*$; and &$D^*\bar{D}^*$; systems by using effective interaction in our chiral quark model. Our results show that the interactions of &$B\bar{B}^*$;, &$B^*\bar{B}^*$;, &$D\bar{D}^*$; and &$D^*\bar{D}^*$; states are attractive, which consequently result in &$B\bar{B}^*$;, &$B^*\bar{B}^*$;, &$D\bar{D}^*$; and &$D^*\bar{D}^*$; bound states. The recent observed exotic-like hadrons of Zb (10610) and Zb (10650) are, therefore, interpreted as loosely bound states of &$B\bar{B}^*$; and &$B^*\bar{B}^*$;, while X(3872) and Y(3940) are &$D\bar{D}^*$; and &$D^*\bar{D}^*$; molecular states, respectively.

Document Type: Research Article

DOI: http://dx.doi.org/10.1088/0954-3899/40/1/015003

Publication date: January 1, 2013

iop/jphysg/2013/00000040/00000001/art015003
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